CVE-2022-23092
The implementation of lib9p's handling of RWALK messages was missing a bounds check needed when unpacking the message contents.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.65%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The implementation of lib9p's handling of RWALK messages was missing a bounds check needed when unpacking the message contents. The missing check means that the receipt of a specially crafted message will cause lib9p to overwrite unrelated memory. The bug can be triggered by a malicious bhyve guest kernel to overwrite memory in the bhyve(8) process. This could potentially lead to user-mode code execution on the host, subject to bhyve's Capsicum sandbox.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.65% probability · 49th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- freebsd/freebsd
- Source
- secteam@freebsd.org
References
- https://security.freebsd.org/advisories/FreeBSD-SA-22:12.lib9p.ascVendor Advisory
- https://security.netapp.com/advisory/ntap-20240415-0009/Third Party Advisory
- https://security.freebsd.org/advisories/FreeBSD-SA-22:12.lib9p.ascVendor Advisory
- https://security.netapp.com/advisory/ntap-20240415-0009/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.