src/patches/pcre-8.37-Fix-buffer-overflow-for-forward-reference-within-bac.patch

   1 From 354e1f8e921dcb9cf2f3a5eac93cd826d01a7d8a Mon Sep 17 00:00:00 2001
   2 From: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>
   3 Date: Tue, 23 Jun 2015 16:34:53 +0000
   4 Subject: [PATCH] Fix buffer overflow for forward reference within backward
   5  assertion with excess closing parenthesis. Bugzilla 1651.
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 This is upstream commit ported to 8.37:
  11
  12 commit 764692f9aea9eab50fdba6cb537441d8b34c6c37
  13 Author: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>
  14 Date:   Tue Jun 23 16:34:53 2015 +0000
  15
  16     Fix buffer overflow for forward reference within backward assertion with excess
  17     closing parenthesis. Bugzilla 1651.
  18
  19     git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1571 2f5784b3-3f2a-0410-8824-cb99058d5e15
  20
  21 It fixes CVE-2015-5073.
  22
  23 Signed-off-by: Petr Písař <ppisar@redhat.com>
  24 ---
  25  pcre_compile.c       | 2 +-
  26  testdata/testinput2  | 2 ++
  27  testdata/testoutput2 | 3 +++
  28  3 files changed, 6 insertions(+), 1 deletion(-)
  29
  30 diff --git a/pcre_compile.c b/pcre_compile.c
  31 index 6f06912..b66b1f6 100644
  32 --- a/pcre_compile.c
  33 +++ b/pcre_compile.c
  34 @@ -9392,7 +9392,7 @@ OP_RECURSE that are not fixed length get a diagnosic with a useful offset. The
  35  exceptional ones forgo this. We scan the pattern to check that they are fixed
  36  length, and set their lengths. */
  37
  38 -if (cd->check_lookbehind)
  39 +if (errorcode == 0 && cd->check_lookbehind)
  40    {
  41    pcre_uchar *cc = (pcre_uchar *)codestart;
  42
  43 diff --git a/testdata/testinput2 b/testdata/testinput2
  44 index 83bb471..5cc9ce6 100644
  45 --- a/testdata/testinput2
  46 +++ b/testdata/testinput2
  47 @@ -4154,4 +4154,6 @@ backtracking verbs. --/
  48
  49  "(?J)(?'d'(?'d'\g{d}))"
  50
  51 +/(?=di(?<=(?1))|(?=(.))))/
  52 +
  53  /-- End of testinput2 --/
  54 diff --git a/testdata/testoutput2 b/testdata/testoutput2
  55 index 7dff52a..4decb8d 100644
  56 --- a/testdata/testoutput2
  57 +++ b/testdata/testoutput2
  58 @@ -14425,4 +14425,7 @@ Failed: lookbehind assertion is not fixed length at offset 17
  59
  60  "(?J)(?'d'(?'d'\g{d}))"
  61
  62 +/(?=di(?<=(?1))|(?=(.))))/
  63 +Failed: unmatched parentheses at offset 23
  64 +
  65  /-- End of testinput2 --/
  66 --
  67 2.4.3
  68