Description
A vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a memory handling error when GRE over IPv6 traffic is processed. An attacker could exploit this vulnerability by sending crafted GRE over IPv6 packets with either IPv4 or IPv6 payload through an affected device. A successful exploit could allow the attacker to cause the device to crash, resulting in a DoS condition.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
x_refsource_cisco
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-dos-2-sS2h7aWe
Scores
CVSS v3
7.5
EPSS
0.0116
EPSS Percentile
78.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-415
Status
published
Products (25)
cisco/asa_5505_firmware
9.9\(2\)
cisco/asa_5505_firmware
101.5\(1.26\)
cisco/asa_5510_firmware
9.9\(2\)
cisco/asa_5510_firmware
101.5\(1.26\)
cisco/asa_5512-x_firmware
9.9\(2\)
cisco/asa_5512-x_firmware
101.5\(1.26\)
cisco/asa_5515-x_firmware
9.9\(2\)
cisco/asa_5515-x_firmware
101.5\(1.26\)
cisco/asa_5520_firmware
9.9\(2\)
cisco/asa_5520_firmware
101.5\(1.26\)
... and 15 more
Published
May 06, 2020
Tracked Since
Feb 18, 2026