Vulnerability Description
Mod_gnutls is a TLS module for Apache HTTPD based on GnuTLS. Versions from 0.9.0 to 0.12.0 (including) did not properly fail blocking read operations on TLS connections when the transport hit timeouts. Instead it entered an endless loop retrying the read operation, consuming CPU resources. This could be exploited for denial of service attacks. If trace level logging was enabled, it would also produce an excessive amount of log output during the loop, consuming disk space. The problem has been fixed in commit d7eec4e598158ab6a98bf505354e84352f9715ec, please update to version 0.12.1. There are no workarounds, users who cannot update should apply the errno fix detailed in the security advisory.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mod Gnutls Project | Mod Gnutls | >= 0.9.0, < 0.12.1 |
Related Weaknesses (CWE)
References
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942737#25ExploitIssue TrackingMailing List
- https://github.com/airtower-luna/mod_gnutls/commit/d7eec4e598158ab6a98bf505354e8Patch
- https://github.com/airtower-luna/mod_gnutls/security/advisories/GHSA-6cfv-fvgm-7PatchVendor Advisory
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942737#25ExploitIssue TrackingMailing List
- https://github.com/airtower-luna/mod_gnutls/commit/d7eec4e598158ab6a98bf505354e8Patch
- https://github.com/airtower-luna/mod_gnutls/security/advisories/GHSA-6cfv-fvgm-7PatchVendor Advisory
FAQ
What is CVE-2023-25824?
CVE-2023-25824 is a vulnerability with a CVSS score of 7.5 (HIGH). Mod_gnutls is a TLS module for Apache HTTPD based on GnuTLS. Versions from 0.9.0 to 0.12.0 (including) did not properly fail blocking read operations on TLS connections when the transport hit timeouts...
How severe is CVE-2023-25824?
CVE-2023-25824 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-25824?
Check the references section above for vendor advisories and patch information. Affected products include: Mod Gnutls Project Mod Gnutls.