TI-2020-01915 Aliases CVE-2020-1999 GHSA-6p97-xh7r-7cmv

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

LOW 27CWE-754Published 2020-11-12 · Updated 2024-09-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.01337 71st percentileScored 2026-11-07

Fix Fixed PAN-OS (Palo Alto Networks): 8.1.17, 9.0.11, 9.1.5

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Palo Alto Networks	PAN-OS	all versions; all versions; 8.1 to before 8.1.17; 9.0 to before 9.0.11; 9.1 to before 9.1.5	8.1.17, 9.0.11, 9.1.5	Patch available	CNA

PAN-OS VendorPalo Alto Networks Affected all versions; all versions; 8.1 to before 8.1.17; 9.0 to before 9.0.11; 9.1 to before 9.1.5 Fixed in 8.1.17, 9.0.11, 9.1.5 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:paloaltonetworks:pan-os::::::::	7.1.0 – 7.1.26; 8.0.0 – 8.0.20; 8.1.0 to before 8.1.17; 9.0.0 to before 9.0.11; 9.1.0 to before 9.1.5	Vulnerable	CyberArk Software, a Palo Alto Networks Company

cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* Versions 7.1.0 – 7.1.26; 8.0.0 – 8.0.20; 8.1.0 to before 8.1.17; 9.0.0 to before 9.0.11; 9.1.0 to before 9.1.5 Vulnerable ·CyberArk Software, a Palo Alto Networks Company

Remediation

Fix · CNA PAN-OS (Palo Alto Networks) Fixed in 8.1.17, 9.0.11, 9.1.5

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2020-11-12
Palo Alto Networks PAN-OS 8.1.17, 9.0.11, 9.1.5
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2020-01937 PAN-OS: Panorama session disclosure during context switch into managed devicePriority LOW 35
Show all 2 records →

Timeline

2026-10-02 Threatist record created from CVE-2020-1999
2026-10-03 Alias added: GHSA-6p97-xh7r-7cmv

References

Advisory 1

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

TI-2024-08782 Expedition: Unauthenticated OS Command Injection Vulnerability Leads to Firewall Credential Disclosure KEVCVSS 4.0CRITICAL 9.9
TI-2024-03172 PAN-OS: Arbitrary File Creation Leads to OS Command Injection Vulnerability in GlobalProtect KEVCVSS 3.1CRITICAL 10.0
TI-2020-01936 PAN-OS: Authentication Bypass in SAML Authentication KEVCVSS 3.1CRITICAL 10.0
TI-2017-11675 Palo Alto Networks PAN-OS before 6.1.19, 7.0.x before 7.0.19, 7.1.x before 7.1.14, and… KEVCVSS 3.1CRITICAL 9.8
TI-2026-00239 PAN-OS: Unauthenticated user initiated Buffer Overflow Vulnerability in User-ID™ Authentication Portal KEVCVSS 4.0CRITICAL 9.3
TI-2024-08784 Expedition: SQL Injection Leads to Firewall Admin Credential Disclosure KEVCVSS 4.0CRITICAL 9.2

See all 367 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences