Raccoon Attack in Palo Alto Prisma Access

Published: 2021-10-13
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-1968
Exploitation vector Network
Public exploit N/A
Vulnerable software
Prisma Access
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor Palo Alto Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Raccoon attack

EUVDB-ID: #VU46573

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1968

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a timing flaw in the TLS specification. A remote attacker can compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite and eavesdrop on all encrypted communications sent over that TLS connection.

Note: The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections.


Install update from vendor's website.

Vulnerable software versions

Prisma Access: 2.1, 2.1.0, 2.1.0-h4, 2.1.0-h6, 2.1.0-h8, 2.1.0-h11, 2.1.0-h12

CPE2.3 External links


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.