Vulnerability · Published Feb 3, 2024 · Assigned by curl
CVE-2024-0853OCSP verification bypass with TLS session reuse
Medium 5.3
In plain English
A medium-severity security flaw in curl from curl. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)1.1%top 34.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
curl inadvertently kept the SSL session ID for connections in its cache even when the verify status (*OCSP stapling*) test failed. A subsequent transfer to the same hostname could then succeed if the session ID cache was still fresh, which then skipped the verify status check.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | curl | 8.6.0-r0 | ALPINE-CVE-2024-0853 |
| Alpine:v3.21 | curl | 8.6.0-r0 | ALPINE-CVE-2024-0853 |
| Alpine:v3.22 | curl | 8.6.0-r0 | ALPINE-CVE-2024-0853 |
| Alpine:v3.23 | curl | 8.6.0-r0 | ALPINE-CVE-2024-0853 |
| Alpine:v3.24 | curl | 8.6.0-r0 | ALPINE-CVE-2024-0853 |
| Debian:13 | curl | 8.6.0-1 | DEBIAN-CVE-2024-0853 |
| Debian:14 | curl | 8.6.0-1 | DEBIAN-CVE-2024-0853 |
| Ubuntu:24.04:LTS | curl | 8.5.0-2ubuntu2 | UBUNTU-CVE-2024-0853 |