#VU53609 Input validation error in DHCP - CVE-2021-25217
Published: May 27, 2021
Vulnerability identifier: #VU53609
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-25217
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerable software:
DHCP
DHCP
Software vendor:
ISC
ISC
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack or gain access to sensitive information.
The vulnerability exists due to insufficient validation of options data stored in DHCP leases. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack or gain access to sensitive information.
Both dhcpd and dhclient are affected by the vulnerability.
Remediation
Install updates from vendor's website.