Resolves: RHEL-62324 - (Regression) Transfer-encoding:chunked data is not sent
to the client in its complementary
This commit is contained in:
Luboš Uhliarik
parent
dd9c76343a
commit
d775ad6323
367
squid-5.5-ignore-wsp-after-chunk-size.patch
Normal file
367
squid-5.5-ignore-wsp-after-chunk-size.patch
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@ -0,0 +1,367 @@
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From 8d0ee420a4d91ac7fd97316338f1e28b4b060cbf Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Lubo=C5=A1=20Uhliarik?= <luhliari@redhat.com>
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Date: Thu, 10 Oct 2024 19:26:27 +0200
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Subject: [PATCH 1/6] Ignore whitespace chars after chunk-size
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Previously (before #1498 change), squid was accepting TE-chunked replies
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with whitespaces after chunk-size and missing chunk-ext data. After
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It turned out that replies with such whitespace chars are pretty
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common and other webservers which can act as forward proxies (e.g.
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nginx, httpd...) are accepting them.
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This change will allow to proxy chunked responses from origin server,
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which had whitespaces inbetween chunk-size and CRLF.
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---
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src/http/one/TeChunkedParser.cc | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/src/http/one/TeChunkedParser.cc b/src/http/one/TeChunkedParser.cc
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index 9cce10fdc91..04753395e16 100644
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--- a/src/http/one/TeChunkedParser.cc
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+++ b/src/http/one/TeChunkedParser.cc
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@@ -125,6 +125,7 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
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// Code becomes much simpler when incremental parsing functions throw on
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// bad or insufficient input, like in the code below. TODO: Expand up.
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try {
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+ tok.skipAll(CharacterSet::WSP); // Some servers send SP/TAB after chunk-size
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parseChunkExtensions(tok); // a possibly empty chunk-ext list
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tok.skipRequired("CRLF after [chunk-ext]", Http1::CrLf());
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buf_ = tok.remaining();
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From 9c8d35f899035fa06021ab3fe6919f892c2f0c6b Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Lubo=C5=A1=20Uhliarik?= <luhliari@redhat.com>
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Date: Fri, 11 Oct 2024 02:06:31 +0200
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Subject: [PATCH 2/6] Added new argument to Http::One::ParseBws()
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Depending on new wsp_only argument in ParseBws() it will be decided
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which set of whitespaces characters will be parsed. If wsp_only is set
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to true, only SP and HTAB chars will be parsed.
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Also optimized number of ParseBws calls.
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---
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src/http/one/Parser.cc | 4 ++--
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src/http/one/Parser.h | 3 ++-
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src/http/one/TeChunkedParser.cc | 13 +++++++++----
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src/http/one/TeChunkedParser.h | 2 +-
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4 files changed, 14 insertions(+), 8 deletions(-)
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diff --git a/src/http/one/Parser.cc b/src/http/one/Parser.cc
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index b1908316a0b..01d7e3bc0e8 100644
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--- a/src/http/one/Parser.cc
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+++ b/src/http/one/Parser.cc
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@@ -273,9 +273,9 @@ Http::One::ErrorLevel()
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// BWS = *( SP / HTAB ) ; WhitespaceCharacters() may relax this RFC 7230 rule
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void
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-Http::One::ParseBws(Parser::Tokenizer &tok)
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+Http::One::ParseBws(Parser::Tokenizer &tok, const bool wsp_only)
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{
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- const auto count = tok.skipAll(Parser::WhitespaceCharacters());
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+ const auto count = tok.skipAll(wsp_only ? CharacterSet::WSP : Parser::WhitespaceCharacters());
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if (tok.atEnd())
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throw InsufficientInput(); // even if count is positive
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diff --git a/src/http/one/Parser.h b/src/http/one/Parser.h
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index d9a0ac8c273..08200371cd6 100644
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--- a/src/http/one/Parser.h
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+++ b/src/http/one/Parser.h
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@@ -163,8 +163,9 @@ class Parser : public RefCountable
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};
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/// skips and, if needed, warns about RFC 7230 BWS ("bad" whitespace)
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+/// \param wsp_only force skipping of whitespaces only, don't consider skipping relaxed delimeter chars
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/// \throws InsufficientInput when the end of BWS cannot be confirmed
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-void ParseBws(Parser::Tokenizer &);
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+void ParseBws(Parser::Tokenizer &, const bool wsp_only = false);
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/// the right debugs() level for logging HTTP violation messages
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int ErrorLevel();
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diff --git a/src/http/one/TeChunkedParser.cc b/src/http/one/TeChunkedParser.cc
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index 04753395e16..41e1e5ddaea 100644
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--- a/src/http/one/TeChunkedParser.cc
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+++ b/src/http/one/TeChunkedParser.cc
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@@ -125,8 +125,11 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
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// Code becomes much simpler when incremental parsing functions throw on
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// bad or insufficient input, like in the code below. TODO: Expand up.
