Cisco Security Advisory
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AV:N/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:U/RC:C
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A vulnerability in the Simple Network Management Protocol (SNMP) code of Cisco ASR 5500 System Architecture Evolution (SAE) Gateway could allow an unauthenticated, remote attacker to cause high CPU utilization and the SNMP process may stop responding.
The vulnerability is due to insufficient validation of malformed SNMP packets. An attacker could exploit this vulnerability by sending malformed SNMP packets to the affected system.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit this vulnerability, an attacker may need access to trusted, internal networks to send malformed SNMP 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 CSCur13393 for the most complete list of affected product versions.
Vulnerable Products
At the time this alert was first published, Cisco ASR 5000 Series Software version 17.0 and prior were vulnerable. Later releases of Cisco ASR 5000 Series Software 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 contact the vendor regarding future updates and releases.
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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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 Initial Release NA Final 2015-Feb-17
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