Cisco Security Advisory
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AV:N/AC:M/Au:N/C:N/I:P/A:N/E:F/RL:U/RC:C
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A vulnerability in SSL certificate validation of multiple Cisco products could allow an unauthenticated, remote attacker to stage a man-in-the-middle attack.
The vulnerability is due to lack of SSL certificate validation for secure LDAP. An attacker could exploit this vulnerability to stage a man-in-the-middle attack when secure LDAP is enabled on an affected device. Successful exploitation could allow the attacker to access sensitive information.
Cisco has confirmed the vulnerability; however, software updates are not available.
To exploit this vulnerability, an attacker must be in a position in the network to conduct a man-in-the-middle attack between devices communicating with the targeted device. In addition, the attacker may need to acquire additional information about the device, such as whether secure LDAP is enabled on the device. This feature must be enabled for a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
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Cisco has released bug IDs CSCuo29561, CSCuv40466, and CSCuv40470 for registered users, which contain additional details and up-to-date lists of affected product versions.
Vulnerable Products
At the time this alert was first published, the following Cisco products and releases were vulnerable:
- Cisco Web Security Appliance (WSA) 8.5.0-000
- Cisco Email Security Appliance (ESA) 8.5.7-042
- Cisco Content Security Management Appliance (SMA) 8.3.6-048
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
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Software updates are not available.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.0 Multiple Cisco products contain a vulnerability that could allow an unauthenticated, remote attacker to conduct a man-in-the-middle attack. Updates are not available. NA Final 2015-Jul-24
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