Palo Alto PAN-OS update for OpenSSL

Published: 2022-03-31 | Updated: 2022-05-03
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-0778
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor Palo Alto Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Infinite loop

EUVDB-ID: #VU61391

Risk: Medium


CVE-ID: CVE-2022-0778

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: Yes


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop within the BN_mod_sqrt() function when processing an ASN.1 certificate that contains elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. A remote attacker can supply a specially crafted certificate to the TLS server or client, consume all available system resources and cause denial of service conditions.


Install update from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 10.2.0, 10.1.0 - 10.1.5, 9.1 - 9.1.13-h1, 9.0 - 9.0.16, 8.1 - 8.1.22, 10.0.0 - 10.0.9

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?