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Cisco Wireless LAN Controller Telnet Denial of Service Vulnerability

Cisco-SA-20130506-CVE-2013-1235 · Medium · Published · Updated

A vulnerability in Cisco Wireless LAN Controller Software could allow an unauthenticated, remote attacker to create a denial of service (DoS) condition for remote login Telnet sessions. The vulnerability is due to improper cleanup of incorrectly terminated remote login sessions. An exploit could allow an attacker to exhaust available Telnet sessions and deny service to new administrator Telnet sessions. Cisco has confirmed the vulnerability in a security notice; however, software updates are not available. 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.

Cisco advisory ·CSAF JSON

Workarounds

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.

CVEsCVE-2013-1235
Cisco Bug IDsCSCug35507
CVSS ScoreBase 5.0
Base 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:U/RC:C
Product Names From Source
Cisco Wireless LAN Controller (WLC) Base, Cisco Wireless LAN Controller (WLC) 7.0.98.0, Cisco Wireless LAN Controller (WLC) 7.0.116.0, Cisco Wireless LAN Controller (WLC) 7.0.98.218, Cisco Wireless LAN Controller (WLC) 7.0.220.0, Cisco Wireless LAN Controller (WLC) 7.1.91.0, Cisco Wireless LAN Controller (WLC) 7.2.103.0, Cisco Wireless LAN Controller (WLC) 7.3.101.0, Cisco Wireless LAN Controller (WLC)

CSAF Product Statuses

Product Status Source CVE Rows
7.0.116.0 known_affected cisco_csaf CVE-2013-1235 1
7.0.220.0 known_affected cisco_csaf CVE-2013-1235 1
7.0.98.0 known_affected cisco_csaf CVE-2013-1235 1
7.0.98.218 known_affected cisco_csaf CVE-2013-1235 1
7.1.91.0 known_affected cisco_csaf CVE-2013-1235 1
7.2.103.0 known_affected cisco_csaf CVE-2013-1235 1
7.3.101.0 known_affected cisco_csaf CVE-2013-1235 1
Base known_affected cisco_csaf CVE-2013-1235 4

Related Products

Product CVE Evidence
Cisco Wireless LAN Controller (WLC) CVE-2013-1235 Cisco OpenVuln