#VU49842 Heap-based buffer overflow in Dnsmasq - CVE-2020-25683
Published: January 20, 2021
Vulnerability identifier: #VU49842
Vulnerability risk: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2020-25683
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Dnsmasq
Dnsmasq
Software vendor:
GNU
GNU
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in rfc1035.c:extract_name(). A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and cause a denial of service condition on the target system.
Remediation
Install updates from vendor's website.