Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.
First Last Prev Next    This bug is not in your last search results.
Bug 1355654 - (CVE-2016-6198) CVE-2016-6198 kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs
CVE-2016-6198 kernel: vfs: missing detection of hardlinks in vfs_rename() on ...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
: ---
: ---
Assigned To: Red Hat Product Security
impact=moderate,public=20160711,repor...
: Security
Depends On: 1258556 1341795 1355655
Blocks: 1355693
  Show dependency tree / graph
 
Reported: 2016-07-12 03:30 EDT by Martin Prpič
Modified: 2018-08-28 18:07 EDT (History)
32 users (show)

See Also:
Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found that the vfs_rename() function did not detect hard links on overlayfs. A local, unprivileged user could use the rename syscall on overlayfs on top of xfs to crash the system.
Story Points: ---
Clone Of:
Environment:
Last Closed:
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Add an attachment (proposed patch, testcase, etc.)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2574 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2016-11-03 08:06:10 EDT
Red Hat Product Errata RHSA-2016:2584 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2016-11-03 08:08:49 EDT

  None (edit)
Description Martin Prpič 2016-07-12 03:30:51 EDT 
It was found that the vfs_rename() function did not detect hard links on overlayfs. A local, unprivileged user could use the rename syscall on overlayfs on top of xfs to crash the system.

Upstream patches:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d5ca871e72f2bb172ec9323497f01cd5091ec7
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca

CVE assignment:

http://seclists.org/oss-sec/2016/q3/42
Comment 1 Martin Prpič 2016-07-12 03:31:30 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1355655]
Comment 2 Martin Prpič 2016-07-12 10:01:30 EDT 
Acknowledgments:

Name: CAI Qian (Red Hat)
Comment 3 Wade Mealing 2016-07-22 03:14:27 EDT 
Statement: 

This issue is not present in the Linux kernel packages as shipped with Red Hat Enterprise Linux versions 5 and 6.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2. Future Linux kernel updates for the respective releases may address this issue.
Comment 8 errata-xmlrpc 2016-11-03 13:07:34 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2574 https://rhn.redhat.com/errata/RHSA-2016-2574.html
Comment 9 errata-xmlrpc 2016-11-03 15:55:17 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2584 https://rhn.redhat.com/errata/RHSA-2016-2584.html
Comment 10 errata-xmlrpc 2016-11-03 17:37:11 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2574 https://rhn.redhat.com/errata/RHSA-2016-2574.html
Comment 11 errata-xmlrpc 2016-11-03 17:44:49 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2584 https://rhn.redhat.com/errata/RHSA-2016-2584.html
Note You need to log in before you can comment on or make changes to this bug.
First Last Prev Next    This bug is not in your last search results.