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try {
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- tok.skipAll(CharacterSet::WSP); // Some servers send SP/TAB after chunk-size
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- parseChunkExtensions(tok); // a possibly empty chunk-ext list
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+ // A possibly empty chunk-ext list. If no chunk-ext has been found,
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+ // try to skip trailing BWS, because some servers send "chunk-size BWS CRLF".
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+ if (!parseChunkExtensions(tok))
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+ ParseBws(tok, true);
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+
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tok.skipRequired("CRLF after [chunk-ext]", Http1::CrLf());
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buf_ = tok.remaining();
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parsingStage_ = theChunkSize ? Http1::HTTP_PARSE_CHUNK : Http1::HTTP_PARSE_MIME;
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@@ -140,20 +143,22 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
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/// Parses the chunk-ext list (RFC 9112 section 7.1.1:
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/// chunk-ext = *( BWS ";" BWS chunk-ext-name [ BWS "=" BWS chunk-ext-val ] )
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-void
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+bool
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Http::One::TeChunkedParser::parseChunkExtensions(Tokenizer &callerTok)
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{
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+ bool foundChunkExt = false;
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do {
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auto tok = callerTok;
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ParseBws(tok); // Bug 4492: IBM_HTTP_Server sends SP after chunk-size
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if (!tok.skip(';'))
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- return; // reached the end of extensions (if any)
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+ return foundChunkExt; // reached the end of extensions (if any)
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parseOneChunkExtension(tok);
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buf_ = tok.remaining(); // got one extension
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callerTok = tok;
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+ foundChunkExt = true;
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} while (true);
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}
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diff --git a/src/http/one/TeChunkedParser.h b/src/http/one/TeChunkedParser.h
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index 02eacd1bb89..8c5d4bb4cba 100644
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--- a/src/http/one/TeChunkedParser.h
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+++ b/src/http/one/TeChunkedParser.h
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@@ -71,7 +71,7 @@ class TeChunkedParser : public Http1::Parser
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private:
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bool parseChunkSize(Tokenizer &tok);
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bool parseChunkMetadataSuffix(Tokenizer &);
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- void parseChunkExtensions(Tokenizer &);
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+ bool parseChunkExtensions(Tokenizer &);
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void parseOneChunkExtension(Tokenizer &);
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bool parseChunkBody(Tokenizer &tok);
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bool parseChunkEnd(Tokenizer &tok);
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From 81e67f97f9c386bdd0bb4a5e182395c46adb70ad Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Lubo=C5=A1=20Uhliarik?= <luhliari@redhat.com>
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Date: Fri, 11 Oct 2024 02:44:33 +0200
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Subject: [PATCH 3/6] Fix typo in Parser.h
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---
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src/http/one/Parser.h | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/http/one/Parser.h b/src/http/one/Parser.h
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index 08200371cd6..3ef4c5f7752 100644
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--- a/src/http/one/Parser.h
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+++ b/src/http/one/Parser.h
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@@ -163,7 +163,7 @@ class Parser : public RefCountable
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};
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/// skips and, if needed, warns about RFC 7230 BWS ("bad" whitespace)
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-/// \param wsp_only force skipping of whitespaces only, don't consider skipping relaxed delimeter chars
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+/// \param wsp_only force skipping of whitespaces only, don't consider skipping relaxed delimiter chars
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/// \throws InsufficientInput when the end of BWS cannot be confirmed
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void ParseBws(Parser::Tokenizer &, const bool wsp_only = false);
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From a0d4fe1794e605f8299a5c118c758a807453f016 Mon Sep 17 00:00:00 2001
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From: Alex Rousskov <rousskov@measurement-factory.com>
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Date: Thu, 10 Oct 2024 22:39:42 -0400
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Subject: [PATCH 4/6] Bug 5449 is a regression of Bug 4492!
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Both bugs deal with "chunk-size SP+ CRLF" use cases. Bug 4492 had _two_
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spaces after chunk-size, which answers one of the PR review questions:
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Should we skip just one space? No, we should not.
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The lines moved around in many commits, but I believe this regression
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was introduced in commit 951013d0 because that commit stopped consuming
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partially parsed chunk-ext sequences. That consumption was wrong, but it
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had a positive side effect -- fixing Bug 4492...
