CVE-2024-2379
QUIC certificate check bypass with wolfSSL
Project curl Security Advisory, March 27 2024 - Permalink
VULNERABILITY
libcurl skips the certificate verification for a QUIC connection under certain conditions, when built to use wolfSSL. If told to use an unknown/bad cipher or curve, the error path accidentally skips the verification and returns OK, thus ignoring any certificate problems.
INFO
To trigger, this issue also requires that the used wolfSSL library was built with the OPENSSL_COMPATIBLE_DEFAULTS symbol set, which is not set for the recommended configure --enable-curl builds.
The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2024-2379 to this issue.
CWE-295: Improper Certificate Validation
Severity: Low
AFFECTED VERSIONS
- Affected versions: curl 8.6.0 to and including 8.6.0
- Not affected versions: curl < 8.6.0 and >= 8.7.0
- Introduced-in: https://github.com/curl/curl/commit/5d044ad9480a9f556f4b6a2
libcurl is used by many applications, but not always advertised as such!
This flaw is also accessible using the curl command line tool.
SOLUTION
Starting in curl 8.7.0, this mistake is fixed.
RECOMMENDATIONS
A - Upgrade curl to version 8.7.0
B - Apply the patch to your local version
C - Avoid using HTTP/3 with curl built to use wolfSSL
TIMELINE
This issue was reported to the curl project on March 10, 2024. We contacted distros@openwall on March 19, 2024.
curl 8.7.0 was released on March 27 2024 around 07:00 UTC, coordinated with the publication of this advisory.
The curl security team is not aware of any active exploits using this vulnerability.
CREDITS
- Reported-by: Dexter Gerig
- Patched-by: Daniel Stenberg
Thanks a lot!