Cisco Security Advisory
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AV:N/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:W/RC:C
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A vulnerability in the SSL logging daemon of Cisco Application Control Engine (ACE) could allow an unauthenticated, remote attacker to cause a denial of service condition on the affected device.
The vulnerability occurs because the Cisco ACE fails to rotate logs from SSL sessions, exhausting the hard drive of free space. An attacker could exploit this vulnerability by sending excessive amounts of SSL connections to the affected device. An exploit could allow the attacker to exhaust remaining free space on the hard drive, causing operations such as configuration and writing configurations on the disk to fail. Additional errors can be observed on the Cisco ACE console.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit this vulnerability, an attacker may require access to a trusted, internal network to send a series of SSL connections to the targeted system. This access requirement could limit the likelihood of a successful exploit.
Customers are advised to review the bug reports in the "Vendor Announcements" section for a current list of affected versions.
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 bug ID CSCug78957 at the following link: CVE-2013-1202
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Administrators are advised to contact the vendor regarding future updates and releases.
Cisco customers may contact the Cisco Technical Assistance Center (TAC) at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com for assistance in applying a workaround to mitigate this vulnerability.
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 Cisco Application Control Engine contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are not available. NA Final 2013-May-16
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