Use of insufficiently random values in gnutls (Alpine package)

Published: 2020-03-31

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2020-11501
CWE-ID	CWE-330
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	gnutls (Alpine package) Operating systems & Components / Operating system package or component
Vendor	Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Use of insufficiently random values

EUVDB-ID: #VU26487

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 - Use of Insufficiently Random Values

Exploit availability: No

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 update from vendor's website.

Vulnerable software versions

gnutls (Alpine package): 3.6.6-r0 - 3.6.12-r0

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.