Stack-based buffer overflow in Trust-DNS-Server - #VU24076
Published: January 8, 2020
Vulnerability identifier: #VU24076
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Benjamin Fry
Affected software:
Trust-DNS-Server
Trust-DNS-Server
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error when processing additional records for return of MX or SRV record types from the server. A remote unauthenticated attacker can trigger stack-based buffer overflow and cause a denial of service condition on the target system.
Note: This is only possible when a zone is configured with a null target for MX or SRV records, i.e. ".".
Example affected zone record:
no-service 86400 IN MX 0 .
Remediation
Install updates from vendor's website.