OESA-2021-1154

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OESA-2021-1154

Summary: python-pygments security update

Details: Security Fix(es): 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.(CVE-2021-27291) An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the "exception" keyword.(CVE-2021-20270)

References: https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1154, https://nvd.nist.gov/vuln/detail/CVE-2021-27291, https://nvd.nist.gov/vuln/detail/CVE-2021-20270