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Ubuntu 16.04 LTS / 18.04 LTS : Python 2.7 vulnerability (USN-4754-4)

critical Nessus Plugin ID 147995

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4754-4 advisory.

 - Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf is used unsafely. (CVE-2021-3177)

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 packages.

See Also

https://ubuntu.com/security/notices/USN-4754-4

Plugin Details

Severity: Critical

ID: 147995

File Name: ubuntu_USN-4754-4.nasl

Version: 1.4

Type: local

Agent: unix

Published: 3/23/2021

Updated: 10/21/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

CVSS Score Source: CVE-2021-3177

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:idle-python2.7, p-cpe:/a:canonical:ubuntu_linux:libpython2.7, p-cpe:/a:canonical:ubuntu_linux:libpython2.7-dev, p-cpe:/a:canonical:ubuntu_linux:libpython2.7-minimal, p-cpe:/a:canonical:ubuntu_linux:libpython2.7-stdlib, p-cpe:/a:canonical:ubuntu_linux:libpython2.7-testsuite, p-cpe:/a:canonical:ubuntu_linux:python2.7, p-cpe:/a:canonical:ubuntu_linux:python2.7-dev, p-cpe:/a:canonical:ubuntu_linux:python2.7-examples, p-cpe:/a:canonical:ubuntu_linux:python2.7-minimal

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/3/2021

Vulnerability Publication Date: 1/19/2021

Reference Information

CVE: CVE-2021-3177

USN: 4754-4