Multiple vulnerabilities in NetBSD

Published: 2018-05-27

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	N/A
CWE-ID	CWE-190 CWE-416
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	NetBSD Operating systems & Components / Operating system
Vendor	NetBSD Foundation, Inc

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Interger overflow

EUVDB-ID: #VU13017

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to integer overflow when parsing IPv6 options in the packet within NPF. A remote attacker modify IPv6 headers and bypass L4 rules for all incoming packets.

Mitigation

Install update from vendor's website.

Vulnerable software versions

NetBSD: 6.0 - 7.1.2

External links

http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2018-008.txt.asc

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.

2) Use-after-free

EUVDB-ID: #VU13018

Risk: Medium

CVSSv3.1: 8.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H/E:U/RL:O/RC:C]