Vulnerability identifier: #VU17844
Vulnerability risk: Medium
CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Cisco Firepower Threat Defense (FTD)
Hardware solutions /
Security hardware applicances
Vendor: Cisco Systems, Inc
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists in the detection engine due to the incomplete error handling of the SSL or TLS packet header during the connection establishment. A remote attacker can send a specially crafted SSL or TLS packet during the connection handshake and cause the SNORT detection engine to unexpectedly restart, resulting in a partial DoS condition while the detection engine restarts.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Cisco Firepower Threat Defense (FTD): 6.2.3.4, 6.3.0
External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190220-fpwr-ssltls-dos
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.