VulnerabilityModified
CVE-2023-27567
In OpenBSD 7.2, a TCP packet with destination port 0 that matches a pf divert-to rule can crash the kernel.
HIGH 7.5EPSS 0.76%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.76%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In OpenBSD 7.2, a TCP packet with destination port 0 that matches a pf divert-to rule can crash the kernel.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.76% probability · 53th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- openbsd/openbsd
- Source
- cve@mitre.org
References
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/013_tcp.patch.sigPatch
- https://github.com/openbsd/src/commit/0a543725ccdd2a01669122ce79bb67e66ede77f2
- https://security.netapp.com/advisory/ntap-20230406-0001/
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/013_tcp.patch.sigPatch
- https://github.com/openbsd/src/commit/0a543725ccdd2a01669122ce79bb67e66ede77f2
- https://security.netapp.com/advisory/ntap-20230406-0001/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.