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---
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src/http/one/TeChunkedParser.cc | 10 +++++-----
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1 file changed, 5 insertions(+), 5 deletions(-)
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diff --git a/src/http/one/TeChunkedParser.cc b/src/http/one/TeChunkedParser.cc
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index 41e1e5ddaea..aa4a840fdcf 100644
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--- a/src/http/one/TeChunkedParser.cc
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+++ b/src/http/one/TeChunkedParser.cc
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@@ -125,10 +125,10 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
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// Code becomes much simpler when incremental parsing functions throw on
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// bad or insufficient input, like in the code below. TODO: Expand up.
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try {
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- // A possibly empty chunk-ext list. If no chunk-ext has been found,
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- // try to skip trailing BWS, because some servers send "chunk-size BWS CRLF".
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- if (!parseChunkExtensions(tok))
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- ParseBws(tok, true);
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+ // Bug 4492: IBM_HTTP_Server sends SP after chunk-size
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+ ParseBws(tok, true);
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+
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+ parseChunkExtensions(tok);
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tok.skipRequired("CRLF after [chunk-ext]", Http1::CrLf());
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buf_ = tok.remaining();
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@@ -150,7 +150,7 @@ Http::One::TeChunkedParser::parseChunkExtensions(Tokenizer &callerTok)
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do {
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auto tok = callerTok;
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- ParseBws(tok); // Bug 4492: IBM_HTTP_Server sends SP after chunk-size
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+ ParseBws(tok);
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if (!tok.skip(';'))
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return foundChunkExt; // reached the end of extensions (if any)
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From f837f5ff61301a17008f16ce1fb793c2abf19786 Mon Sep 17 00:00:00 2001
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From: Alex Rousskov <rousskov@measurement-factory.com>
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Date: Thu, 10 Oct 2024 23:06:42 -0400
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Subject: [PATCH 5/6] fixup: Fewer conditionals/ifs and more explicit spelling
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... to draw code reader attention when something unusual is going on.
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---
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src/http/one/Parser.cc | 22 ++++++++++++++++++----
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src/http/one/Parser.h | 10 ++++++++--
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src/http/one/TeChunkedParser.cc | 14 ++++++--------
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src/http/one/TeChunkedParser.h | 2 +-
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4 files changed, 33 insertions(+), 15 deletions(-)
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diff --git a/src/http/one/Parser.cc b/src/http/one/Parser.cc
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index 01d7e3bc0e8..d3937e5e96b 100644
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--- a/src/http/one/Parser.cc
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+++ b/src/http/one/Parser.cc
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@@ -271,11 +271,12 @@ Http::One::ErrorLevel()
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return Config.onoff.relaxed_header_parser < 0 ? DBG_IMPORTANT : 5;
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}
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-// BWS = *( SP / HTAB ) ; WhitespaceCharacters() may relax this RFC 7230 rule
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-void
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-Http::One::ParseBws(Parser::Tokenizer &tok, const bool wsp_only)
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+/// common part of ParseBws() and ParseStrctBws()
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+namespace Http::One {
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+static void
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+ParseBws_(Parser::Tokenizer &tok, const CharacterSet &bwsChars)
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{
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- const auto count = tok.skipAll(wsp_only ? CharacterSet::WSP : Parser::WhitespaceCharacters());
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+ const auto count = tok.skipAll(bwsChars);
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if (tok.atEnd())
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throw InsufficientInput(); // even if count is positive
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@@ -290,4 +291,17 @@ Http::One::ParseBws(Parser::Tokenizer &tok, const bool wsp_only)
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// success: no more BWS characters expected
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}
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+} // namespace Http::One
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+
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+void
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+Http::One::ParseBws(Parser::Tokenizer &tok)
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+{
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+ ParseBws_(tok, CharacterSet::WSP);
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+}
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+
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+void
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+Http::One::ParseStrictBws(Parser::Tokenizer &tok)
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|
+{
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+ ParseBws_(tok, Parser::WhitespaceCharacters());
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+}
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diff --git a/src/http/one/Parser.h b/src/http/one/Parser.h
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index 3ef4c5f7752..49e399de546 100644
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|
--- a/src/http/one/Parser.h
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|
+++ b/src/http/one/Parser.h
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@@ -163,9 +163,15 @@ class Parser : public RefCountable
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|
};
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|
|
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|
/// skips and, if needed, warns about RFC 7230 BWS ("bad" whitespace)
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|
-/// \param wsp_only force skipping of whitespaces only, don't consider skipping relaxed delimiter chars
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/// \throws InsufficientInput when the end of BWS cannot be confirmed
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-void ParseBws(Parser::Tokenizer &, const bool wsp_only = false);
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|
+/// \sa WhitespaceCharacters() for the definition of BWS characters
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+/// \sa ParseStrictBws() that avoids WhitespaceCharacters() uncertainties
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+void ParseBws(Parser::Tokenizer &);
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+
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+/// Like ParseBws() but only skips CharacterSet::WSP characters. This variation
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|
+/// must be used if the next element may start with CR or any other character
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|
+/// from RelaxedDelimiterCharacters().
