Bug 1583314 (CVE-2018-11508) - CVE-2018-11508 kernel: Missing initialization in kernel/compat.c:compat_get_timex() allows local attacker to obtain possibly sensitive information via adjtimex
Summary: CVE-2018-11508 kernel: Missing initialization in kernel/compat.c:compat_get_t...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-11508
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1583315 1583316 1588729
Blocks: 1583317
TreeView+ depends on / blocked
 
Reported: 2018-05-28 16:47 UTC by Adam Mariš
Modified: 2021-10-21 20:05 UTC (History)
38 users (show)

Fixed In Version: kernel 4.16.9, kernel 4.17
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the compat_get_timex function in kernel/compat.c in the Linux kernel. A local user could use this flaw to obtain possibly sensitive information from kernel memory via adjtimex system call.
Clone Of:
Environment:
Last Closed: 2021-10-21 20:05:07 UTC
Embargoed:

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Description Adam Mariš 2018-05-28 16:47:50 UTC 
The compat_get_timex function in kernel/compat.c in the Linux kernel allows local users to obtain possibly sensitive information from a kernel memory via adjtimex system call.

Reference (includes PoC):

https://bugs.chromium.org/p/project-zero/issues/detail?id=1574

Introduced by:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3a4d44b6162555070194e486ff6b3799a8d323a2

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a0b98734479aa5b3c671d5190e86273372cab95
Comment 1 Adam Mariš 2018-05-28 16:48:46 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1583315]
Comment 3 Justin M. Forbes 2018-05-29 12:51:55 UTC 
This was fixed for Fedora users with the 4.16.9 stable update.
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