Reachable Assertion in Unbound - CVE-2019-25041

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Main Vulnerability Database Vulnerabilities #VU53029

Reachable Assertion in Unbound - CVE-2019-25041

Published: May 10, 2021


Vulnerability identifier: #VU53029
CSH Severity: Medium
CVSSv4.0: 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: CVE-2019-25041
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Unbound
Software vendor:
NLnet Labs

Description

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

The vulnerability exists due to a reachable assertion within the dname_pkt_copy() function when processing compressed names. A remote attacker can send specially crafted data to the DNS server, trigger an assertion failure and perform a denial of service (DoS) attack.


Remediation

Install updates from vendor's website.

External links