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+void ParseStrictBws(Parser::Tokenizer &);
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|
/// the right debugs() level for logging HTTP violation messages
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|
int ErrorLevel();
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|
diff --git a/src/http/one/TeChunkedParser.cc b/src/http/one/TeChunkedParser.cc
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|
index aa4a840fdcf..859471b8c77 100644
|
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|
--- a/src/http/one/TeChunkedParser.cc
|
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|
+++ b/src/http/one/TeChunkedParser.cc
|
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|
@@ -125,11 +125,11 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
|
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|
// Code becomes much simpler when incremental parsing functions throw on
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|
// bad or insufficient input, like in the code below. TODO: Expand up.
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|
try {
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|
- // Bug 4492: IBM_HTTP_Server sends SP after chunk-size
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|
- ParseBws(tok, true);
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|
-
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|
- parseChunkExtensions(tok);
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|
+ // Bug 4492: IBM_HTTP_Server sends SP after chunk-size.
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|
+ // No ParseBws() here because it may consume CR required further below.
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|
+ ParseStrictBws(tok);
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|
|
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|
+ parseChunkExtensions(tok); // a possibly empty chunk-ext list
|
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|
tok.skipRequired("CRLF after [chunk-ext]", Http1::CrLf());
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|
buf_ = tok.remaining();
|
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|
parsingStage_ = theChunkSize ? Http1::HTTP_PARSE_CHUNK : Http1::HTTP_PARSE_MIME;
|
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|
@@ -143,22 +143,20 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
|
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|
|
||||||
|
/// Parses the chunk-ext list (RFC 9112 section 7.1.1:
|
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|
/// chunk-ext = *( BWS ";" BWS chunk-ext-name [ BWS "=" BWS chunk-ext-val ] )
|
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|
-bool
|
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|
+void
|
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|
Http::One::TeChunkedParser::parseChunkExtensions(Tokenizer &callerTok)
|
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|
{
|
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|
- bool foundChunkExt = false;
|
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|
do {
|
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|
auto tok = callerTok;
|
||||||
|
|
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|
ParseBws(tok);
|
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|
|
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|
if (!tok.skip(';'))
|
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|
- return foundChunkExt; // reached the end of extensions (if any)
|
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|
+ return; // reached the end of extensions (if any)
|
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|
|
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|
parseOneChunkExtension(tok);
|
||||||
|
buf_ = tok.remaining(); // got one extension
|
||||||
|
callerTok = tok;
|
||||||
|
- foundChunkExt = true;
|
||||||
|
} while (true);
|
||||||
|
}
|
||||||
|
|
||||||
|
diff --git a/src/http/one/TeChunkedParser.h b/src/http/one/TeChunkedParser.h
|
||||||
