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Amazon Linux 2 : libmicrohttpd (ALAS-2023-2135)

medium Nessus Plugin ID 178528

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Synopsis

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

Description

The version of libmicrohttpd installed on the remote host is prior to 0.9.33-2. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2023-2135 advisory.

 - GNU libmicrohttpd before 0.9.76 allows remote DoS (Denial of Service) due to improper parsing of a multipart/form-data boundary in the postprocessor.c MHD_create_post_processor() method. This allows an attacker to remotely send a malicious HTTP POST packet that includes one or more '\0' bytes in a multipart/form-data boundary field, which - assuming a specific heap layout - will result in an out-of- bounds read and a crash in the find_boundary() function. (CVE-2023-27371)

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 libmicrohttpd' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2023-2135.html

https://alas.aws.amazon.com/cve/html/CVE-2023-27371.html

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

Plugin Details

Severity: Medium

ID: 178528

File Name: al2_ALAS-2023-2135.nasl

Version: 1.1

Type: local

Agent: unix

Published: 7/20/2023

Updated: 7/20/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.2

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

CVSS Score Source: CVE-2023-27371

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.3

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libmicrohttpd-debuginfo, p-cpe:/a:amazon:linux:libmicrohttpd-devel, p-cpe:/a:amazon:linux:libmicrohttpd, p-cpe:/a:amazon:linux:libmicrohttpd-doc, cpe:/o:amazon:linux:2

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/17/2023

Vulnerability Publication Date: 2/28/2023

Reference Information

CVE: CVE-2023-27371