#VU33630 Out-of-bounds read - CVE-2016-6161

Vulnerability identifier: #VU33630

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-2016-6161

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Description

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

The output function in gd_gif_out.c in the GD Graphics Library (aka libgd) allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted image.

Mitigation
Install update from vendor's website.

External links
https://lists.opensuse.org/opensuse-updates/2016-08/msg00086.html
https://lists.opensuse.org/opensuse-updates/2016-09/msg00078.html
https://www.debian.org/security/2016/dsa-3619
https://www.openwall.com/lists/oss-security/2016/07/05/6
https://www.openwall.com/lists/oss-security/2016/07/05/7
https://www.ubuntu.com/usn/USN-3030-1
https://github.com/libgd/libgd/issues/209

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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.