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Ubuntu 18.04 LTS / 20.04 LTS : python-py vulnerability (USN-5138-1)

high Nessus Plugin ID 155162

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5138-1 advisory.

 The py.path.svnwc component of py (aka python-py) through v1.9.0 contains

 a regular expression with an ambiguous subpattern that is susceptible to

 catastrophic backtracing. This could be used by attackers to cause a compute-time

 denial of service attack by supplying malicious input to the blame functionality.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected pypy-py, python-py and / or python3-py packages.

See Also

https://ubuntu.com/security/notices/USN-5138-1

Plugin Details

Severity: High

ID: 155162

File Name: ubuntu_USN-5138-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 11/11/2021

Updated: 8/27/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-29651

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:python3-py, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:python-py, p-cpe:/a:canonical:ubuntu_linux:pypy-py

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 11/10/2021

Vulnerability Publication Date: 12/9/2020

Reference Information

CVE: CVE-2020-29651

USN: 5138-1