Denial of service in Cisco Firepower Threat Defense
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-1691 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Cisco Firepower Threat Defense (FTD) Hardware solutions / Security hardware applicances |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU17844
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: CVE-2019-1691
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco Firepower Threat Defense (FTD): 6.2.3.4 - 6.3.0
External linksQ & A
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.
