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From 68ff1beb43bb3d4d8838f3285c97023d1e50513a Mon Sep 17 00:00:00 2001
From: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>
Date: Fri, 15 May 2015 17:17:03 +0000
Subject: [PATCH] Fix buffer overflow for named recursive back reference when
the name is duplicated.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Upstream commit ported to pcre-8.37:
commit 4b79af6b4cbeb5326ae5e4d83f3e935e00286c19
Author: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>
Date: Fri May 15 17:17:03 2015 +0000
Fix buffer overflow for named recursive back reference when the name is
duplicated.
git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1558 2f5784b3-3f2a-0410-8824-cb99058d5e15
This fixes CVE-2015-3210.
Signed-off-by: Petr Písař <ppisar@redhat.com>
---
pcre_compile.c | 16 ++++++++++++++--
testdata/testinput2 | 2 ++
testdata/testoutput2 | 2 ++
3 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/pcre_compile.c b/pcre_compile.c
index 0efad26..6f06912 100644
--- a/pcre_compile.c
+++ b/pcre_compile.c
@@ -7173,14 +7173,26 @@ for (;; ptr++)
number. If the name is not found, set the value to 0 for a forward
reference. */
+ recno = 0;
ng = cd->named_groups;
for (i = 0; i < cd->names_found; i++, ng++)
{
if (namelen == ng->length &&
STRNCMP_UC_UC(name, ng->name, namelen) == 0)
- break;
+ {
+ open_capitem *oc;
+ recno = ng->number;
+ if (is_recurse) break;
+ for (oc = cd->open_caps; oc != NULL; oc = oc->next)
+ {
+ if (oc->number == recno)
+ {
+ oc->flag = TRUE;
+ break;
+ }
+ }
+ }
}
- recno = (i < cd->names_found)? ng->number : 0;
/* Count named back references. */
diff --git a/testdata/testinput2 b/testdata/testinput2
index 58fe53b..83bb471 100644
--- a/testdata/testinput2
+++ b/testdata/testinput2
@@ -4152,4 +4152,6 @@ backtracking verbs. --/
/((?2){73}(?2))((?1))/
+"(?J)(?'d'(?'d'\g{d}))"
+
/-- End of testinput2 --/
diff --git a/testdata/testoutput2 b/testdata/testoutput2
index b718df0..7dff52a 100644
--- a/testdata/testoutput2
+++ b/testdata/testoutput2
@@ -14423,4 +14423,6 @@ Failed: lookbehind assertion is not fixed length at offset 17
/((?2){73}(?2))((?1))/
+"(?J)(?'d'(?'d'\g{d}))"
+
/-- End of testinput2 --/
--
2.4.3
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