NULL pointer dereference in coTURN - CVE-2020-6062

Vulnerability identifier: #VU25493

CSH Severity: Medium

CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-6062

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when web server parses POST requests. A remote attacker can send a specially crafted HTTP request and perform a denial of service (DoS) attack.

coTURN
Debian Linux
Fedora
Ubuntu
coturn (Ubuntu package)
coturn (Debian package)
coturn

Install update from vendor's website.

coTURN - update to 4.5.1.2
coturn (Ubuntu package) - addressed in versions 4.5.0.3-1ubuntu0.3, 4.5.0.7-1ubuntu2.18.04.2, 4.5.1.1-1.1ubuntu0.19.10.1, 4.5.1.1-1.1ubuntu0.20.04.1
coturn (Debian package) - addressed in versions 4.5.0.5-1+deb9u2, 4.5.1.1-1.1+deb10u1
coturn - addressed in versions 4.5.1.1-3.el7, 4.5.1.1-3.el8, 4.5.1.1-3.fc30, 4.5.1.1-3.fc31, 4.5.1.1-3.fc32

• https://talosintelligence.com/vulnerability_reports/TALOS-2020-0985
• https://github.com/coturn/coturn/blob/master/ChangeLog

• Multiple vulnerabilities in CoTURN
• Debian update for coturn
• Ubuntu update for coturn
• Fedora 32 update for coturn
• Fedora 31 update for coturn
• Fedora 30 update for coturn
• Fedora EPEL 8 update for coturn
• Fedora EPEL 7 update for coturn