Vulnerability in Palo Alto Networks Pan-Os
CVE-2021-3047
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.
EPSS: 0.005 (36.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Palo Alto Networks Pan-os — versions 10.1.*, 8.1, 9.0
- Paloaltonetworks Pan-os
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@paloaltonetworks.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-3047?
- CVE-2021-3047 is a medium-severity vulnerability in Palo Alto Networks Pan-Os, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 4.2/10. Published 2021-08-11.
- How severe is CVE-2021-3047?
- Medium severity. CVSS v3 base score is 4.2 out of 10.
- Is CVE-2021-3047 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.