#VU12426 Improper input validation in NetBSD

Vulnerability identifier: #VU12426

Vulnerability risk: Medium

CVSSv4.0: 6.6 [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: N/A

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
NetBSD
Operating systems & Components / Operating system

Vendor: NetBSD Foundation, Inc

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to a miscomputation in an IPsec function in charge of handling mbufs that results in the wrong length being stored in the mbuf header. A remote attacker can send specially crafted data and cause the service to crash when at least ESP is active.

Mitigation
Install update from vendor's website.

Vulnerable software versions

NetBSD: 6.0 - 7.1.2

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External links
https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2018-007.txt.asc

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.