#VU89742 Heap-based buffer overflow in Libxml2 - CVE-2015-8806

Vulnerability identifier: #VU89742

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-8806

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 cause a denial of service.

The vulnerability exists due to a boundary error. A remote attacker can cause a denial of service (heap-based buffer over-read and application crash) via an unexpected character immediately after the " substring in a crafted HTML document.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability..

Vulnerable software versions

Libxml2: before 2.9.4

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External links
https://www.openwall.com/lists/oss-security/2016/02/03/5
https://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
https://www.securityfocus.com/bid/82071
https://www.ubuntu.com/usn/USN-2994-1
https://bugzilla.gnome.org/show_bug.cgi?id=749115
https://security.gentoo.org/glsa/201701-37
https://www.debian.org/security/2016/dsa-3593

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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.