Medium 6.4Published May 13, 2009

CVE-2009-0161The 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…

Updated under an hour ago (Nov 2, 2026, 12:23 AM ET)

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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.

CVSS: 6.4 MEDIUM (v2.0, NVD)AV:N/AC:L/Au:N/C:N/I:P/A:P
Weakness (CWE): CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

apple mac_os_x apple:mac_os_x	10.5.0; 10.5.1; 10.5.2; 10.5.3; 10.5.4; 10.5.5; 10.5.6	NVD
apple mac_os_x_server apple:mac_os_x_server	10.4.11; 10.5.0; 10.5.1; 10.5.2; 10.5.3; 10.5.4; 10.5.6	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.