CVE-2018-12633
CVSS V2 Medium 6.3
CVSS V3 Medium 6.3
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.
Overview
- CVE ID
- CVE-2018-12633
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2018-06-22T00:29:00
- Last Modified Date
- 2018-08-21T15:42:37
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 4.17.2 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:M/Au:N/C:C/I:N/A:C
- Access Vector
- LOCAL
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- NONE
- Availability Impact
- COMPLETE
- Base Score
- 6.3
- Severity
- MEDIUM
- Exploitability Score
- 3.4
- Impact Score
- 9.2
CVSS Version 3
- Version
- 3.0
- Vector String
- CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- HIGH
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 6.3
- Base Severity
- MEDIUM
- Exploitability Score
- 1
- Impact Score
- 5.2
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/torvalds/linux/commit/bd23a7269834dc7c1f93e83535d16ebc44b75eba | Patch Third Party Advisory |
| https://bugzilla.kernel.org/show_bug.cgi?id=200131 | Issue Tracking Vendor Advisory |
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bd23a7269834dc7c1f93e83535d16ebc44b75eba | Patch Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2018-12633 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12633 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 18:39:04 | Added to TrackCVE | |||
| 2022-12-03 08:20:57 | 2018-06-22T00:29Z | 2018-06-22T00:29:00 | CVE Published Date | updated |
| 2022-12-03 08:20:57 | 2018-08-21T15:42:37 | CVE Modified Date | updated | |
| 2022-12-03 08:20:57 | Analyzed | Vulnerability Status | updated |