Vulnerability in Coturn
CVE-2020-4067
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.
Vulnerability class: Dirty Pipe (CVE-2022-0847)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L.
EPSS exploit prediction
EPSS: 0.019 (78.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Coturn — versions >= 5.1.1, < 6.0.0
- Coturn Project
- Canonical Ubuntu Linux — versions 16.04, 18.04, 19.10
- Debian Linux — versions 8.0, 9.0, 10.0
- Fedoraproject Fedora — versions 31, 32
- openSUSE Leap — versions 15.2
Weakness classification (CWE)
References
- github.com/coturn/coturn/security/advisories/GHSA-c8r8-8vp5-6gcm (Third Party Advisory)
- github.com/coturn/coturn/issues/583 (Third Party Advisory, Issue Tracking)
- github.com/coturn/coturn/blob/aab60340b201d55c007bcdc853230f47aa2dfdf1/ChangeLog (Release Notes)
- www.debian.org/security/2020/dsa-4711 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/07/msg00002.html (mailing-list, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00010.html (vendor-advisory, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4415-1/ (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2020-4067?
- CVE-2020-4067 is a high-severity vulnerability in Coturn, classified under Improper Initialization. CVSS score: 7.0/10. Published 2020-06-29.
- How severe is CVE-2020-4067?
- High severity. CVSS v3 base score is 7.0 out of 10.