CVE-2022-0028
Published: August 22, 2022
Official Description
A Palo Alto Networks PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to conduct reflected and amplified TCP denial-of-service (RDoS) attacks.
CISA KEV Advisory
Palo Alto Networks PAN-OS Reflected Amplification Denial-of-Service Vulnerability
A Palo Alto Networks PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to conduct reflected and amplified TCP denial-of-service (RDoS) attacks.
Apply updates per vendor instructions.
Risk Analysis
A misconfiguration in Palo Alto Networks PAN-OS URL filtering can enable network-based attackers to launch reflected and amplified TCP denial-of-service attacks. The absence of a CVSS score is offset by its inclusion in CISA's KEV catalog and an EPSS score of 0.04682, indicating a high probability of active exploitation and a need for immediate attention.
This vulnerability is actively exploited in the wild, as indicated by its presence in CISA's KEV. Attackers can leverage this remotely over the network.
Administrators should review and correct their Palo Alto Networks PAN-OS URL filtering policies to prevent this misconfiguration. Consult Palo Alto Networks documentation for specific guidance on secure URL filtering configurations.
Technical Analysis
CVE-2022-0028 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2022-0028 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-0028 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1