Weak Cryptography in Palo Alto Networks PAN-OS



Published: 2021-08-12
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-3047
CWE-ID CWE-338
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor Palo Alto Networks, Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

EUVDB-ID: #VU55822

Risk: Low

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3047

CWE-ID: CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 8.1.0 - 10.0.3

External links

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


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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