#VU51449 Infinite loop in pygments - CVE-2021-20270

Vulnerability identifier: #VU51449

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/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-2021-20270

CWE-ID: CWE-835

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
pygments
Other software / Other software solutions

Vendor: pygments

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop. A remote attacker can consume all available system resources and cause denial of service conditions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

pygments: 2.0 - 2.7.3

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External links
https://github.com/pygments/pygments/issues/1625
https://github.com/pygments/pygments/commit/f91804ff4772e3ab41f46e28d370f57898700333

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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.