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Amazon Linux 2 : elfutils (ALAS-2023-2259)

medium Nessus Plugin ID 181705

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of elfutils installed on the remote host is prior to 0.176-2. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2023-2259 advisory.

 - The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off- by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks. (CVE-2020-21047)

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

Solution

Run 'yum update elfutils' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2023-2259.html

https://alas.aws.amazon.com/cve/html/CVE-2020-21047.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: Medium

ID: 181705

File Name: al2_ALAS-2023-2259.nasl

Version: 1.0

Type: local

Agent: unix

Published: 9/20/2023

Updated: 9/20/2023

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS Score Source: CVE-2020-21047

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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:amazon:linux:elfutils, p-cpe:/a:amazon:linux:elfutils-debuginfo, p-cpe:/a:amazon:linux:elfutils-default-yama-scope, p-cpe:/a:amazon:linux:elfutils-devel, p-cpe:/a:amazon:linux:elfutils-devel-static, p-cpe:/a:amazon:linux:elfutils-libelf, p-cpe:/a:amazon:linux:elfutils-libelf-devel, p-cpe:/a:amazon:linux:elfutils-libelf-devel-static, p-cpe:/a:amazon:linux:elfutils-libs, cpe:/o:amazon:linux:2

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 9/13/2023

Vulnerability Publication Date: 8/22/2023

Reference Information

CVE: CVE-2020-21047