Resolves: RHEL-56024 - (Regression) Transfer-encoding:chunked data is not sent
to the client in its complementary
This commit is contained in:
Luboš Uhliarik
parent
853f0a2a45
commit
b13c51c015
367
squid-4.15-ignore-wsp-after-chunk-size.patch
Normal file
367
squid-4.15-ignore-wsp-after-chunk-size.patch
Normal file
@ -0,0 +1,367 @@
|
||||
From 8d0ee420a4d91ac7fd97316338f1e28b4b060cbf Mon Sep 17 00:00:00 2001
|
||||
From: =?UTF-8?q?Lubo=C5=A1=20Uhliarik?= <luhliari@redhat.com>
|
||||
Date: Thu, 10 Oct 2024 19:26:27 +0200
|
||||
Subject: [PATCH 1/6] Ignore whitespace chars after chunk-size
|
||||
|
||||
Previously (before #1498 change), squid was accepting TE-chunked replies
|
||||
with whitespaces after chunk-size and missing chunk-ext data. After
|
||||
|
||||
It turned out that replies with such whitespace chars are pretty
|
||||
common and other webservers which can act as forward proxies (e.g.
|
||||
nginx, httpd...) are accepting them.
|
||||
|
||||
This change will allow to proxy chunked responses from origin server,
|
||||
which had whitespaces inbetween chunk-size and CRLF.
|
||||
---
|
||||
src/http/one/TeChunkedParser.cc | 1 +
|
||||
1 file changed, 1 insertion(+)
|
||||
|
||||
diff --git a/src/http/one/TeChunkedParser.cc b/src/http/one/TeChunkedParser.cc
|
||||
index 9cce10fdc91..04753395e16 100644
|
||||
--- a/src/http/one/TeChunkedParser.cc
|
||||
+++ b/src/http/one/TeChunkedParser.cc
|
||||
@@ -125,6 +125,7 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
|
||||
// Code becomes much simpler when incremental parsing functions throw on
|
||||
// bad or insufficient input, like in the code below. TODO: Expand up.
|
||||
try {
|
||||
+ tok.skipAll(CharacterSet::WSP); // Some servers send SP/TAB after chunk-size
|
||||
parseChunkExtensions(tok); // a possibly empty chunk-ext list
|
||||
tok.skipRequired("CRLF after [chunk-ext]", Http1::CrLf());
|
||||
buf_ = tok.remaining();
|
||||
|
||||
From 9c8d35f899035fa06021ab3fe6919f892c2f0c6b Mon Sep 17 00:00:00 2001
|
||||
From: =?UTF-8?q?Lubo=C5=A1=20Uhliarik?= <luhliari@redhat.com>
|
||||
Date: Fri, 11 Oct 2024 02:06:31 +0200
|
||||
Subject: [PATCH 2/6] Added new argument to Http::One::ParseBws()
|
||||
|
||||
Depending on new wsp_only argument in ParseBws() it will be decided
|
||||
which set of whitespaces characters will be parsed. If wsp_only is set
|
||||
to true, only SP and HTAB chars will be parsed.
|
||||
|
||||
Also optimized number of ParseBws calls.
