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Ubuntu 20.04 LTS / 22.04 LTS : libtirpc vulnerability (USN-5538-1)

high Nessus Plugin ID 163523

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5538-1 advisory.

 - In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtirpc because idle TCP connections are mishandled. This can, in turn, lead to an svc_run infinite loop without accepting new connections. (CVE-2021-46828)

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 libtirpc-common, libtirpc-dev and / or libtirpc3 packages.

See Also

https://ubuntu.com/security/notices/USN-5538-1

Plugin Details

Severity: High

ID: 163523

File Name: ubuntu_USN-5538-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 7/28/2022

Updated: 7/10/2023

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: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2021-46828

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: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libtirpc-common, p-cpe:/a:canonical:ubuntu_linux:libtirpc-dev, p-cpe:/a:canonical:ubuntu_linux:libtirpc3

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/28/2022

Vulnerability Publication Date: 7/20/2022

Reference Information

CVE: CVE-2021-46828

USN: 5538-1