Vulnerability · Published Nov 12, 2020 · Assigned by palo_alto

CVE-2020-1999PAN-OS: Threat signatures are evaded by specifically crafted packets

Medium 5.3

In plain English

A medium-severity security flaw in PAN-OS from Palo Alto Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)1.3%top 28.6% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Palo Alto Networks	PAN-OS	7.1.8.0.8.1 – before 8.1.179.0 – before 9.0.119.1 – before 9.1.5

Weakness: CWE-754 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

https://security.paloaltonetworks.com/CVE-2020-1999 x_refsource_MISC