#VU93876 Out-of-bounds read in GIFLIB - CVE-2020-23922

Vulnerability identifier: #VU93876

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-23922

CWE-ID: CWE-125

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 a denial of service (DoS) attack.

The vulnerability exists due to heap-based buffer over-read within the DumpScreen2RGB() function in gif2rgb.c. A remote attacker can pass a specially crafted file to the application and perform a denial of service attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

GIFLIB: 5.1.0 - 5.1.4

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External links
https://sourceforge.net/p/giflib/bugs/151/
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E
https://cwe.mitre.org/data/definitions/126.html

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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.