|
||||
---
|
||||
src/http/one/Parser.cc | 4 ++--
|
||||
src/http/one/Parser.h | 3 ++-
|
||||
src/http/one/TeChunkedParser.cc | 13 +++++++++----
|
||||
src/http/one/TeChunkedParser.h | 2 +-
|
||||
4 files changed, 14 insertions(+), 8 deletions(-)
|
||||
|
||||
diff --git a/src/http/one/Parser.cc b/src/http/one/Parser.cc
|
||||
index b1908316a0b..01d7e3bc0e8 100644
|
||||
--- a/src/http/one/Parser.cc
|
||||
+++ b/src/http/one/Parser.cc
|
||||
@@ -273,9 +273,9 @@ Http::One::ErrorLevel()
|
||||
|
||||
// BWS = *( SP / HTAB ) ; WhitespaceCharacters() may relax this RFC 7230 rule
|
||||
void
|
||||
-Http::One::ParseBws(Parser::Tokenizer &tok)
|
||||
+Http::One::ParseBws(Parser::Tokenizer &tok, const bool wsp_only)
|
||||
{
|
||||
- const auto count = tok.skipAll(Parser::WhitespaceCharacters());
|
||||
+ const auto count = tok.skipAll(wsp_only ? CharacterSet::WSP : Parser::WhitespaceCharacters());
|
||||
|
||||
if (tok.atEnd())
|
||||
throw InsufficientInput(); // even if count is positive
|
||||
diff --git a/src/http/one/Parser.h b/src/http/one/Parser.h
|
||||
index d9a0ac8c273..08200371cd6 100644
|
||||
--- a/src/http/one/Parser.h
|
||||
+++ b/src/http/one/Parser.h
|
||||
@@ -163,8 +163,9 @@ class Parser : public RefCountable
|
||||
};
|
||||
|
||||
/// skips and, if needed, warns about RFC 7230 BWS ("bad" whitespace)
|
||||
+/// \param wsp_only force skipping of whitespaces only, don't consider skipping relaxed delimeter chars
|
||||
/// \throws InsufficientInput when the end of BWS cannot be confirmed
|
||||
-void ParseBws(Parser::Tokenizer &);
|
||||
+void ParseBws(Parser::Tokenizer &, const bool wsp_only = false);
|
||||
|
||||
/// the right debugs() level for logging HTTP violation messages
|
||||
int ErrorLevel();
|
||||
diff --git a/src/http/one/TeChunkedParser.cc b/src/http/one/TeChunkedParser.cc
|
||||
index 04753395e16..41e1e5ddaea 100644
|
||||
--- a/src/http/one/TeChunkedParser.cc
|
||||
+++ b/src/http/one/TeChunkedParser.cc
|
||||
@@ -125,8 +125,11 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
|
||||
// Code becomes much simpler when incremental parsing functions throw on
|
||||
// bad or insufficient input, like in the code below. TODO: Expand up.
|
||||
try {
|
||||
- tok.skipAll(CharacterSet::WSP); // Some servers send SP/TAB after chunk-size
|
||||
- parseChunkExtensions(tok); // a possibly empty chunk-ext list
|
||||
+ // A possibly empty chunk-ext list. If no chunk-ext has been found,
|
||||
+ // try to skip trailing BWS, because some servers send "chunk-size BWS CRLF".
|
||||
+ if (!parseChunkExtensions(tok))
|
||||
+ ParseBws(tok, true);
|
||||
+
|
||||
tok.skipRequired("CRLF after [chunk-ext]", Http1::CrLf());
|
||||
buf_ = tok.remaining();
|
||||
parsingStage_ = theChunkSize ? Http1::HTTP_PARSE_CHUNK : Http1::HTTP_PARSE_MIME;
|
||||
@@ -140,20 +143,22 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
|
||||
|
||||
/// Parses the chunk-ext list (RFC 9112 section 7.1.1:
|
||||
/// chunk-ext = *( BWS ";" BWS chunk-ext-name [ BWS "=" BWS chunk-ext-val ] )
|
||||
-void
|
||||
+bool
|
||||
Http::One::TeChunkedParser::parseChunkExtensions(Tokenizer &callerTok)
|
||||
{
|
||||
+ bool foundChunkExt = false;
|
||||
do {
|
||||
auto tok = callerTok;
|
||||
|
||||
ParseBws(tok); // Bug 4492: IBM_HTTP_Server sends SP after chunk-size
|
||||
|
||||
if (!tok.skip(';'))
|
||||
- return; // reached the end of extensions (if any)
|
||||
+ return foundChunkExt; // reached the end of extensions (if any)
|
||||
|
||||
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 02eacd1bb89..8c5d4bb4cba 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 &);
|
||||
- void parseChunkExtensions(Tokenizer &);
|
||||
+ bool parseChunkExtensions(Tokenizer &);
|
||||
void parseOneChunkExtension(Tokenizer &);
