Vulnerability identifier: #VU26487

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11501

CWE-ID: CWE-330

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GnuTLS
Universal components / Libraries / Libraries used by multiple products

Vendor: GnuTLS

Description

The vulnerability allows a remote attacker to decrypt data.

The vulnerability exists in GnuTLS DTLS protocol implementation due to an error in code that caused DTLS client not to contribute any randomness to the DTLS negotiation. As a result a remote attacker with ability to intercept network traffic can decrypt data passed via TLS 1.3 connection and gain access to sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GnuTLS: 3.6.3 - 3.6.12

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External links
http://www.gnutls.org/security-new.html#GNUTLS-SA-2020-03-31

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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.