Resource exhaustion in ISC BIND - CVE-2023-4236

Vulnerability identifier: #VU80930

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-4236

CWE-ID: CWE-400

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 application does not properly control consumption of internal resources when handling DNS-over-TLS queries. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

ISC BIND
Debian Linux
Ubuntu
Fedora
Isolation Segment
VMware Tanzu Application Service for VMs
Redis for Pivotal Platform
bind
bind-dyndb-ldap
bind9 (Ubuntu package)
bind9 (Debian package)
VMware Tanzu Operations Manager

Install updates from vendor's website.

ISC BIND - addressed in versions 9.18.19, 9.18.19-S1
bind - addressed in versions 9.18.19-1.fc37, 9.18.19-1.fc38, 9.18.19-1.fc39, 9.18.19-1.fc40
bind-dyndb-ldap - addressed in versions 11.10-17.fc37, 11.10-21.fc38, 11.10-21.fc39, 11.10-21.fc40
VMware Tanzu Operations Manager - update to 3.0.17
bind9 (Ubuntu package) - addressed in versions 1:9.16.1-0ubuntu2.16, 1:9.18.12-0ubuntu0.22.04.3, 1:9.18.12-1ubuntu1.2
bind9 (Debian package) - addressed in versions 1:9.16.44-1~deb11u1, 1:9.18.19-1~deb12u1

• https://kb.isc.org/docs/cve-2023-4236

• Multiple denial of service vulnerabilities in ISC BIND
• Ubuntu update for bind9
• Debian update for bind9
• Fedora 38 update for bind, bind-dyndb-ldap
• Fedora 37 update for bind, bind-dyndb-ldap
• Fedora 40 update for bind, bind-dyndb-ldap
• Fedora 39 update for bind, bind-dyndb-ldap
• VMware Tanzu products update for Bind