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CVE

CVE-2020-1999

A vulnerability exists in the Palo Alto Network PAN-OS signature-based threat detection engine that allows an attacker t

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.

MEDIUM · CVSS 5.3 EPSS 0.00295
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-754Improper Check for Unusual or Exceptional Conditions
CWE-754Improper Check for Unusual or Exceptional Conditions
▤

Affected Products & Versions

5
paloaltonetworks pan-os>= 7.1.0 and <= 7.1.26
paloaltonetworks pan-os>= 8.0.0 and <= 8.0.20
paloaltonetworks pan-os>= 8.1.0 and < 8.1.17
paloaltonetworks pan-os>= 9.0.0 and < 9.0.11
paloaltonetworks pan-os>= 9.1.0 and < 9.1.5
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · psirt@paloaltonetworks.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Nov 2020 · 12:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://security.paloaltonetworks.com/CVE-2020-1999Vendor Advisory
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