SSH Malformed Packet Vulnerabilities - Cisco Systems

Critical Nessus Plugin ID 48968


The remote device is missing a vendor-supplied security patch.


Certain Cisco products containing support for the Secure Shell (SSH) server are vulnerable to a Denial of Service (DoS) if the SSH server is enabled on the device. A malformed SSH packet directed at the affected device can cause a reload of the device. No authentication is necessary for the packet to be received by the affected device. The SSH server in Cisco IOS is disabled by default.

Cisco will be making free software available to correct the problem as soon as possible.

The malformed packets can be generated using the SSHredder test suite from Rapid7, Inc. Workarounds are available. The Cisco PSIRT is not aware of any malicious exploitation of this vulnerability.


Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20021219-ssh-packet

See Also

Plugin Details

Severity: Critical

ID: 48968

File Name: cisco-sa-20021219-ssh-packethttp.nasl

Version: 1.20

Type: local

Family: CISCO

Published: 2010/09/01

Updated: 2018/11/15

Dependencies: 47864

Risk Information

Risk Factor: Critical

CVSS v2.0

Base Score: 10

Temporal Score: 8.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2002/12/19

Vulnerability Publication Date: 2002/12/16

Exploitable With

Metasploit (PuTTY Buffer Overflow)

Reference Information

CVE: CVE-2002-1357, CVE-2002-1358, CVE-2002-1359, CVE-2002-1360

BID: 6405, 6407, 6408, 6410