Cisco Security Advisory
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AV:N/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:OF/RC:C
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Cisco Carrier Routing System (CRS) contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.
The vulnerability is due to the improper handling of malformed packets processed by the affected software. An unauthenticated, remote attacker could exploit the vulnerability by sending malformed packets to a targeted device. Processing the malformed packets could slow down the processing of legitimate traffic, resulting in a DoS condition.
Cisco has confirmed this vulnerability in a security notice and software updates are available.
To exploit this vulnerability, an attacker must be able to submit malformed packets to the targeted device, likely requiring the attacker to access trusted, internal networks. This access requirement limits 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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Cisco has released a security notice for Cisco bug ID CSCud79136 at the following link: CVE-2013-1112
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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 are advised to monitor affected systems.
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Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com.
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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-Jan-28
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