|
||||
bool parseChunkBody(Tokenizer &tok);
|
||||
bool parseChunkEnd(Tokenizer &tok);
|
||||
|
||||
From 81e67f97f9c386bdd0bb4a5e182395c46adb70ad Mon Sep 17 00:00:00 2001
|
||||
From: =?UTF-8?q?Lubo=C5=A1=20Uhliarik?= <luhliari@redhat.com>
|
||||
Date: Fri, 11 Oct 2024 02:44:33 +0200
|
||||
Subject: [PATCH 3/6] Fix typo in Parser.h
|
||||
|
||||
---
|
||||
src/http/one/Parser.h | 2 +-
|
||||
1 file changed, 1 insertion(+), 1 deletion(-)
|
||||
|
||||
diff --git a/src/http/one/Parser.h b/src/http/one/Parser.h
|
||||
index 08200371cd6..3ef4c5f7752 100644
|
||||
--- a/src/http/one/Parser.h
|
||||
+++ b/src/http/one/Parser.h
|
||||
@@ -163,7 +163,7 @@ class Parser : public RefCountable
|
||||
};
|
||||
|
||||
/// skips and, if needed, warns about RFC 7230 BWS ("bad" whitespace)
|
||||
-/// \param wsp_only force skipping of whitespaces only, don't consider skipping relaxed delimeter chars
|
||||
+/// \param wsp_only force skipping of whitespaces only, don't consider skipping relaxed delimiter chars
|
||||
/// \throws InsufficientInput when the end of BWS cannot be confirmed
|
||||
void ParseBws(Parser::Tokenizer &, const bool wsp_only = false);
|
||||
|
||||
|
||||
From a0d4fe1794e605f8299a5c118c758a807453f016 Mon Sep 17 00:00:00 2001
|
||||
From: Alex Rousskov <rousskov@measurement-factory.com>
|
||||
Date: Thu, 10 Oct 2024 22:39:42 -0400
|
||||
Subject: [PATCH 4/6] Bug 5449 is a regression of Bug 4492!
|
||||
|
||||
Both bugs deal with "chunk-size SP+ CRLF" use cases. Bug 4492 had _two_
|
||||
spaces after chunk-size, which answers one of the PR review questions:
|
||||
Should we skip just one space? No, we should not.
|
||||
|
||||
The lines moved around in many commits, but I believe this regression
|
||||
was introduced in commit 951013d0 because that commit stopped consuming
|
||||
partially parsed chunk-ext sequences. That consumption was wrong, but it
|
||||
had a positive side effect -- fixing Bug 4492...
|
||||
---
|
||||
src/http/one/TeChunkedParser.cc | 10 +++++-----
|
||||
1 file changed, 5 insertions(+), 5 deletions(-)
|
||||
|
||||
diff --git a/src/http/one/TeChunkedParser.cc b/src/http/one/TeChunkedParser.cc
|
||||
index 41e1e5ddaea..aa4a840fdcf 100644
|
||||
--- a/src/http/one/TeChunkedParser.cc
|
||||
+++ b/src/http/one/TeChunkedParser.cc
|
||||
@@ -125,10 +125,10 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
|
||||
// Code becomes much simpler when incremental parsing functions throw on
|
||||
// bad or insufficient input, like in the code below. TODO: Expand up.
|
||||
try {
|
||||
- // A possibly empty chunk-ext list. If no chunk-ext has been found,
|
||||
- // try to skip trailing BWS, because some servers send "chunk-size BWS CRLF".
|
||||
- if (!parseChunkExtensions(tok))
|
||||
- ParseBws(tok, true);
|
||||
+ // Bug 4492: IBM_HTTP_Server sends SP after chunk-size
|
||||
+ ParseBws(tok, true);
|
||||
+
|
||||
+ parseChunkExtensions(tok);
|
||||
|
||||
tok.skipRequired("CRLF after [chunk-ext]", Http1::CrLf());
|
||||
buf_ = tok.remaining();
|
||||
@@ -150,7 +150,7 @@ Http::One::TeChunkedParser::parseChunkExtensions(Tokenizer &callerTok)
|
||||
do {
|
||||
auto tok = callerTok;
|
||||
|
||||
- ParseBws(tok); // Bug 4492: IBM_HTTP_Server sends SP after chunk-size
|
||||
+ ParseBws(tok);
|
||||
|
||||
if (!tok.skip(';'))
|
||||
return foundChunkExt; // reached the end of extensions (if any)
|
||||
|
||||
From f837f5ff61301a17008f16ce1fb793c2abf19786 Mon Sep 17 00:00:00 2001
|
||||
From: Alex Rousskov <rousskov@measurement-factory.com>
|
||||
Date: Thu, 10 Oct 2024 23:06:42 -0400
|
||||
Subject: [PATCH 5/6] fixup: Fewer conditionals/ifs and more explicit spelling
|
||||
|
||||
... to draw code reader attention when something unusual is going on.
