#VU53320 Out-of-bounds read in DjVuLibre - CVE-2021-32492

Vulnerability identifier: #VU53320

Vulnerability risk: Medium

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

CVE-ID: CVE-2021-32492

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
DjVuLibre
Client/Desktop applications / Multimedia software

Vendor: DjVu

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in DJVU::DataPool::has_data() function. A remote attacker can create a specially crafted djvu file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the 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.