PT-2023-21210 · Openbsd · Openbsd

Published 2023-03-03 · Updated 2023-04-06 · CVE-2023-27567

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions OpenBSD version 7.2

Description A TCP packet with destination port 0 that matches a pf divert-to rule can crash the kernel.

Recommendations For OpenBSD version 7.2, as a temporary workaround, consider disabling the pf divert-to rule until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2023-27567

Affected Products

Openbsd

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2023-27567 · Security Note
• https://osv.dev/vulnerability/CVE-2023-27567 · Vendor Advisory
• https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/013_tcp.patch.sig · Patch
• https://github.com/openbsd/src/commit/0a543725ccdd2a01669122ce79bb67e66ede77f2 · Note
• https://security.netapp.com/advisory/ntap-20230406-0001 · Note
• https://t.me/cvenotify/45491 · Telegram Post
• https://t.me/cibsecurity/59403 · Telegram Post