TCP Packet Vulnerability in OpenBSD Affects Kernel Stability
CVE-2023-27567

7.5HIGH

Key Information:

Vendor

OpenBSD
Status
OpenBSD
Vendor
CVE Published:
3 March 2023

What is CVE-2023-27567?

In OpenBSD 7.2, a vulnerability exists when a TCP packet targeting destination port 0 is processed under a pf divert-to rule, potentially leading to a kernel crash. This situation can be exploited to disrupt the system’s stability, allowing for operational challenges and potential service interruptions. Immediate attention and patching are recommended to safeguard against this issue.

References

https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/01...
https://github.com/openbsd/src/commit/0a543725ccdd2a01669...
https://security.netapp.com/advisory/ntap-20230406-0001/

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.