Detections
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EulerOS 2.0 SP8 : python-pygments (EulerOS-SA-2021-1887)

high Nessus Plugin ID 149561

Synopsis

The remote EulerOS host is missing multiple security updates.

Description

According to the versions of the python-pygments packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

 - 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)

 - 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)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected python-pygments packages.

See Also

http://www.nessus.org/u?37c9c16e

Plugin Details

Severity: High

ID: 149561

File Name: EulerOS_SA-2021-1887.nasl

Version: 1.3

Type: local

Published: 5/18/2021

Updated: 1/1/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2021-27291

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:huawei:euleros:python2-pygments, p-cpe:/a:huawei:euleros:python3-pygments, cpe:/o:huawei:euleros:2.0

Required KB Items: Host/local_checks_enabled, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/sp

Excluded KB Items: Host/EulerOS/uvp_version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/18/2021

Reference Information

CVE: CVE-2021-20270, CVE-2021-27291