Bug 1185139 (CVE-2015-1350)

Summary: CVE-2015-1350 kernel: denial of service in notify_change for filesystem xattrs
Product: [Other] Security Response Reporter: Wade Mealing <wmealing>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: agordeev, aquini, carnil, dhoward, fhrbata, gansalmon, itamar, jforbes, jonathan, jwboyer, kernel-maint, kernel-mgr, lwang, madhu.chinakonda, mchehab, mguzik, nmurray, pholasek, plougher, pmatouse, rvrbovsk
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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: --- Target Upstream Version:
Bug Depends On: 1185142, 1185143, 1185144, 1185145, 1186117, 1192874, 1195677, 1195678, 1195679    
Bug Blocks: 1167369    

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: 


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

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

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]