Vulnerability CVE-2020-4067
Published: 2020-06-29

Description:
In coturn before version 4.5.1.3, there is an issue whereby STUN/TURN response buffer is not initialized properly. There is a leak of information between different client connections. One client (an attacker) could use their connection to intelligently query coturn to get interesting bytes in the padding bytes from the connection of another client. This has been fixed in 4.5.1.3.

Type:

CWE-665

 (Improper Initialization)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Debian -> Debian linux 
Coturn project -> Coturn 

 References:
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00010.html
https://github.com/coturn/coturn/blob/aab60340b201d55c007bcdc853230f47aa2dfdf1/ChangeLog#L15
https://github.com/coturn/coturn/issues/583
https://github.com/coturn/coturn/security/advisories/GHSA-c8r8-8vp5-6gcm
https://lists.debian.org/debian-lts-announce/2020/07/msg00002.html
https://www.debian.org/security/2020/dsa-4711
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