Heap-based buffer overflow in gd (Alpine package)

Published: 2016-10-21

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2016-7568
CWE-ID	CWE-190 CWE-122
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	gd (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Heap-based buffer overflow

EUVDB-ID: #VU1003

Risk: Low

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:Clear]

CVE-ID: CVE-2016-7568

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

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

Install update from vendor's website.

Vulnerable software versions

gd (Alpine package): 2.2.3-r0 - 2.2.3-r1

CPE2.3

External links

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.