Amazon Linux AMI : curl (ALAS-2021-1525)

low Nessus Plugin ID 153160

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Synopsis

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

Description

The version of curl installed on the remote host is prior to 7.61.1-12.99. It is, therefore, affected by a vulnerability as referenced in the ALAS-2021-1525 advisory.

 - libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse, if one of them matches the setup.Due to errors in the logic, the config matching function did not take 'issuercert' into account and it compared the involved paths *case insensitively*,which could lead to libcurl reusing wrong connections.File paths are, or can be, case sensitive on many systems but not all, and caneven vary depending on used file systems.The comparison also didn't include the 'issuer cert' which a transfer can setto qualify how to verify the server certificate. (CVE-2021-22924)

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 curl' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2021-1525.html

https://access.redhat.com/security/cve/CVE-2021-22924

Plugin Details

Severity: Low

ID: 153160

File Name: ala_ALAS-2021-1525.nasl

Version: 1.2

Type: local

Agent: unix

Published: 9/9/2021

Updated: 9/9/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 2.9

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2021-22924

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.2

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

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/2/2021

Vulnerability Publication Date: 7/24/2021

Reference Information

CVE: CVE-2021-22924

ALAS: 2021-1525