#VU87206 Memory leak in GIFLIB - CVE-2021-40633

Vulnerability identifier: #VU87206

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/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-2021-40633

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GIFLIB
Client/Desktop applications / Multimedia software

Vendor: GIFLIB Project

Description
The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak within the gif2rgb() function in util/gif2rgb.c. A remote attacker can force the application to leak memory and perform denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GIFLIB: 5.0.0 - 5.2.1

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External links
https://sourceforge.net/p/giflib/bugs/157/

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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.