CVE-2018-19333
pkg/sentry/kernel/shm/shm.go in Google gVisor before 2018-11-01 allows attackers to overwrite memory locations in processes running as root (but not escape the sandbox) via vectors involving IPC_RMID shmctl calls, because reference counting is mishandled.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.81%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
pkg/sentry/kernel/shm/shm.go in Google gVisor before 2018-11-01 allows attackers to overwrite memory locations in processes running as root (but not escape the sandbox) via vectors involving IPC_RMID shmctl calls, because reference counting is mishandled.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.81% probability · 55th percentile
- CISA KEV
- Not listed
- Affected
- google/gvisor
- Source
- cve@mitre.org
References
- https://github.com/google/gvisor/commit/0e277a39c8b6f905e289b75e8ad0594e6b3562caPatch, Third Party Advisory
- https://justi.cz/security/2018/11/14/gvisor-lpe.htmlExploit, Third Party Advisory
- https://github.com/google/gvisor/commit/0e277a39c8b6f905e289b75e8ad0594e6b3562caPatch, Third Party Advisory
- https://justi.cz/security/2018/11/14/gvisor-lpe.htmlExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.