Vigie VulnDBEuropean-hosted Vulnerability DB

CVE-2021-3047

PAN-OS: Weak Cryptography Used in Web Interface Authentication

At a glance

Severity
MEDIUM 4.2
EPSS
EPSS 0.45 % · percentile 39 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
palo_alto
NVD status
Modified

Description

A cryptographically weak pseudo-random number generator (PRNG) is used during authentication to the Palo Alto Networks PAN-OS web interface. This enables an authenticated attacker, with the capability to observe their own authentication secrets over a long duration on the PAN-OS appliance, to impersonate another authenticated web interface administrator's session. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.19; 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 10.0.4. PAN-OS 10.1 versions are not impacted.

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 4.2CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:Npalo_alto
CVSS 3.1MEDIUM 4.2CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:NNVD · psirt@paloaltonetworks.com (Secondary)
CVSS 3.1LOW 3.1CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:NNVD · nvd@nist.gov (Primary)
CVSS 2.0LOW 3.5AV:N/AC:M/Au:S/C:N/I:P/A:NNVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Palo Alto Networks · PAN-OSunaffected 10.1.* ; affected 8.1 < 8.1.19 ; affected 9.0 < 9.0.14 ; affected 10.0 < 10.0.4 ; affected 9.1 < 9.1.10

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD