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pcre2/pcre2-10.33-Implement-a-check-on-the-number-of-capturing-parenth.patch
Petr Písař 78199ab566 Validate number of capturing parentheses
2019-05-06 13:19:54 +02:00

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From a38f1e7eb827408133178ffac9987157d82edaa2 Mon Sep 17 00:00:00 2001
From: ph10 <ph10@6239d852-aaf2-0410-a92c-79f79f948069>
Date: Mon, 22 Apr 2019 12:39:38 +0000
Subject: [PATCH] Implement a check on the number of capturing parentheses,
which for some reason has never existed. This fixes ClusterFuzz issue 14376.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
git-svn-id: svn://vcs.exim.org/pcre2/code/trunk@1088 6239d852-aaf2-0410-a92c-79f79f948069
Petr Pisar: Ported to 10.33.
src/pcre2.h.in | 1 +
src/pcre2_compile.c | 12 +++++++++++-
src/pcre2_error.c | 1 +
testdata/testinput11 | 2 ++
testdata/testinput2 | 4 ++++
testdata/testinput9 | 2 ++
testdata/testoutput11-16 | 3 +++
testdata/testoutput11-32 | 2 ++
testdata/testoutput2 | 6 ++++++
testdata/testoutput9 | 3 +++
diff --git a/src/pcre2.h.in b/src/pcre2.h.in
index 9415d70..29f3688 100644
--- a/src/pcre2.h.in
+++ b/src/pcre2.h.in
@@ -305,6 +305,7 @@ pcre2_pattern_convert(). */
#define PCRE2_ERROR_INVALID_HYPHEN_IN_OPTIONS 194
#define PCRE2_ERROR_ALPHA_ASSERTION_UNKNOWN 195
#define PCRE2_ERROR_SCRIPT_RUN_NOT_AVAILABLE 196
+#define PCRE2_ERROR_TOO_MANY_CAPTURES 197
/* "Expected" matching error codes: no match and partial match. */
diff --git a/src/pcre2_compile.c b/src/pcre2_compile.c
index 068735a..cd6fbea 100644
--- a/src/pcre2_compile.c
+++ b/src/pcre2_compile.c
@@ -781,7 +781,7 @@ enum { ERR0 = COMPILE_ERROR_BASE,
ERR61, ERR62, ERR63, ERR64, ERR65, ERR66, ERR67, ERR68, ERR69, ERR70,
ERR71, ERR72, ERR73, ERR74, ERR75, ERR76, ERR77, ERR78, ERR79, ERR80,
ERR81, ERR82, ERR83, ERR84, ERR85, ERR86, ERR87, ERR88, ERR89, ERR90,
- ERR91, ERR92, ERR93, ERR94, ERR95, ERR96 };
+ ERR91, ERR92, ERR93, ERR94, ERR95, ERR96, ERR97 };
/* This is a table of start-of-pattern options such as (*UTF) and settings such
as (*LIMIT_MATCH=nnnn) and (*CRLF). For completeness and backward
@@ -3611,6 +3611,11 @@ while (ptr < ptrend)
nest_depth++;
if ((options & PCRE2_NO_AUTO_CAPTURE) == 0)
{
+ if (cb->bracount >= MAX_GROUP_NUMBER)
+ {
+ errorcode = ERR97;
+ goto FAILED;
+ }
cb->bracount++;
*parsed_pattern++ = META_CAPTURE | cb->bracount;
}
@@ -4435,6 +4440,11 @@ while (ptr < ptrend)
/* We have a name for this capturing group. It is also assigned a number,
which is its primary means of identification. */
+ if (cb->bracount >= MAX_GROUP_NUMBER)
+ {
+ errorcode = ERR97;
+ goto FAILED;
+ }
cb->bracount++;
*parsed_pattern++ = META_CAPTURE | cb->bracount;
nest_depth++;
diff --git a/src/pcre2_error.c b/src/pcre2_error.c
index 1d02cf1..5517e74 100644
--- a/src/pcre2_error.c
+++ b/src/pcre2_error.c
@@ -184,6 +184,7 @@ static const unsigned char compile_error_texts[] =
/* 95 */
"(*alpha_assertion) not recognized\0"
"script runs require Unicode support, which this version of PCRE2 does not have\0"
+ "too many capturing groups (maximum 65535)\0"
