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7.5
CVSSv3

CVE-2020-4067

Published: 29/06/2020 Updated: 07/11/2023
CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10
CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9
VMScore: 445
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
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Vulnerability Summary

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.

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coturn project coturn

debian debian linux 8.0

debian debian linux 9.0

debian debian linux 10.0

fedoraproject fedora 31

fedoraproject fedora 32

canonical ubuntu linux 18.04

canonical ubuntu linux 19.10

canonical ubuntu linux 20.04

canonical ubuntu linux 16.04

opensuse leap 15.2

Vendor Advisories

Debian Security Advisories: DSA-4711-1 coturn -- security update
Several vulnerabilities were discovered in coturn, a TURN and STUN server for VoIP CVE-2020-4067 Felix Doerre reported that the STUN response buffer was not properly initialised, which could allow an attacker to leak bytes in the padding bytes from the connection of another client CVE-2020-6061 Aleksandar Nikolic reported that a ...

References

CWE-665https://github.com/coturn/coturn/blob/aab60340b201d55c007bcdc853230f47aa2dfdf1/ChangeLog#L15https://github.com/coturn/coturn/security/advisories/GHSA-c8r8-8vp5-6gcmhttps://github.com/coturn/coturn/issues/583https://www.debian.org/security/2020/dsa-4711https://lists.debian.org/debian-lts-announce/2020/07/msg00002.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00010.htmlhttps://usn.ubuntu.com/4415-1/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNJJO77ZLGGFJWNUGP6VDG5HPAC5UDBK/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5G35UBNSRLL6SYRTODYTMBJ65TLQILUM/https://www.debian.org/security/2020/dsa-4711https://nvd.nist.gov
CVSSv3
CVSSv2
CVSSv3
VMScore
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