Vulnerability Details

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

Published: 2016-05-12 12:26:49
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:N

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

Recommendations:
See the referenced vendor advisory for a solution.

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 Linux Distribution 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 Type:
Linux Distribution Package

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2015-1793

References:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150710-openssl
http://tools.cisco.com/security/center/viewAlert.x?alertId=39851

Severity
Medium
CVSS Score
6.4
Published
2016-05-12
Modified
2018-11-13
Category
CISCO

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