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Cisco NX-OS: OpenSSL Alternative Chains Certificate Forgery Vulnerability (July 2015) Affecting Cisco Products

Information

Severity

Severity

Medium

Family

Family

CISCO

CVSSv2 Base

CVSSv2 Base

6.4

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:N

Solution Type

Solution Type

Vendor Patch

Created

Created

6 years ago

Modified

Modified

4 years ago

Summary

On July 9, 2015, the OpenSSL Project released a security advisory detailing a vulnerability affecting applications that verify certificates, including SSL/Transport Layer Security (TLS)/Datagram Transport Layer Security (DTLS) clients and SSL/TLS/DTLS servers using client authentication. Multiple Cisco products incorporate a version of the OpenSSL package affected by this vulnerability that could allow an unauthenticated, remote attacker to cause certain checks on untrusted certificates to be bypassed, enabling the attacker to forge `trusted` certificates that could be used to conduct man-in-the-middle attacks. This advisory will be updated as additional information becomes available. Cisco will release free software updates that address this vulnerability. Workarounds that mitigate this vulnerability may be available.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

See the referenced vendor advisory for a solution.

Common Vulnerabilities and Exposures (CVE)