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Vulnerability Details : CVE-2018-12633

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.
Publish Date : 2018-06-21 Last Update Date : 2018-08-21
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- CVSS Scores & Vulnerability Types

CVSS Score
6.3
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of ServiceObtain Information
CWE ID 362

- Products Affected By CVE-2018-12633

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 4.17.2 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1

- References For CVE-2018-12633

https://github.com/torvalds/linux/commit/bd23a7269834dc7c1f93e83535d16ebc44b75eba
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bd23a7269834dc7c1f93e83535d16ebc44b75eba
https://bugzilla.kernel.org/show_bug.cgi?id=200131

- Metasploit Modules Related To CVE-2018-12633

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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