Vulnerability identifier: #VU1003

Vulnerability risk: Low

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-2016-7568

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GD Graphics Library
Universal components / Libraries / Libraries used by multiple products

Vendor: Boutell.Com, Inc.

Description
The vulnerability allows a remote unauthenticated user to cause DoS conditions on the target system.
The weakness is due to integer overflow in the gdImageWebpCtx function in gd_webp.c in the GD Graphics Library (aka libgd). By performing a specially crafted imagewebp and imagedestroy calls, attackers can trigger a heap-based buffer overflow that lets them induce denial of service or execute arbitrary code.
Successful exploitation of the vulnerability results in denial of service or arbitrary code execution on the vulnerable system.

Mitigation
Update to version 2.1.0-5+deb8u7.

Vulnerable software versions

GD Graphics Library: 2.1.0-5+deb8u6 - 2.2.3-3

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External links
http://security-tracker.debian.org/tracker/CVE-2016-7568

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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.