Improper Check for Certificate Revocation Affecting libcurl package, versions [8.5.0,8.6.0)


Severity

Recommended
0.0
low
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.16% (38th percentile)

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  • Snyk IDSNYK-CONAN-LIBCURL-10076473
  • published8 May 2025
  • disclosed31 Jan 2024
  • creditHiroki Kurosawa

Introduced: 31 Jan 2024

CVE-2024-0853  (opens in a new tab)
CWE-299  (opens in a new tab)

How to fix?

Upgrade libcurl to version 8.6.0 or higher.

Overview

Affected versions of this package are vulnerable to Improper Check for Certificate Revocation due to improper handling of SSL session IDs when an OCSP stapling test fails. An attacker can bypass OCSP verification and establish a secure connection using a previously cached session ID, which should have been invalidated.

Notes: The project maintainer recommend the following to avoid this vulnerability.

  1. Apply the patch to your local version

  2. Do not use curl built to use OpenSSL

  3. Do not allow TLS 1.2 for your transfers

CVSS Base Scores

version 3.1