#VU53321 Integer overflow in DjVuLibre - CVE-2021-32491

Vulnerability identifier: #VU53321

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/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-2021-32491

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
DjVuLibre
Client/Desktop applications / Multimedia software

Vendor: DjVu

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow within render() function in tools/ddjvu. A remote attacker can create a specially crafted djvu  file, trick the victim into opening it, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

DjVuLibre: 3.5.1 - 3.5.27

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External links
https://github.com/cloudfoundry/cflinuxfs3/releases/tag/0.238.0

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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.