CVE-2009-0161

Severity: medium (CVSS 6.4 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-05-13 · updated 2026-06-16
Weakness: CWE-20

Description

The OpenSSL::OCSP module for Ruby in Apple Mac OS X 10.5 before 10.5.7 misinterprets an unspecified invalid response as a successful OCSP certificate validation, which might allow remote attackers to spoof certificate authentication via a revoked certificate.

Affected products

macOS: 10.5.0, 10.5.1, 10.5.2, 10.5.3, 10.5.4, 10.5.5 (+1)
Apple Mac Os X Server: 10.4.11, 10.5.0, 10.5.1, 10.5.2, 10.5.3, 10.5.4 (+1)

References

http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
http://secunia.com/advisories/35074
http://support.apple.com/kb/HT3549
http://www.securityfocus.com/bid/34926
http://www.us-cert.gov/cas/techalerts/TA09-133A.html
http://www.vupen.com/english/advisories/2009/1297
https://exchange.xforce.ibmcloud.com/vulnerabilities/50592
http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
http://secunia.com/advisories/35074
http://support.apple.com/kb/HT3549
http://www.securityfocus.com/bid/34926
http://www.us-cert.gov/cas/techalerts/TA09-133A.html

Get alerted when CVE-2009-0161 or the next vulnerability affects your stack