|
index 8c5d4bb4cba..02eacd1bb89 100644
|
||||||
|
--- a/src/http/one/TeChunkedParser.h
|
||||||
|
+++ b/src/http/one/TeChunkedParser.h
|
||||||
|
@@ -71,7 +71,7 @@ class TeChunkedParser : public Http1::Parser
|
||||||
|
private:
|
||||||
|
bool parseChunkSize(Tokenizer &tok);
|
||||||
|
bool parseChunkMetadataSuffix(Tokenizer &);
|
||||||
|
- bool parseChunkExtensions(Tokenizer &);
|
||||||
|
+ void parseChunkExtensions(Tokenizer &);
|
||||||
|
void parseOneChunkExtension(Tokenizer &);
|
||||||
|
bool parseChunkBody(Tokenizer &tok);
|
||||||
|
bool parseChunkEnd(Tokenizer &tok);
|
||||||
|
|
||||||
|
From f79936a234e722adb2dd08f31cf6019d81ee712c Mon Sep 17 00:00:00 2001
|
||||||
|
From: Alex Rousskov <rousskov@measurement-factory.com>
|
||||||
|
Date: Thu, 10 Oct 2024 23:31:08 -0400
|
||||||
|
Subject: [PATCH 6/6] fixup: Deadly typo
|
||||||
|
|
||||||
|
---
|
||||||
|
src/http/one/Parser.cc | 4 ++--
|
||||||
|
1 file changed, 2 insertions(+), 2 deletions(-)
|
||||||
|
|
||||||
|
diff --git a/src/http/one/Parser.cc b/src/http/one/Parser.cc
|
||||||
|
index d3937e5e96b..7403a9163a2 100644
|
||||||
|
--- a/src/http/one/Parser.cc
|
||||||
|
+++ b/src/http/one/Parser.cc
|
||||||
|
@@ -296,12 +296,12 @@ ParseBws_(Parser::Tokenizer &tok, const CharacterSet &bwsChars)
|
||||||
|
void
|
||||||
|
Http::One::ParseBws(Parser::Tokenizer &tok)
|
||||||
|
{
|
||||||
|
- ParseBws_(tok, CharacterSet::WSP);
|
||||||
|
+ ParseBws_(tok, Parser::WhitespaceCharacters());
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
Http::One::ParseStrictBws(Parser::Tokenizer &tok)
|
||||||
|
{
|
||||||
|
- ParseBws_(tok, Parser::WhitespaceCharacters());
|
||||||
|
+ ParseBws_(tok, CharacterSet::WSP);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
10
squid.spec
10
squid.spec
@ -2,7 +2,7 @@
|
|||||||
|
|
||||||
Name: squid
|
Name: squid
|
||||||
Version: 5.5
|
Version: 5.5
|
||||||
Release: 14%{?dist}
|
Release: 15%{?dist}
|
||||||
Summary: The Squid proxy caching server
|
Summary: The Squid proxy caching server
|
||||||
Epoch: 7
|
Epoch: 7
|
||||||
# See CREDITS for breakdown of non GPLv2+ code
|
# See CREDITS for breakdown of non GPLv2+ code
|
||||||
@ -80,6 +80,9 @@ Patch513: squid-5.5-CVE-2024-25111.patch
|
|||||||
Patch514: squid-5.5-CVE-2024-37894.patch
|
Patch514: squid-5.5-CVE-2024-37894.patch
|
||||||
# https://bugzilla.redhat.com/show_bug.cgi?id=2260051
|
# https://bugzilla.redhat.com/show_bug.cgi?id=2260051
|
||||||
Patch515: squid-5.5-CVE-2024-23638.patch
|
Patch515: squid-5.5-CVE-2024-23638.patch
|
||||||
|
# Regression caused by squid-5.5-CVE-2023-46846.patch
|
||||||
|
# Upstream PR: https://github.com/squid-cache/squid/pull/1914
|
||||||
|
Patch516: squid-5.5-ignore-wsp-after-chunk-size.patch
|
||||||
|
|
||||||
# cache_swap.sh
|
# cache_swap.sh
|
||||||
Requires: bash gawk
|
Requires: bash gawk
|
||||||
@ -171,6 +174,7 @@ lookup program (dnsserver), a program for retrieving FTP data
|
|||||||
%patch513 -p1 -b .CVE-2024-25111
|
%patch513 -p1 -b .CVE-2024-25111
|
||||||
%patch514 -p1 -b .CVE-2024-37894
|
%patch514 -p1 -b .CVE-2024-37894
|
||||||
%patch515 -p1 -b .CVE-2024-23638
|
%patch515 -p1 -b .CVE-2024-23638
|
||||||
|
%patch516 -p1 -b .ignore-wsp-chunk-sz
|
||||||
|
|
||||||
|
|
||||||
# https://bugzilla.redhat.com/show_bug.cgi?id=1679526
|
# https://bugzilla.redhat.com/show_bug.cgi?id=1679526
|
||||||
@ -398,6 +402,10 @@ fi
|
|||||||
|
|
||||||
|
|
||||||
%changelog
|
%changelog
|
||||||
|
* Mon Oct 14 2024 Luboš Uhliarik <luhliari@redhat.com> - 7:5.5-15
|
||||||
|
- Resolves: RHEL-62324 - (Regression) Transfer-encoding:chunked data is not sent
|
||||||
|
to the client in its complementary
|
||||||
|
|
||||||
* Mon Jul 01 2024 Luboš Uhliarik <luhliari@redhat.com> - 7:5.5-14
|
* Mon Jul 01 2024 Luboš Uhliarik <luhliari@redhat.com> - 7:5.5-14
|
||||||
- Resolves: RHEL-45057 - squid: Out-of-bounds write error may lead to Denial of
|
- Resolves: RHEL-45057 - squid: Out-of-bounds write error may lead to Denial of
|
||||||
Service (CVE-2024-37894)
|
Service (CVE-2024-37894)
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user