CVE-2018-12633
Summary
| CVE | CVE-2018-12633 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2018-06-22 00:29:00 UTC |
| Updated | 2018-08-21 15:42:00 UTC |
| Description | An issue was discovered in the Linux kernel through 4.17.2. vbg_misc_device_ioctl() in drivers/virt/vboxguest/vboxguest_linux.c reads the same user data twice with copy_from_user. The header part of the user data is double-fetched, and a malicious user thread can tamper with the critical variables (hdr.size_in and hdr.size_out) in the header between the two fetches because of a race condition, leading to severe kernel errors, such as buffer over-accesses. This bug can cause a local denial of service and information leakage. |
Risk And Classification
Problem Types: CWE-362
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| kernel/git/torvalds/linux.git - Linux kernel source tree | MISC | git.kernel.org | Patch, Vendor Advisory |
| virt: vbox: Only copy_from_user the request-header once · torvalds/linux@bd23a72 · GitHub | MISC | github.com | Patch, Third Party Advisory |
| 200131 – Double-Fetch bug in Linux-4.16.8/drivers/virt/vboxguest/vboxguest_linux.c. | MISC | bugzilla.kernel.org | Issue Tracking, Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.