Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in Palo Alto PAN-OS - CVE-2021-3047
Published: August 12, 2021
Vulnerability identifier: #VU55822
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-3047
CWE-ID: CWE-338
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to impersonate sessions of other users.
The vulnerability exists due to usage of a weak pseudo-random number generator (PRNG) in PAN-OS web interface. A remote authenticated user with the capability to observe their own authentication secrets over a long duration on the PAN-OS appliance can impersonate another authenticated web interface administrator's session.
Affected software
Palo Alto PAN-OS
How to mitigate CVE-2021-3047
Install updates from vendor's website.
Palo Alto PAN-OS - addressed in versions 8.1.19, 9.0.14, 9.1.10, 10.0.4