VDB
CVE-2018-12633
CVE-2018-12633
PUBLISHED
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.
EPSS 0.03% · 7.8th percentile
Risk Scores
EPSS Score
0.03%
7.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | 5.15.0-1073.75, 0 |
| Ubuntu:22.04:LTS | virtualbox | 6.1.28-dfsg-1, 6.1.30-dfsg-1, 6.1.32-dfsg-1 |
| Ubuntu:16.04:LTS | virtualbox | 5.0.18-dfsg-2build1, 5.0.24-dfsg-0ubuntu1.16.04.1, 5.0.32-dfsg-0ubuntu1.16.04.2 |
| Ubuntu:22.04:LTS | linux-realtime | 0, 5.15.0-1032.35 |
| Ubuntu:25.10 | virtualbox | *, 7.2.2-dfsg-2, 7.2.0-dfsg-3 |
| Ubuntu:20.04:LTS | virtualbox | *, 0, 6.0.14-dfsg-1 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | 6.8.0-2019.20, 0 |
| Ubuntu:24.04:LTS | virtualbox | 7.0.10-dfsg-3, 7.0.12-dfsg-1, 7.0.14-dfsg-2 |
| Ubuntu:18.04:LTS | virtualbox | 5.2.8-dfsg-7, 5.2.10-dfsg-5, * |
Exploit Intelligence
- A technical case study and exploitation analysis of the Authentication Bypass vulnerability in TP-Link TL-WR840N firmware (CVE-2018-12633). (github-poc-repo)
- A technical case study and exploitation analysis of the Authentication Bypass vulnerability in TP-Link TL-WR840N firmware (CVE-2018-12633). (github-poc-repo)
- A technical case study and exploitation analysis of the Authentication Bypass vulnerability in TP-Link TL-WR840N firmware (CVE-2018-12633). (github-poc-repo)
- A technical case study and exploitation analysis of the Authentication Bypass vulnerability in TP-Link TL-WR840N firmware (CVE-2018-12633). (github-poc-repo)
- A technical case study and exploitation analysis of the Authentication Bypass vulnerability in TP-Link TL-WR840N firmware (CVE-2018-12633). (github-poc-repo)
- A technical case study and exploitation analysis of the Authentication Bypass vulnerability in TP-Link TL-WR840N firmware (CVE-2018-12633). (github-poc-repo)
- A technical case study and exploitation analysis of the Authentication Bypass vulnerability in TP-Link TL-WR840N firmware (CVE-2018-12633). (github-poc)
- A technical case study and exploitation analysis of the Authentication Bypass vulnerability in TP-Link TL-WR840N firmware (CVE-2018-12633). (github-poc)
- A technical case study and exploitation analysis of the Authentication Bypass vulnerability in TP-Link TL-WR840N firmware (CVE-2018-12633). (github-poc)
- A technical case study and exploitation analysis of the Authentication Bypass vulnerability in TP-Link TL-WR840N firmware (CVE-2018-12633). (github-poc)
…and 4 more exploits
Timeline
- Jun 22, 2018 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Feb 28, 2022 EPSS Score
- May 2, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 5, 2022 EPSS Score
- Nov 6, 2022 EPSS Score
- Jan 8, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2018-12633 third-party-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bd23a7269834dc7c1f93e83535d16ebc44b75eba third-party-advisory
- https://bugzilla.kernel.org/show_bug.cgi?id=200131 third-party-advisory
- https://github.com/torvalds/linux/commit/bd23a7269834dc7c1f93e83535d16ebc44b75eba third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2018-12633 third-party-advisory