CVE-2021-3047

11.08.2021, 17:15

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.

PRNG

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	4.2 MEDIUM	NETWORK	HIGH	LOW	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
palo_alto	CNA	4.2 MEDIUM	NETWORK	HIGH	LOW	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 51%

Vendor	Product	Version
paloaltonetworks	pan-os	8.1.0 ≤ 𝑥 < 8.1.19
paloaltonetworks	pan-os	9.0.0 ≤ 𝑥 < 9.0.14
paloaltonetworks	pan-os	9.1.0 ≤ 𝑥 < 9.1.10
paloaltonetworks	pan-os	10.0.0 ≤ 𝑥 < 10.0.4

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.

References

https://security.paloaltonetworks.com/CVE-2021-3047