CVE-2021-3048

Summary

Certain invalid URL entries contained in an External Dynamic List (EDL) cause the Device Server daemon (devsrvr) to stop responding. This condition causes subsequent commits on the firewall to fail and prevents administrators from performing commits and configuration changes even though the firewall remains otherwise functional. If the firewall then restarts, it results in a denial-of-service (DoS) condition and the firewall stops processing traffic. This issue impacts: PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.9; PAN-OS 10.0 versions earlier than PAN-OS 10.0.5. PAN-OS 8.1 and PAN-OS 10.1 versions are not impacted.

Affected Software

VendorProductVersion RangeStatus
Palo Alto NetworksPAN-OS10.1.*unaffected
Palo Alto NetworksPAN-OS8.1.*unaffected
Palo Alto NetworksPAN-OS9.0 < 9.0.14affected
Palo Alto NetworksPAN-OS9.1 < 9.1.9affected
Palo Alto NetworksPAN-OS10.0 < 10.0.5affected

Weaknesses

  • CWE-20: CWE-20 Improper Input Validation

Workarounds

You can prevent this issue by removing all invalid URL entries from source EDLs or removing the EDL from your configuration.

Additionally, do not configure EDLs from websites that you do not trust.

ADP Enrichment

CVE Program Container

Additional References

References