#VU37876 Buffer overflow in OptiPNG - CVE-2017-16938

Vulnerability identifier: #VU37876

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-16938

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OptiPNG
Other software / Other software solutions

Vendor: cosmin

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

A global buffer overflow in OptiPNG 0.7.6 allows remote attackers to cause a denial-of-service attack or other unspecified impact with a maliciously crafted GIF format file, related to an uncontrolled loop in the LZWReadByte function of the gifread.c file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OptiPNG: 0.7.6

---

External links
https://lists.debian.org/debian-lts-announce/2017/11/msg00042.html
https://security.gentoo.org/glsa/201801-02
https://sourceforge.net/p/optipng/bugs/69/
https://www.debian.org/security/2017/dsa-4058

---

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.