Security readout for executives and security teams
Plain-English summary
PAN-OS could trust a spoofed Kerberos authentication server when Kerberos authentication profiles are used. A network-positioned attacker able to intercept traffic between PAN-OS and the KDC could authenticate to PAN-OS as an administrator. The issue is high impact, but requires man-in-the-middle positioning.
Executive priority
Treat as a high-priority firewall administration risk where Kerberos authentication is used. It can lead to administrator access, but exploitation requires network interception capability. Prioritize internet-edge and high-trust firewall management environments first, especially older PAN-OS branches.
Technical view
CVE-2020-2002 is a CWE-290 authentication bypass in PAN-OS authentication daemon and User-ID components. PAN-OS fails to verify KDC integrity before authenticating users through Kerberos profiles. Affected versions are PAN-OS 7.1 before 7.1.26, all 8.0, 8.1 before 8.1.13, and 9.0 before 9.0.6.
Likely exposure
Exposure is limited to Palo Alto Networks PAN-OS deployments using a Kerberos authentication profile. Systems not using Kerberos authentication profiles are not described as affected by the provided sources. Highest concern is administrative authentication paths where PAN-OS communicates with a reachable KDC over networks an attacker could intercept.
Exploitation context
The sources describe a man-in-the-middle attacker who can intercept PAN-OS-to-KDC communication and then log in as an administrator. CVSS marks attack complexity high. The provided bundle does not cite CISA KEV listing, public exploitation, exploit code, or active exploitation.
Researcher notes
Evidence is specific to Kerberos-backed authentication in PAN-OS. The main uncertainty is environmental: whether the attacker can intercept PAN-OS-to-KDC traffic. The provided sources do not name active exploitation or detailed vendor mitigations beyond fixed version boundaries.
Mitigation direction
- Upgrade PAN-OS 7.1 to 7.1.26 or later if still in use.
- Upgrade PAN-OS 8.1 to 8.1.13 or later.
- Upgrade PAN-OS 9.0 to 9.0.6 or later.
- For PAN-OS 8.0, follow vendor guidance because all listed 8.0 versions are affected.
- Review and harden network paths between PAN-OS systems and Kerberos KDCs.
Validation and detection
- Inventory PAN-OS versions across firewalls and management appliances.
- Identify authentication profiles using Kerberos.
- Confirm whether affected systems are below the fixed versions listed by Palo Alto Networks.
- Review administrator login logs for unexpected Kerberos-authenticated access.
- Document any PAN-OS 8.0 systems requiring migration planning.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-290: Exact CWE lookup
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Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-2002 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://security.paloaltonetworks.com/CVE-2020-2002CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Authentication Bypass by Spoofing
Authentication Bypass by Spoofing represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.