|
||||
---
|
||||
src/http/one/Parser.cc | 22 ++++++++++++++++++----
|
||||
src/http/one/Parser.h | 10 ++++++++--
|
||||
src/http/one/TeChunkedParser.cc | 14 ++++++--------
|
||||
src/http/one/TeChunkedParser.h | 2 +-
|
||||
4 files changed, 33 insertions(+), 15 deletions(-)
|
||||
|
||||
diff --git a/src/http/one/Parser.cc b/src/http/one/Parser.cc
|
||||
index 01d7e3bc0e8..d3937e5e96b 100644
|
||||
--- a/src/http/one/Parser.cc
|
||||
+++ b/src/http/one/Parser.cc
|
||||
@@ -271,11 +271,12 @@ Http::One::ErrorLevel()
|
||||
return Config.onoff.relaxed_header_parser < 0 ? DBG_IMPORTANT : 5;
|
||||
}
|
||||
|
||||
-// BWS = *( SP / HTAB ) ; WhitespaceCharacters() may relax this RFC 7230 rule
|
||||
-void
|
||||
-Http::One::ParseBws(Parser::Tokenizer &tok, const bool wsp_only)
|
||||
+/// common part of ParseBws() and ParseStrctBws()
|
||||
+namespace Http::One {
|
||||
+static void
|
||||
+ParseBws_(Parser::Tokenizer &tok, const CharacterSet &bwsChars)
|
||||
{
|
||||
- const auto count = tok.skipAll(wsp_only ? CharacterSet::WSP : Parser::WhitespaceCharacters());
|
||||
+ const auto count = tok.skipAll(bwsChars);
|
||||
|
||||
if (tok.atEnd())
|
||||
throw InsufficientInput(); // even if count is positive
|
||||
@@ -290,4 +291,17 @@ Http::One::ParseBws(Parser::Tokenizer &tok, const bool wsp_only)
|
||||
|
||||
// success: no more BWS characters expected
|
||||
}
|
||||
+} // namespace Http::One
|
||||
+
|
||||
+void
|
||||
+Http::One::ParseBws(Parser::Tokenizer &tok)
|
||||
+{
|
||||
+ ParseBws_(tok, CharacterSet::WSP);
|
||||
+}
|
||||
+
|
||||
+void
|
||||
+Http::One::ParseStrictBws(Parser::Tokenizer &tok)
|
||||
+{
|
||||
+ ParseBws_(tok, Parser::WhitespaceCharacters());
|
||||
+}
|
||||
|
||||
diff --git a/src/http/one/Parser.h b/src/http/one/Parser.h
|
||||
index 3ef4c5f7752..49e399de546 100644
|
||||
--- a/src/http/one/Parser.h
|
||||
+++ b/src/http/one/Parser.h
|
||||
@@ -163,9 +163,15 @@ class Parser : public RefCountable
|
||||
};
|
||||
|
||||
/// skips and, if needed, warns about RFC 7230 BWS ("bad" whitespace)
|
||||
-/// \param wsp_only force skipping of whitespaces only, don't consider skipping relaxed delimiter chars
|
||||
/// \throws InsufficientInput when the end of BWS cannot be confirmed
|
||||
-void ParseBws(Parser::Tokenizer &, const bool wsp_only = false);
|
||||
+/// \sa WhitespaceCharacters() for the definition of BWS characters
|
||||
+/// \sa ParseStrictBws() that avoids WhitespaceCharacters() uncertainties
|
||||
+void ParseBws(Parser::Tokenizer &);
|
||||
+
|
||||
+/// Like ParseBws() but only skips CharacterSet::WSP characters. This variation
|
||||
+/// must be used if the next element may start with CR or any other character
|
||||
+/// from RelaxedDelimiterCharacters().
|
||||
+void ParseStrictBws(Parser::Tokenizer &);
|
||||
|
||||
/// the right debugs() level for logging HTTP violation messages
|
||||
int ErrorLevel();
|
||||
diff --git a/src/http/one/TeChunkedParser.cc b/src/http/one/TeChunkedParser.cc
|
||||
index aa4a840fdcf..859471b8c77 100644
|
||||
--- a/src/http/one/TeChunkedParser.cc
|
||||
+++ b/src/http/one/TeChunkedParser.cc
|
||||
@@ -125,11 +125,11 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
|
||||
// Code becomes much simpler when incremental parsing functions throw on
|
||||
// bad or insufficient input, like in the code below. TODO: Expand up.
