#VU32384 Out-of-bounds read in Libxml2 - CVE-2015-7500

Vulnerability identifier: #VU32384

Vulnerability risk: Medium

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

CVE-ID: CVE-2015-7500

CWE-ID: CWE-125

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 gain access to potentially sensitive information.

The vulnerability exists due to a boundary error in the xmlParseMisc function in parser.c. A remote attacker can create unspecified vectors related to incorrect entities boundaries and start tags, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the 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/bulletinjan2016-2867206.html
https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
https://www.securityfocus.com/bid/79562
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=1281943
https://git.gnome.org/browse/libxml2/commit/?id=f1063fdbe7fa66332bbb76874101c2a7b51b519f
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.