Improper Restriction of Communication Channel to Intended Endpoints Affecting libcurl-devel package, versions <0:8.3.0-1.amzn2.0.13


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.48% (39th percentile)

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  • Snyk IDSNYK-AMZN2-LIBCURLDEVEL-20244525
  • published29 Sept 2026
  • disclosed6 Sept 2026

Introduced: 6 Sep 2026

NewCVE-2026-13608  (opens in a new tab)
CWE-923  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 libcurl-devel to version 0:8.3.0-1.amzn2.0.13 or higher.
This issue was patched in ALAS2-2026-3953.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl-devel package and not the libcurl-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A flaw in the libcurl SASL negotiation for LDAP authentication allows an incomplete handshake sequence to be misinterpreted as a successful cryptographic verification. An attacker executing a Man-in-the-Middle (MITM) attack can inject a premature or shortcut response that bypasses complete peer validation.

CVSS Base Scores

version 3.1