Cisco Security Advisory
Cisco ONS 15454 Controller Card Denial of Service Vulnerability
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AV:N/AC:M/Au:N/C:N/I:N/A:P/E:F/RL:U/RC:C
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A vulnerability in the TLS/SSLv3 module of the Cisco ONS 15454 Controller Cards could allow an unauthenticated, remote attacker to cause the control card to reset.
The vulnerability is due to improper validation of the TLS/SSLv3 packets. An attacker could exploit this vulnerability by sending a specific set of packets to the control card. An exploit could allow the attacker to trigger the control card to reset.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit this vulnerability, an attacker likely would need access to trusted, internal networks to send TLS/SSLv3 packets to the targeted device. This access requirement may reduce the possibility 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 CSCuh34787 for the most complete list of affected product versions.
Vulnerable Products
At the time this alert was first published, Cisco ONS 15454 System Software Release 9.8 was vulnerable. Later releases of Cisco ONS 15454 System 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 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 2013-Dec-03
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