QID 730191

Date Published: 2021-09-20

QID 730191: Palo Alto Networks PAN-OS Unsigned Code Execution During Plugin Installation Race Condition Vulnerability (PAN-138727)

PAN OS is the software that runs all Palo Alto Networks next-generation firewalls.

A time-of-check to time-of-use (TOCTOU) race condition vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator with permission to upload plugins to execute arbitrary code with root user privileges. Affected Versions:
PAN-OS 8.1 versions earlier than PAN-OS 8.1.20
PAN-OS 9.0 versions earlier than PAN-OS 9.0.14
PAN-OS 9.1 versions earlier than PAN-OS 9.1.11
PAN-OS 10.0 versions earlier than PAN-OS 10.0.7
PAN-OS 10.1 versions earlier than PAN-OS 10.1.2
QID Detection Logic (Authenticated):
This QID looks for the vulnerable version of PAN-OS via XML API.

NOTE:This issue does not affect Prisma Access.

A time-of-check to time-of-use (TOCTOU) race condition vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator with permission to upload plugins to execute arbitrary code with root user privileges.

  • CVSS V3 rated as High - 6.6 severity.
  • CVSS V2 rated as Critical - 8.5 severity.
    • Solution

    Refer to PAN-138727 for more information about patching this vulnerability.Workaround:
    Enable signatures for Unique Threat ID 91572 on traffic processed by the firewall to block attacks against CVE-2021-3054. This issue requires the attacker to have authenticated access to the PAN-OS web interface. You can mitigate the impact of this issue by following best practices for securing the PAN-OS web interface. Please review the Best Practices for Securing Administrative Access in the PAN-OS technical documentation at https://docs.paloaltonetworks.com/best-practices.

    Vendor References

    CVEs related to QID 730191

    CVE-2021-3054 |
    Software Advisories
    Advisory ID Software Component Link
    PAN-138727 URL Logo security.paloaltonetworks.com/CVE-2021-3054
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