Improper input validation in NetBSD - #VU11639
Published: April 10, 2018 / Updated: April 10, 2018
Vulnerability identifier: #VU11639
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to signedness bug in NetBSD's implementation of the PF firewall. A remote attacker can send specially crafted TCP-SYN packet while PF had a configuration of the type "pass in [...] tcp [...] modulate state", trigger out-of-bounds read and cause the system to crash.
The weakness exists due to signedness bug in NetBSD's implementation of the PF firewall. A remote attacker can send specially crafted TCP-SYN packet while PF had a configuration of the type "pass in [...] tcp [...] modulate state", trigger out-of-bounds read and cause the system to crash.
Affected software
NetBSD
Remediation
Install update from vendor's website.