Stack-based buffer overflow in Libxml2

1) Stack-based buffer overflow

EUVDB-ID: #VU32382

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-8242

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the xmlSAX2TextNode function in SAX2.c in the push interface in the HTML parser when processing crafted XML data. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update to version 2.9.3.

Vulnerable software versions

Libxml2: 2.9.0 - 2.9.2

External links

http://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html
http://lists.apple.com/archives/security-announce/2016/Mar/msg00001.html
http://lists.apple.com/archives/security-announce/2016/Mar/msg00002.html
http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.html
http://lists.opensuse.org/opensuse-updates/2015-12/msg00120.html
http://lists.opensuse.org/opensuse-updates/2016-01/msg00031.html
http://marc.info/?l=bugtraq&m=145382616617563&w=2
http://rhn.redhat.com/errata/RHSA-2015-2549.html
http://rhn.redhat.com/errata/RHSA-2015-2550.html
http://rhn.redhat.com/errata/RHSA-2016-1089.html
http://www.openwall.com/lists/oss-security/2015/11/17/5
http://www.openwall.com/lists/oss-security/2015/11/18/23
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.securityfocus.com/bid/77681
http://www.securitytracker.com/id/1034243
http://www.ubuntu.com/usn/USN-2834-1
http://xmlsoft.org/news.html
http://bugzilla.gnome.org/show_bug.cgi?id=756372
http://bugzilla.redhat.com/show_bug.cgi?id=1281950
http://git.gnome.org/browse/libxml2/commit/?id=8fb4a770075628d6441fb17a1e435100e2f3b1a2
http://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04944172
http://security.gentoo.org/glsa/201701-37
http://support.apple.com/HT206166
http://support.apple.com/HT206167
http://support.apple.com/HT206168
http://support.apple.com/HT206169

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.