;
/* Match-time and UTF error texts are in the same format. */
diff --git a/testdata/testinput11 b/testdata/testinput11
index 2d267d6..fca6042 100644
--- a/testdata/testinput11
+++ b/testdata/testinput11
@@ -368,4 +368,6 @@
ab<61>Az
ab\x{80000041}z
+/\[()]{65535}/expand
+
# End of testinput11
diff --git a/testdata/testinput2 b/testdata/testinput2
index 9e59b62..8a98f94 100644
--- a/testdata/testinput2
+++ b/testdata/testinput2
@@ -5587,4 +5587,8 @@ a)"xI
\= Expect error message
abc\=null_context
+/\[()]{65535}()/expand
+
+/\[()]{65535}(?<A>)/expand
+
# End of testinput2
diff --git a/testdata/testinput9 b/testdata/testinput9
index 7be4b15..792d610 100644
--- a/testdata/testinput9
+++ b/testdata/testinput9
@@ -260,4 +260,6 @@
/(*:*++++++++++++''''''''''''''''''''+''+++'+++x+++++++++++++++++++++++++++++++++++(++++++++++++++++++++:++++++%++:''''''''''''''''''''''''+++++++++++++++++++++++++++++++++++++++++++++++++++++-++++++++k+++++++''''+++'+++++++++++++++++++++++''''++++++++++++':ƿ)/
+/\[()]{65535}/expand
+
# End of testinput9
diff --git a/testdata/testoutput11-16 b/testdata/testoutput11-16
index 78bf7fb..f2b9637 100644
--- a/testdata/testoutput11-16
+++ b/testdata/testoutput11-16
@@ -661,4 +661,7 @@ Subject length lower bound = 1
ab<61>Az
ab\x{80000041}z
+/\[()]{65535}/expand
+Failed: error 120 at offset 131070: regular expression is too large
+
# End of testinput11
diff --git a/testdata/testoutput11-32 b/testdata/testoutput11-32
index 4b00384..1908ab7 100644
--- a/testdata/testoutput11-32
+++ b/testdata/testoutput11-32
@@ -667,4 +667,6 @@ Subject length lower bound = 1
ab\x{80000041}z
0: ab\x{80000041}z
+/\[()]{65535}/expand
+
# End of testinput11
diff --git a/testdata/testoutput2 b/testdata/testoutput2
index 2f91c38..158fbad 100644
--- a/testdata/testoutput2
+++ b/testdata/testoutput2
@@ -16934,6 +16934,12 @@ Subject length lower bound = 0
abc\=null_context
** Replacement callouts are not supported with null_context.
+/\[()]{65535}()/expand
+Failed: error 197 at offset 131071: too many capturing groups (maximum 65535)
+
+/\[()]{65535}(?<A>)/expand
+Failed: error 197 at offset 131075: too many capturing groups (maximum 65535)
+
# End of testinput2
Error -70: PCRE2_ERROR_BADDATA (unknown error number)
Error -62: bad serialized data
diff --git a/testdata/testoutput9 b/testdata/testoutput9
index f98f276..f66ca3d 100644
--- a/testdata/testoutput9
+++ b/testdata/testoutput9
@@ -367,4 +367,7 @@ Failed: error 134 at offset 14: character code point value in \x{} or \o{} is to
/(*:*++++++++++++''''''''''''''''''''+''+++'+++x+++++++++++++++++++++++++++++++++++(++++++++++++++++++++:++++++%++:''''''''''''''''''''''''+++++++++++++++++++++++++++++++++++++++++++++++++++++-++++++++k+++++++''''+++'+++++++++++++++++++++++''''++++++++++++':ƿ)/
Failed: error 176 at offset 259: name is too long in (*MARK), (*PRUNE), (*SKIP), or (*THEN)
+/\[()]{65535}/expand
+Failed: error 120 at offset 131070: regular expression is too large
+
# End of testinput9
--
2.20.1
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