Double Free in Cisco Firewall Threat Defense (FTD) - CVE-2020-3179
Published: May 7, 2020
Vulnerability identifier: #VU27590
CSH Severity: High
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-2020-3179
CWE-ID: CWE-415
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 memory handling error when the generic routing encapsulation (GRE) over IPv6 traffic is processed. A remote attacker can send a specially crafted GRE over IPv6 packets with either IPv4 or IPv6 payload, trigger double free error and cause a denial of service condition on the target system.
Affected software
Cisco Firewall Threat Defense (FTD)
How to mitigate CVE-2020-3179
Install update from vendor's website.
Cisco Firewall Threat Defense (FTD) - addressed in versions 6.3.0.5, 6.4.0.6