SB2022020926 - URL filtration bypass in Palo Alto PAN-OS

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Main Vulnerability Database SB2022020926

SB2022020926 - URL filtration bypass in Palo Alto PAN-OS

Published: February 9, 2022

Security Bulletin ID SB2022020926
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Incorrect Regular Expression (CVE-ID: CVE-2022-0011)

CWE-ID: CWE-185 - Incorrect Regular Expression

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to bypass URL filtration rules.

The vulnerability exists due to an error when processing forward slash (/), asterisk (*) and caret (^)  at the end of the hostname inside filtration rules added to the custom URL category list or to an external dynamic list (EDL) in a URL Filtering profile. As a result, unexpected domains can be blocked or allowed, resulting in a potential security issue.


Remediation

Install update from vendor's website.

References