|
||||
try {
|
||||
- // Bug 4492: IBM_HTTP_Server sends SP after chunk-size
|
||||
- ParseBws(tok, true);
|
||||
-
|
||||
- parseChunkExtensions(tok);
|
||||
+ // Bug 4492: IBM_HTTP_Server sends SP after chunk-size.
|
||||
+ // No ParseBws() here because it may consume CR required further below.
|
||||
+ ParseStrictBws(tok);
|
||||
|
||||
+ parseChunkExtensions(tok); // a possibly empty chunk-ext list
|
||||
tok.skipRequired("CRLF after [chunk-ext]", Http1::CrLf());
|
||||
buf_ = tok.remaining();
|
||||
parsingStage_ = theChunkSize ? Http1::HTTP_PARSE_CHUNK : Http1::HTTP_PARSE_MIME;
|
||||
@@ -143,22 +143,20 @@ Http::One::TeChunkedParser::parseChunkMetadataSuffix(Tokenizer &tok)
|
||||
|
||||
/// Parses the chunk-ext list (RFC 9112 section 7.1.1:
|
||||
/// chunk-ext = *( BWS ";" BWS chunk-ext-name [ BWS "=" BWS chunk-ext-val ] )
|
||||
-bool
|
||||
+void
|
||||
Http::One::TeChunkedParser::parseChunkExtensions(Tokenizer &callerTok)
|
||||
{
|
||||
- bool foundChunkExt = false;
|
||||
do {
|
||||
auto tok = callerTok;
|
||||
|
||||
ParseBws(tok);
|
||||
|
||||
if (!tok.skip(';'))
|
||||
- return foundChunkExt; // reached the end of extensions (if any)
|
||||
+ return; // reached the end of extensions (if any)
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
|
||||
11
squid.spec
11
squid.spec
@ -2,7 +2,7 @@
|
||||
|
||||
Name: squid
|
||||
Version: 4.15
|
||||
Release: 10%{?dist}
|
||||
Release: 10%{?dist}.1
|
||||
Summary: The Squid proxy caching server
|
||||
Epoch: 7
|
||||
# See CREDITS for breakdown of non GPLv2+ code
|
||||
@ -69,6 +69,9 @@ Patch310: squid-4.15-CVE-2023-50269.patch
|
||||
Patch311: squid-4.15-CVE-2024-25617.patch
|
||||
# https://bugzilla.redhat.com/show_bug.cgi?id=2268366
|
||||
Patch312: squid-4.15-CVE-2024-25111.patch
|
||||
# Regression caused by squid-4.15-CVE-2023-46846.patch
|
||||
# Upstream PR: https://github.com/squid-cache/squid/pull/1914
|
||||
Patch313: squid-4.15-ignore-wsp-after-chunk-size.patch
|
||||
|
||||
|
||||
Requires: bash >= 2.0
|
||||
@ -147,7 +150,7 @@ lookup program (dnsserver), a program for retrieving FTP data
|
||||
%patch310 -p1 -b .CVE-2023-50269
|
||||
%patch311 -p1 -b .CVE-2024-25617
|
||||
%patch312 -p1 -b .CVE-2024-25111
|
||||
|
||||
%patch313 -p1 -b .ignore-wsp-chunk-sz
|
||||
|
||||
# https://bugzilla.redhat.com/show_bug.cgi?id=1679526
|
||||
# Patch in the vendor documentation and used different location for documentation
|
||||
@ -364,6 +367,10 @@ fi
|
||||
|
||||
|
||||
%changelog
|
||||
* Mon Oct 14 2024 Luboš Uhliarik <luhliari@redhat.com> - 7:4.15-10.1
|
||||
- Resolves: RHEL-56024 - (Regression) Transfer-encoding:chunked data is not sent
|
||||
to the client in its complementary
|
||||
|
||||
* Tue Mar 19 2024 Luboš Uhliarik <luhliari@redhat.com> - 7:4.15-10
|
||||
- Resolves: RHEL-28529 - squid:4/squid: Denial of Service in HTTP Chunked
|
||||
Decoding (CVE-2024-25111)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user