Amazon Linux 2023 : curl, curl-minimal, libcurl (ALAS2023-2024-596)

high Nessus Plugin ID 194487

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2024-596 advisory.

- When a protocol selection parameter option disables all protocols without adding any then the default set of protocols would remain in the allowed set due to an error in the logic for removing protocols. The below command would perform a request to curl.se with a plaintext protocol which has been explicitly disabled. curl --proto -all,-http http://curl.se The flaw is only present if the set of selected protocols disables the entire set of available protocols, in itself a command with no practical use and therefore unlikely to be encountered in real situations. The curl security team has thus assessed this to be low severity bug. (CVE-2024-2004)

- When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the push surpasses the maximum allowed limit (1000), libcurl aborts the server push. When aborting, libcurl inadvertently does not free all the previously allocated headers and instead leaks the memory.
Further, this error condition fails silently and is therefore not easily detected by an application.
(CVE-2024-2398)

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

Solution

Run 'dnf update curl --releasever 2023.4.20240429' to update your system.

Plugin Details

Severity: High

ID: 194487

File Name: al2023_ALAS2023-2024-596.nasl

Version: 1.2

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 4/29/2024

Updated: 7/26/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2024-2004

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

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

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

CVSS Score Source: CVE-2024-2398

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libcurl, p-cpe:/a:amazon:linux:libcurl-devel, p-cpe:/a:amazon:linux:curl-debuginfo, p-cpe:/a:amazon:linux:curl-debugsource, p-cpe:/a:amazon:linux:curl-minimal, p-cpe:/a:amazon:linux:curl-minimal-debuginfo, p-cpe:/a:amazon:linux:libcurl-debuginfo, p-cpe:/a:amazon:linux:libcurl-minimal-debuginfo, p-cpe:/a:amazon:linux:libcurl-minimal, p-cpe:/a:amazon:linux:curl, cpe:/o:amazon:linux:2023

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/25/2024

Vulnerability Publication Date: 3/27/2024

Reference Information

CVE: CVE-2024-2004, CVE-2024-2398

IAVA: 2024-A-0185-S

Detections

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