CVE-2019-1981 Cisco Firepower Threat Defense Software NULL Character Obfuscation Detection Bypass Vulnerability
Unauthenticated remote attackers can bypass filtering protections by sending obfuscated payloads, delivering malicious content to protected systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-1981?
CVE-2019-1981 is a medium-severity vulnerability in Cisco Secure Firewall Management Center, published on 5 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the normalization functionality of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to insufficient normalization of a text-based payload. An attacker could exploit this vulnerability by sending traffic that contains specifically obfuscated payloads through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious payloads to protected systems that would otherwise be blocked.
Which versions are affected by CVE-2019-1981?
It affects 3 products.
Products include Cisco Firepower Services Software for Asa, Cisco Secure Firewall Management Center, Cisco Secure Firewall Threat Defense.
How do I fix CVE-2019-1981?
No fix has been published for CVE-2019-1981 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-1981 being exploited?
There is no known exploitation of CVE-2019-1981 in the wild and no public exploit code.
Other vulnerabilities in Cisco Secure Firewall Management Center
- CVE-2022-20918 Hardcoded credentials in Cisco FirePOWER Services Software for ASA
- CVE-2019-1978 Cisco Firepower Threat Defense Software Stream Reassembly Bypass Vulnerability
- CVE-2019-1980 Cisco Firepower Threat Defense Software Nonstandard Protocol Detection Bypass Vulnerability
- CVE-2019-1982 Cisco Firepower Threat Defense Software HTTP Filtering Bypass Vulnerability
Sources
Also known as GHSA-55w6-hghf-mfpw.