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CVE-2021-27291

Status Candidate

Overview

In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.

Related Files

Ubuntu Security Notice USN-4897-1
Posted Mar 31, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4897-1 - Ben Caller discovered that Pygments incorrectly handled parsing certain files. If a user or automated system were tricked into parsing a specially crafted file, a remote attacker could cause Pygments to hang or consume resources, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-27291
MD5 | da06c873044e900cf790a50e5d2b52d1
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