Amazon Linux 2 : curl, --advisory ALAS2-2026-3173 (ALAS-2026-3173)

medium Nessus Plugin ID 299549

Synopsis

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

Description

The version of curl installed on the remote host is prior to 8.3.0-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3173 advisory.

curl's code for managing SSH connections when SFTP was done using the wolfSSH powered backend was flawed and missed host verification mechanisms.

This prevents curl from detecting MITM attackers and more. (CVE-2025-10966)

broken TLS options for threaded LDAPS

NOTE: https://curl.se/docs/CVE-2025-14017.htmlNOTE: Introduced with:
https://github.com/curl/curl/commit/ccba0d10b6baf5c73cae8cf4fb3f29f0f55c5a34 (curl-7_17_0)NOTE: Fixed by:
https://github.com/curl/curl/commit/39d1976b7f709a516e3243338ebc0443bdd8d56d (rc-8_18_0-1, curl-8_18_0)NOTE: Built with OpenLDAP (only affects the legacy LDAP support) (CVE-2025-14017)

bearer token leak on cross-protocol redirect

NOTE: https://curl.se/docs/CVE-2025-14524.htmlNOTE: Introduced with:
https://github.com/curl/curl/commit/06c1bea72faabb6fad4b7ef818aafaa336c9a7aa (curl-7_33_0)NOTE: Fixed by:
https://github.com/curl/curl/commit/1a822275d333dc6da6043497160fd04c8fa48640 (rc-8_18_0-2, curl-8_18_0) (CVE-2025-14524)

OpenSSL partial chain store policy bypass

NOTE: https://curl.se/docs/CVE-2025-14819.htmlNOTE: Introduced with:
https://github.com/curl/curl/commit/3c16697ebd796f799227be293e8689aec5f8190d (curl-7_87_0)NOTE: Fixed by:
https://github.com/curl/curl/commit/cd046f6c93b39d673a58c18648d8906e954c4f5d (rc-8_18_0-3, curl-8_18_0) (CVE-2025-14819)

libssh global knownhost override

NOTE: https://curl.se/docs/CVE-2025-15079.htmlNOTE: Introduced with:
https://github.com/curl/curl/commit/c92d2e14cfb0db662f958effd2ac86f995cf1b5a (curl-7_58_0)NOTE: Fixed by:
https://github.com/curl/curl/commit/adca486c125d9a6d9565b9607a19dce803a8b479 (rc-8_18_0-3, curl-8_18_0)NOTE: Debian builds with libssh2 for SSH backend (CVE-2025-15079)

libssh key passphrase bypass without agent set

NOTE: https://curl.se/docs/CVE-2025-15224.htmlNOTE: Introduced with:
https://github.com/curl/curl/commit/c92d2e14cfb0db662f958effd2ac86f995cf1b5a (curl-7_58_0)NOTE: Fixed by:
https://github.com/curl/curl/commit/16d5f2a5660c61cc27bd5f1c7f512391d1c927aa (curl-8_18_0)NOTE: Debian builds with libssh2 for SSH backend (CVE-2025-15224)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'yum update curl' or or 'yum update --advisory ALAS2-2026-3173' to update your system.

Plugin Details

Severity: Medium

ID: 299549

File Name: al2_ALAS-2026-3173.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 2/19/2026

Updated: 2/19/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.6

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

CVSS Score Source: CVE-2025-10966

CVSS v3

Risk Factor: Medium

Base Score: 6.3

Temporal Score: 5.7

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

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

CVSS Score Source: CVE-2025-14017

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libcurl, p-cpe:/a:amazon:linux:libcurl-devel, p-cpe:/a:amazon:linux:curl-debuginfo, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:curl

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: 2/19/2026

Vulnerability Publication Date: 11/6/2025

Reference Information

CVE: CVE-2025-10966, CVE-2025-14017, CVE-2025-14524, CVE-2025-14819, CVE-2025-15079, CVE-2025-15224

IAVA: 2025-A-0818-S, 2026-A-0005

Detections

Analytics