#VU53024 Out-of-bounds write in Unbound - CVE-2019-25035

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Main Vulnerability Database Vulnerabilities #VU53024

#VU53024 Out-of-bounds write in Unbound - CVE-2019-25035

Published: May 10, 2021


Vulnerability identifier: #VU53024
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2019-25035
CWE-ID: CWE-787
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 compromise vulnerable system.

The vulnerability exists due to a boundary error within the sldns_bget_token_par() function in sldns/parse.c. A remote attacker can send specially crafted data to the DNS server, trigger out-of-bounds write and execute arbitrary code on the target system.


Remediation

Install updates from vendor's website.

External links