#VU32249 Buffer overflow in libgd - CVE-2016-6207

Vulnerability identifier: #VU32249

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-6207

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

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

Vendor: GD Software

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Integer overflow in the _gdContributionsAlloc function in gd_interpolation.c in GD Graphics Library (aka libgd) before 2.2.3 allows remote attackers to cause a denial of service (out-of-bounds memory write or memory consumption) via unspecified vectors.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libgd: 2.2.0 - 2.2.2

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External links
https://lists.opensuse.org/opensuse-updates/2016-08/msg00086.html
https://lists.opensuse.org/opensuse-updates/2016-09/msg00078.html
https://packetstormsecurity.com/files/138174/LibGD-2.2.2-Integer-Overflow-Denial-Of-Service.html
https://rhn.redhat.com/errata/RHSA-2016-2750.html
https://www.debian.org/security/2016/dsa-3630
https://www.securityfocus.com/archive/1/539100/100/0/threaded
https://www.securityfocus.com/bid/92080
https://www.securitytracker.com/id/1036535
https://www.ubuntu.com/usn/USN-3060-1
https://bugs.php.net/bug.php?id=72558
https://libgd.github.io/release-2.2.3.html
https://secunia.com/secunia_research/2016-9/
https://security.gentoo.org/glsa/201612-09

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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.