OCSP stapling bypass with GnuTLS
When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it might fail to detect some OCSP problems and instead wrongly consider the response as fine. If the returned status reports another error than "revoked" (like for example "unauthorized") it is not treated as a bad certificate.
02 / AFFECTED SOFTWARE
Affected packages
85 explicit affected versions
174 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it might fail to detect some OCSP problems and instead wrongly consider the response as fine. If the returned status reports another error than "revoked" (like for example "unauthorized") it is not treated as a bad certificate.
When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it might fail to detect some OCSP problems and instead wrongly consider the response as fine. If the returned status reports another error than 'revoked' (like for example 'unauthorized') it is not treated as a bad certficate.
05 / REFERENCES
Further evidence
- http://www.openwall.com/lists/oss-security/2024/09/11/1
- https://curl.se/docs/CVE-2024-8096.html
- https://curl.se/docs/CVE-2024-8096.json
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/8xxx/CVE-2024-8096.json
- https://hackerone.com/reports/2669852
- https://lists.debian.org/debian-lts-announce/2024/11/msg00008.html
- https://nvd.nist.gov/vuln/detail/CVE-2024-8096
- https://security.netapp.com/advisory/ntap-20241011-0005/