Bug 1185139 (CVE-2015-1350) - CVE-2015-1350 kernel: denial of service in notify_change for filesystem xattrs
Summary: CVE-2015-1350 kernel: denial of service in notify_change for filesystem xattrs
Status: CLOSED WONTFIX
Alias: CVE-2015-1350
Product: Security Response
Classification: Other
Component: vulnerability   
(Show other bugs)
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=low,public=20141121,reported=2...
Keywords: Security
Depends On: 1185142 1185143 1185144 1185145 1186117 1192874 1195677 1195678 1195679
Blocks: 1167369
TreeView+ depends on / blocked
 
Reported: 2015-01-23 04:53 UTC by Wade Mealing
Modified: 2016-02-14 18:42 UTC (History)
21 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
It was found that a regular user could remove xattr permissions on files by using the chown or write system calls. A local attacker could use this flaw to deny elevated permissions from valid users, services, or applications, potentially resulting in a denial of service.
Story Points: ---
Clone Of:
Environment:
Last Closed: 2015-11-02 15:33:35 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


Attachments (Terms of Use)

Description Wade Mealing 2015-01-23 04:53:23 UTC
A flaw was found where a regular user could remove xattr permissions on files by using the chown or write systemcalls.  An attacker could use this feature to remove capabilities effectively denying elevated permissions to valid users.  Certain services and applications require the capabilities subsystem to work correctly.

Discussed here: 

 https://lkml.org/lkml/2015/1/17/145

As of 3.19 release, this commit is NOT in mainline tree.

Comment 4 Wade Mealing 2015-01-27 04:33:29 UTC
Statement: 

This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7 and MRG 2.

This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata

Comment 6 Wade Mealing 2015-02-16 03:00:33 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1192874]


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