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Ubuntu 21.04 : Ruby vulnerability (USN-4922-2)

high Nessus Plugin ID 148991

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 21.04 host has packages installed that are affected by a vulnerability as referenced in the USN-4922-2 advisory.

 - The REXML gem before 3.2.5 in Ruby before 2.6.7, 2.7.x before 2.7.3, and 3.x before 3.0.1 does not properly address XML round-trip issues. An incorrect document can be produced after parsing and serializing. (CVE-2021-28965)

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 libruby2.7, ruby2.7 and / or ruby2.7-dev packages.

See Also

https://ubuntu.com/security/notices/USN-4922-2

Plugin Details

Severity: High

ID: 148991

File Name: ubuntu_USN-4922-2.nasl

Version: 1.4

Type: local

Agent: unix

Published: 4/26/2021

Updated: 1/17/2023

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, 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:P/A:N

CVSS Score Source: CVE-2021-28965

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:H/A:N

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:21.04, p-cpe:/a:canonical:ubuntu_linux:libruby2.7, p-cpe:/a:canonical:ubuntu_linux:ruby2.7, p-cpe:/a:canonical:ubuntu_linux:ruby2.7-dev

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/26/2021

Vulnerability Publication Date: 4/21/2021

Reference Information

CVE: CVE-2021-28965

USN: 4922-2