Bug 1581637 (CVE-2017-13305) - CVE-2017-13305 kernel: Buffer over-read in keyring subsystem allows exposing potentially sensitive information to local attacker
Summary: CVE-2017-13305 kernel: Buffer over-read in keyring subsystem allows exposing ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-13305
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1582985
Blocks: 1581641
TreeView+ depends on / blocked
 
Reported: 2018-05-23 09:32 UTC by Adam Mariš
Modified: 2021-02-17 00:16 UTC (History)
42 users (show)

Fixed In Version: kernel 4.12
Clone Of:
Environment:
Last Closed: 2019-06-10 10:26:24 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2165 0 None None None 2018-07-10 17:17:10 UTC

Description Adam Mariš 2018-05-23 09:32:20 UTC 
A flaw was found in the Linux kernels implementation of valid_master_desc() in which a memory buffer would be compared to a userspace value with an incorrect size of comparison.  By bruteforcing the comparison an attacker could determine what was in memory after the description.

This could allow a local attacker to obtain possibly sensitive information from kernel memory.

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=794b4bc292f5d31739d89c0202c54e7dc9bc3add
Comment 4 errata-xmlrpc 2018-07-10 17:16:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2018:2165 https://access.redhat.com/errata/RHSA-2018:2165
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