CVE-2020-4067

HIGH EPSS 76.4%
Published Jun 29, 20206y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Jun 29, 2020 6y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
76.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-665

Affected Products 11

VendorProductVersionRange
coturn_projectcoturn* <4.5.1.3
debiandebian_linux8.0any
debiandebian_linux9.0any
debiandebian_linux10.0any
fedoraprojectfedora31any
fedoraprojectfedora32any
canonicalubuntu_linux16.04any
canonicalubuntu_linux18.04any
canonicalubuntu_linux19.10any
canonicalubuntu_linux20.04any
opensuseleap15.2any

References 9

  • lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00010.html
    Mailing ListThird Party Advisory
  • github.com https://github.com/coturn/coturn/blob/aab60340b201d55c007bcdc853230f47aa2dfdf1/ChangeLog#L15
    Release Notes
  • github.com https://github.com/coturn/coturn/issues/583
    Issue TrackingThird Party Advisory
  • github.com https://github.com/coturn/coturn/security/advisories/GHSA-c8r8-8vp5-6gcm
    Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2020/07/msg00002.html
    Mailing ListThird Party Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5G35UBNSRLL6SYRTODYTMBJ65TLQILUM/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNJJO77ZLGGFJWNUGP6VDG5HPAC5UDBK/
  • usn.ubuntu.com https://usn.ubuntu.com/4415-1/
    Third Party Advisory
  • debian.org https://www.debian.org/security/2020/dsa-4711
    Third Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.