CVE-2021-3048
Assigner: palo_alto
Published: 2021-08-11T00:00:00
State: PUBLISHED
affected: product: PAN-OS
vendor: Palo Alto Networks
versions: status: unaffected
version: 10.1.*
status: unaffected
version: 8.1.*
changes: at: 9.0.14
status: unaffected
lessThan: 9.0.14
status: affected
version: 9.0
versionType: custom
changes: at: 9.1.9
status: unaffected
lessThan: 9.1.9
status: affected
version: 9.1
versionType: custom
changes: at: 10.0.5
status: unaffected
lessThan: 10.0.5
status: affected
version: 10.0
versionType: custom
configurations: value: This issue is applicable only if an External Dynamic List (EDL) is configured on the firewall.
An EDL that contains only domain names or IP addresses will not cause this issue.
credits: value: This issue was encountered by some customers of Palo Alto Networks during regular operation.
datePublic: 2021-08-11T00:00:00
descriptions: value: 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.
metrics: cvssV3_1: attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 5.9
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.1
problemTypes: descriptions: cweId: CWE-20
description: CWE-20 Improper Input Validation
type: CWE
solutions: value: This issue is fixed in PAN-OS 9.0.14, PAN-OS 9.1.9, PAN-OS 10.0.5, and all later PAN-OS versions.

If a firewall encounters this problem, you will require TAC assistance to make the firewall operational again.
source: defect: PAN-160455
discovery: USER
timeline: time: 2021-08-11T00:00:00
value: Initial publication
title: PAN-OS: Invalid URLs in an External Dynamic List (EDL) can Lead to Firewall Outage
workarounds: value: 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.
x_generator: engine: Vulnogram 0.0.9