BugZero | Palo Alto Networks BugID PAN-145133 - A fix was made to address a vulnerability in the P...

Palo Alto Networks - Defect ID: PAN-145133

A fix was made to address a vulnerability in the PAN-OS signature-based threat detection engine that allowed an attacker to evade threat prevention signatures using specifically crafted TCP packets ( CVE-2020-1999 ).

Palo Alto Networks - Defect ID: PAN-145133

A fix was made to address a vulnerability in the PAN-OS signature-based threat detection engine that allowed an attacker to evade threat prevention signatures using specifically crafted TCP packets ( CVE-2020-1999 ).

Last updated on Invalid date

BugZero Risk Score
6.3 Medium

Overall: 6.3

Severity: 6.4

Community: 3.7

Lifecycle: 10.0

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Bug Details

Description

The earliest recollection of this bug is traced back to PAN-OS 8.1.17 - July 22, 2025. This bug is fixed in PAN-OS versions 9.1.5, 8.1.17. A fix was made to address a vulnerability in the PAN-OS signature-based threat detection engine that allowed an attacker to evade threat prevention signatures using specifically crafted TCP packets ( CVE-2020-1999 ). For more information: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-release-notes/pan-os-8-1-addressed-issues/pan-os-8-1-17-addressed-issues https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-release-notes/pan-os-9-1-addressed-issues/pan-os-9-1-5-addressed-issues

Change history

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Top Palo Alto Networks Defects

6.3Defect ID: PAN-296202
( Firewalls in active/active HA configurations only ) Fixed an issue where, when a commit operation was in progress, newly deployed IP address tags that used the XML API were not immediately reflected in address group resolution, which delayed IP address mapping to address groups and caused traffic to be incorrectly allowed or denied.
6.3Defect ID: PAN-300372
( Panorama virtual appliances only ) Fixed an issue where maintenance mode was not accessible to do Factory Reset or switch to FIPSCC mode.
6.3Defect ID: PAN-299678
Fixed an issue where the firewall repeatedly rebooted when downgrading to an affected release.
6.3Defect ID: PAN-303700
Fixed an issue where GlobalProtect users were incorrectly dropped by the default Security policy rule after upgrading to PAN-OS 12.1.2 when IPv6 firewalling was disabled. This occurred due to policy rules configured with geographic regions matching traffic incorrectly.
6.3Defect ID: PAN-305151
Fixed an issue where the configuration was not updated on the AI Firewall in AWS after a successful configuration push from Strata Cloud Manager (SCM).

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Palo Alto Networks - Defect ID: PAN-145133

A fix was made to address a vulnerability in the PAN-OS signature-based threat detection engine that allowed an attacker to evade threat prevention signatures using specifically crafted TCP packets ( CVE-2020-1999 ).

Palo Alto Networks - Defect ID: PAN-145133

A fix was made to address a vulnerability in the PAN-OS signature-based threat detection engine that allowed an attacker to evade threat prevention signatures using specifically crafted TCP packets ( CVE-2020-1999 ).

Last updated on Invalid date

BugZero Risk Score6.3 Medium

Bug Details

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Top Palo Alto Networks Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.3 Medium