#VU46573 Raccoon attack


Published: 2020-09-10 | Updated: 2021-01-22

Vulnerability identifier: #VU46573

Vulnerability 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

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenSSL
Server applications / Encryption software

Vendor: OpenSSL Software Foundation

Description

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenSSL: 1.0.2, 1.0.2a, 1.0.2b, 1.0.2c, 1.0.2d, 1.0.2e, 1.0.2f, 1.0.2g, 1.0.2h, 1.0.2i, 1.0.2j, 1.0.2k, 1.0.2l, 1.0.2m, 1.0.2n, 1.0.2o, 1.0.2p, 1.0.2q, 1.0.2r, 1.0.2s, 1.0.2t, 1.0.2u, 1.0.2v

CPE

External links
https://www.openssl.org/news/secadv/20200909.txt


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.


Latest bulletins with this vulnerability