Bug 1747334 (CVE-2019-15666)

Summary: CVE-2019-15666 kernel: out-of-bounds array access in __xfrm_policy_unlink
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: acaringi, airlied, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mickygough, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, sdubroca, steved, williams, wmealing, yozone
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel. When xfrm policy removal occurs a system crash could occur. These policy changes generally occur through the ip command or a netlink socket.
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-04-16 16:31:57 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: 1718812, 1747335, 1803667, 1803668, 1803669, 1803670, 1803671    
Bug Blocks: 1747336    

Description Dhananjay Arunesh 2019-08-30 07:12:00 UTC
A flaw regarding the removal of xfrm policies from the kernel may possibly crash the system or corrupt memory or escalate privilges . Policies addition or removal is a privileged operation (usually done through the ip command) or via a netlink socket.

A local privileged user (with CAP_NET_ADMIN or root) is required to exploit this condition.  With this limitation, this issue is rated as Moderate.


Comment 1 Dhananjay Arunesh 2019-08-30 07:12:17 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1747335]

Comment 2 Justin M. Forbes 2019-08-30 12:14:14 UTC
This was fixed for Fedora with the 5.0.19 stable update

Comment 8 Eric Christensen 2020-03-02 21:48:25 UTC

A local privileged user (with CAP_NET_ADMIN or root) is required to exploit this condition. With this limitation, this issue is rated as Moderate.

Comment 9 errata-xmlrpc 2020-04-16 14:38:38 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1493 https://access.redhat.com/errata/RHSA-2020:1493

Comment 10 Product Security DevOps Team 2020-04-16 16:31:57 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):