CVE-2020-1999 PAN-OS: Threat signatures are evaded by specifically crafted packets
Attackers can evade threat detection by sending crafted TCP packets, allowing malicious traffic to bypass security controls on PAN-OS firewalls.
- 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-2020-1999?
CVE-2020-1999 is a medium-severity vulnerability in Paloaltonetworks Pan-Os, published on 12 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability exists in the Palo Alto Network PAN-OS signature-based threat detection engine that allows an attacker to communicate with devices in the network in a way that is not analyzed for threats by sending data through specifically crafted TCP packets. This technique evades signature-based threat detection. This issue impacts: PAN-OS 8.1 versions earlier than 8.1.17; PAN-OS 9.0 versions earlier than 9.0.11; PAN-OS 9.1 versions earlier than 9.1.5; All versions of PAN-OS 7.1 and PAN-OS 8.0.
Weakness: CWE-754
Which versions are affected by CVE-2020-1999?
It affects 1 product.
Products include Paloaltonetworks Pan-Os.
How do I fix CVE-2020-1999?
No fix has been published for CVE-2020-1999 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-1999 being exploited?
There is no known exploitation of CVE-2020-1999 in the wild and no public exploit code.
Other vulnerabilities in Paloaltonetworks Pan-Os
- CVE-2024-3400 Palo Alto Networks PAN-OS Command Injection
- CVE-2020-2021 Palo Alto Networks PAN-OS Authentication Bypass
- CVE-2017-15944 Palo Alto Networks PAN-OS Remote Code Execution
- CVE-2026-0300 Palo Alto Networks PAN-OS Out-of-bounds Write
- CVE-2024-0012 Palo Alto Networks PAN-OS Management Interface Authentication Bypass
Sources
Also known as GHSA-6p97-xh7r-7cmv.