Vulnerability identifier: #VU89740

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-4447

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

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

Vendor:

Description

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists in xmlParseElementDecl function in parser.c in libxml2. A remote attacker can cause a denial of service (heap-based buffer underread and application crash) via a crafted file, involving xmlParseName.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://www.debian.org/security/2016/dsa-3593
http://www.ubuntu.com/usn/USN-2994-1
http://git.gnome.org/browse/libxml2/commit/?id=00906759053986b8079985644172085f74331f83
http://www.openwall.com/lists/oss-security/2016/05/25/2
http://xmlsoft.org/news.html
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.404722
http://access.redhat.com/errata/RHSA-2016:1292
http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html
http://support.apple.com/HT206904
http://support.apple.com/HT206899
http://support.apple.com/HT206902
http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.html
http://support.apple.com/HT206905
http://support.apple.com/HT206903
http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.html
http://support.apple.com/HT206901
http://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05194709
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.securityfocus.com/bid/90864
http://kc.mcafee.com/corporate/index?page=content&id=SB10170
http://www.tenable.com/security/tns-2016-18
http://www.securitytracker.com/id/1036348
http://rhn.redhat.com/errata/RHSA-2016-2957.html

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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.