Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : Python vulnerabilities (USN-3817-1)

critical Nessus Plugin ID 118954

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Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

It was discovered that Python incorrectly handled large amounts of data. A remote attacker could use this issue to cause Python to crash, resulting in a denial of service, or possibly execute arbitrary code.
This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
(CVE-2018-1000030)

It was discovered that Python incorrectly handled running external commands in the shutil module. A remote attacker could use this issue to cause Python to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-1000802)

It was discovered that Python incorrectly used regular expressions vulnerable to catastrophic backtracking. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2018-1060, CVE-2018-1061)

It was discovered that Python failed to initialize Expat's hash salt.
A remote attacker could possibly use this issue to cause hash collisions, leading to a denial of service. (CVE-2018-14647).

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

Solution

Update the affected packages.

See Also

https://usn.ubuntu.com/3817-1/

Plugin Details

Severity: Critical

ID: 118954

File Name: ubuntu_USN-3817-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 11/14/2018

Updated: 4/9/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:python2.7, p-cpe:/a:canonical:ubuntu_linux:python2.7-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.4, p-cpe:/a:canonical:ubuntu_linux:python3.4-minimal, p-cpe:/a:canonical:ubuntu_linux:python3.5, p-cpe:/a:canonical:ubuntu_linux:python3.5-minimal, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/13/2018

Vulnerability Publication Date: 2/8/2018

Reference Information

CVE: CVE-2018-1000030, CVE-2018-1000802, CVE-2018-1060, CVE-2018-1061, CVE-2018-14647

USN: 3817-1