#VU80613 Out-of-bounds read in libjpeg-turbo - CVE-2021-29390

Vulnerability identifier: #VU80613

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-29390

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libjpeg-turbo
Client/Desktop applications / Multimedia software

Vendor: The libjpeg-turbo 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 decompress_smooth_data() function in jdcoefct.c. A remote attacker can pass specially crafted image to the application and perform a denial of service attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libjpeg-turbo: 2.0.90

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1943797
https://github.com/libjpeg-turbo/libjpeg-turbo/blob/4e52b66f342a803d3b8099b79607e3158d3a241c/jdcoefct.c#L595
https://github.com/libjpeg-turbo/libjpeg-turbo/commits/main/jdcoefct.c

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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.