Cisco Security Advisory
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AV:N/AC:M/Au:N/C:N/I:N/A:P/E:F/RL:OF/RC:C
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A vulnerability in the Session Manager software of Cisco Packet Data Network Gateway (PGW) could allow an unauthenticated, remote attacker to cause the Session Manager to crash.
The issue is due to insufficient validation of received TCP packets. An attacker could exploit this issue by sending a crafted TCP packet. An exploit could allow the attacker to cause the Session Manager process to crash.
Cisco has confirmed the vulnerability in a security notice and released software updates.
To exploit this vulnerability, an attacker may need access to trusted, internal networks behind a firewall to send crafted TCP packets to the targeted device. This access requirement may reduce the likelihood of 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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Customers are advised to consult Cisco bug ID CSCuo21914 for a complete list of affected product versions.
Vulnerable Products
At the time this alert was first published, Cisco ASR 5000 Series Software Releases 11.0, 12.0, 12.1, 12.2, 14.0, and 15.0 were vulnerable. Later releases may also be vulnerable.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 apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
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Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com for assistance.
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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 Initial Release NA Final 2014-Aug-19
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