Cisco Prime Security Manager OpenSSL Alternative Chains Certificate Forgery (cisco-sa-20150710-openssl)

Medium Nessus Plugin ID 86105


The management application installed on the remote host is affected by a certificate authentication bypass vulnerability.


According to its self-reported version number, the version of Cisco Prime Security Manager installed on the remote host has a bundled version of OpenSSL that is affected by a certificate validation bypass vulnerability. The vulnerability exists due to a flaw in the X509_verify_cert() function in x509_vfy.c that is triggered when locating alternate certificate chains when the first attempt to build such a chain fails. A remote attacker can exploit this, by using a valid leaf certificate as a certificate authority (CA), to issue invalid certificates that will bypass authentication.


Upgrade to Cisco Prime Security Manager Build 11 or later.

See Also

Plugin Details

Severity: Medium

ID: 86105

File Name: cisco-sa-CSCuv26213-prsm.nasl

Version: 1.10

Type: remote

Family: CGI abuses

Published: 2015/09/23

Updated: 2019/11/22

Dependencies: 62181

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2015-1793

CVSS v2.0

Base Score: 6.4

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 6.5

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:cisco:prime_security_manager, cpe:/a:openssl:openssl

Required KB Items: installed_sw/Cisco PRSM

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2015/09/15

Vulnerability Publication Date: 2015/07/09

Reference Information

CVE: CVE-2015-1793

BID: 75652


CISCO-SA: cisco-sa-20150710-openssl