CVE-2020-1992 PAN-OS on PA-7000 Series: Varrcvr daemon network-based denial of service or privilege escalation
Description
A format string vulnerability in the Varrcvr daemon of PAN-OS on PA-7000 Series devices with a Log Forwarding Card (LFC) allows remote attackers to crash the daemon creating a denial of service condition or potentially execute code with root privileges.
This issue affects Palo Alto Networks PAN-OS 9.0 versions before 9.0.7; PAN-OS 9.1 versions before 9.1.2 on PA-7000 Series devices with an LFC installed and configured.
This issue requires WildFire services to be configured and enabled.
This issue does not affect PAN-OS 8.1 and earlier releases.
This issue does not affect any other PA Series firewalls.
Product Status
| Versions | Affected | Unaffected |
|---|---|---|
| PAN-OS 9.1 | < 9.1.2 on PA-7000 series with LFC | >= 9.1.2 on PA-7000 series with LFC |
| PAN-OS 9.0 | < 9.0.7 on PA-7000 series with LFC | >= 9.0.7 on PA-7000 series with LFC |
| PAN-OS 8.1 | None | 8.1.* |
| PAN-OS 8.0 | None | 8.0.* |
| PAN-OS 7.1 | None | 7.1.* |
Required Configuration for Exposure
This issue requires WildFire services to be configured and enabled.
Severity: HIGH
CVSSv3.1 Base Score: 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Weakness Type
CWE-134 Use of Externally-Controlled Format String
Solution
This issue is fixed in PAN-OS 9.0.7, PAN-OS 9.1.2 and all later versions.
Workarounds and Mitigations
There are no viable workarounds for this issue.