Information disclosure in OpenBSD kernel



Published: 2022-01-06
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-35000
CWE-ID CWE-200
Exploitation vector Local
Public exploit N/A
Vulnerable software
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Operating systems & Components / Operating system

Vendor OpenBSD

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU59273

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-35000

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to an error within the implementation of multicast routing in OpenBSD kernel. A local user can run a specially crafted program to gain access to sensitive kernel memory.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenBSD: 7.0

External links

http://www.zerodayinitiative.com/advisories/ZDI-22-012/


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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



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