#VU32383 Heap-based buffer overflow in Libxml2 - CVE-2015-7499

Vulnerability identifier: #VU32383

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-7499

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Libxml2
Universal components / Libraries / Libraries used by multiple products

Vendor: Gnome Development Team

Description

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

The vulnerability exists due to a boundary error in Heap-based buffer overflow in the xmlGROW function in parser.c in libxml2 before 2.9.3. A remote attacker can use unspecified vectors. to trigger heap-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

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External links
https://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html
https://lists.apple.com/archives/security-announce/2016/Mar/msg00001.html
https://lists.apple.com/archives/security-announce/2016/Mar/msg00002.html
https://lists.apple.com/archives/security-announce/2016/Mar/msg00004.html
https://lists.opensuse.org/opensuse-updates/2015-12/msg00120.html
https://lists.opensuse.org/opensuse-updates/2016-01/msg00031.html
https://marc.info/?l=bugtraq&m=145382616617563&w=2
https://rhn.redhat.com/errata/RHSA-2015-2549.html
https://rhn.redhat.com/errata/RHSA-2015-2550.html
https://rhn.redhat.com/errata/RHSA-2016-1089.html
https://www.debian.org/security/2015/dsa-3430
https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
https://www.securityfocus.com/bid/79509
https://www.securitytracker.com/id/1034243
https://www.ubuntu.com/usn/USN-2834-1
https://xmlsoft.org/news.html
https://bugzilla.redhat.com/show_bug.cgi?id=1281925
https://git.gnome.org/browse/libxml2/commit/?id=28cd9cb747a94483f4aea7f0968d202c20bb4cfc
https://git.gnome.org/browse/libxml2/commit/?id=35bcb1d758ed70aa7b257c9c3b3ff55e54e3d0da
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04944172
https://security.gentoo.org/glsa/201701-37
https://support.apple.com/HT206166
https://support.apple.com/HT206167
https://support.apple.com/HT206168
https://support.apple.com/HT206169

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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.