Vulnerability Name:

CVE-2021-3055 (CCN-208897)

Assigned:2021-09-08
Published:2021-09-08
Updated:2021-09-15
Summary:An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator to read any arbitrary file from the file system and send a specifically crafted request to the firewall that causes the service to crash. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. This issue impacts: 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 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.6. This issue does not affect Prisma Access.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): High
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): Complete
8.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-611
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-3055

Source: XF
Type: UNKNOWN
paloalto-cve20213055-dos(208897)

Source: CCN
Type: Palo Alto Networks Security Advisories
CVE-2021-3055 PAN-OS: XML External Entity (XXE) Reference Vulnerability in the PAN-OS Web Interface

Source: CONFIRM
Type: Vendor Advisory
N/A

Vulnerable Configuration:Configuration 1:
  • cpe:/o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* (Version >= 8.1.0 and < 8.1.20)
  • OR cpe:/o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* (Version >= 9.0.0 and < 9.0.14)
  • OR cpe:/o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* (Version >= 9.1.0 and < 9.1.10)
  • OR cpe:/o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* (Version >= 10.0.0 and < 10.0.6)

    • Configuration CCN 1:
  • cpe:/o:paloaltonetworks:pan-os:9.0.6:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.0.7:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.1.1:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.0.8:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.1.0:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.1.2:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.0.10:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.1.3:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.0.9:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.1.4:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.0.11:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.0.12:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:10.0.5:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.1.9:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:9.0.13:*:*:*:*:*:*:*
  • OR cpe:/o:paloaltonetworks:pan-os:8.1.19:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    paloaltonetworks pan-os *
    paloaltonetworks pan-os *
    paloaltonetworks pan-os *
    paloaltonetworks pan-os *
    paloaltonetworks pan-os 9.0.6
    paloaltonetworks pan-os 9.0.7
    paloaltonetworks pan-os 9.1.1
    paloaltonetworks pan-os 9.0.8
    paloaltonetworks pan-os 9.1.0
    paloaltonetworks pan-os 9.1.2
    paloaltonetworks pan-os 9.0.10
    paloaltonetworks pan-os 9.1.3
    paloaltonetworks pan-os 9.0.9
    paloaltonetworks pan-os 9.1.4
    paloaltonetworks pan-os 9.0.11
    paloaltonetworks pan-os 9.0.12
    paloaltonetworks pan-os 10.0.5
    paloaltonetworks pan-os 9.1.9
    paloaltonetworks pan-os 9.0.13
    paloaltonetworks pan-os 8.1.19