Buffer overflow in Cisco Firewall Threat Defense (FTD) - CVE-2021-34781
Published: October 29, 2021
Vulnerability identifier: #VU57786
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-34781
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the processing of SSH connections for multi-instance deployments. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.
Affected software
Cisco Firewall Threat Defense (FTD)
How to mitigate CVE-2021-34781
Install updates from vendor's website.
Cisco Firewall Threat Defense (FTD) - addressed in versions 6.4.0.13, 6.6.5, 6.7.0.3, 7.0.1