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Cisco Adaptive Security Appliance Software SSH Remote Command Injection Vulnerability

cisco-sa-asa-ssh-rce-gRAuPEUF · Critical · Published · Updated

A vulnerability in the SSH subsystem of Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, remote attacker to execute operating system commands as root. This vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by submitting crafted input when executing remote CLI commands over SSH. A successful exploit could allow the attacker to execute commands on the underlying operating system with root-level privileges. An attacker with limited user privileges could use this vulnerability to gain complete control over the system. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ssh-rce-gRAuPEUF This advisory is part of the October 2024 release of the Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: October 2024 Semiannual Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication.

Cisco advisory ·CSAF JSON

Workarounds

There is a workaround that addresses this vulnerability.

Enable the native SSH stack by disabling the CiscoSSH stack. Use the no ssh stack ciscossh command, as shown in the following example:

ciscoasa# conf t
ciscoasa(config)# no ssh stack ciscossh
Connection to 192.168.1.1 closed by remote host.
Connection to 192.168.1.1 closed.

Note: Active login sessions over SSH will be disconnected when the command is executed. For this change to become persistent across reboots, log in again and save the configuration.

While this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.

CVEsCVE-2024-20329
Cisco Bug IDsCSCwe93558
CVSS ScoreBase 9.9
Base 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
Product Names From Source
Cisco Adaptive Security Appliance (ASA) Software 9.17.1, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.7, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.9, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.10, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.11, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.13, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.15, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.20, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.30, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.33, Cisco Adaptive Security Appliance (ASA) Software 9.18.1, Cisco Adaptive Security Appliance (ASA) Software 9.18.1.3, Cisco Adaptive Security Appliance (ASA) Software 9.18.2, Cisco Adaptive Security Appliance (ASA) Software 9.18.2.5, Cisco Adaptive Security Appliance (ASA) Software 9.18.2.7, Cisco Adaptive Security Appliance (ASA) Software 9.18.2.8, Cisco Adaptive Security Appliance (ASA) Software 9.18.3, Cisco Adaptive Security Appliance (ASA) Software 9.18.3.39, Cisco Adaptive Security Appliance (ASA) Software 9.18.3.46, Cisco Adaptive Security Appliance (ASA) Software 9.18.3.53, Cisco Adaptive Security Appliance (ASA) Software 9.18.3.55, Cisco Adaptive Security Appliance (ASA) Software 9.18.3.56, Cisco Adaptive Security Appliance (ASA) Software 9.19.1, Cisco Adaptive Security Appliance (ASA) Software 9.19.1.5, Cisco Adaptive Security Appliance (ASA) Software 9.19.1.9, Cisco Adaptive Security Appliance (ASA) Software 9.19.1.12, Cisco Adaptive Security Appliance (ASA) Software 9.19.1.18, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Firepower 2100 Series, Cisco Firepower 1000 Series, Cisco 3000 Series Industrial Security Appliances (ISA), Cisco Firepower 9000 Series, Cisco Firepower 4100 Series, Cisco Adaptive Security Virtual Appliance (ASAv), Cisco Secure Firewall 3100 Series

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