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samba: Security Advisory - CVE-2013-4124

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Integer overflow in the read_nttrans_ea_list function in nttrans.c in
smbd in Samba 3.x before 3.5.22, 3.6.x before 3.6.17, and 4.x before
4.0.8 allows remote attackers to cause a denial of service (memory
consumption) via a malformed packet.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-4124

Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
Signed-off-by: Chong Lu <Chong.Lu@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
This commit is contained in:
Chong.Lu@windriver.com
2014-06-13 14:12:57 +08:00
committed by Martin Jansa
parent fe32c95ab0
commit 69e765c464
2 changed files with 44 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta-oe/recipes-connectivity/samba/samba/samba-3.6.16-CVE-2013-4124.patch
+43
View File
@@ -0,0 +1,43 @@
Upstream-Status: Backport
From efdbcabbe97a594572d71d714d258a5854c5d8ce Mon Sep 17 00:00:00 2001
From: Jeremy Allison <jra@samba.org>
Date: Wed, 10 Jul 2013 17:10:17 -0700
Subject: [PATCH] Fix bug #10010 - Missing integer wrap protection in EA list
reading can cause server to loop with DOS.
Ensure we never wrap whilst adding client provided input.
CVE-2013-4124
Signed-off-by: Jeremy Allison <jra@samba.org>
---
source3/smbd/nttrans.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/source3/smbd/nttrans.c b/source3/smbd/nttrans.c
index ea9d417..5fc3a09 100644
--- a/source3/smbd/nttrans.c
+++ b/source3/smbd/nttrans.c
@@ -989,7 +989,19 @@ struct ea_list *read_nttrans_ea_list(TALLOC_CTX *ctx, const char *pdata, size_t
if (next_offset == 0) {
break;
}
+
+ /* Integer wrap protection for the increment. */
+ if (offset + next_offset < offset) {
+ break;
+ }
+
offset += next_offset;
+
+ /* Integer wrap protection for while loop. */
+ if (offset + 4 < offset) {
+ break;
+ }
+
}
return ea_list_head;
--
1.7.10.4
meta-oe/recipes-connectivity/samba/samba_3.6.8.bb
+1
View File
@@ -33,6 +33,7 @@ SRC_URI += "\
file://samba-3.6.22-CVE-2013-4496.patch;patchdir=.. \
file://0001-PIDL-fix-parsing-linemarkers-in-preprocessor-output.patch;patchdir=.. \
file://samba-3.6.11-CVE-2013-0213-CVE-2013-0214.patch;patchdir=.. \
file://samba-3.6.16-CVE-2013-4124.patch;patchdir=.. \
"
SRC_URI[md5sum] = "fbb245863eeef2fffe172df779a217be"
SRC_URI[sha256sum] = "4f5a171a8d902c6b4f822ed875c51eb8339196d9ccf0ecd7f6521c966b3514de"