Bug 1421638 (CVE-2017-5970)

Summary: CVE-2017-5970 kernel: ipv4: Invalid IP options could cause skb->dst drop
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: aquini, arm-mgr, bhu, dhoward, fhrbata, gansalmon, hwkernel-mgr, iboverma, ichavero, itamar, jcm, jforbes, jkacur, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, madhu.chinakonda, matt, mchehab, mcressma, nmurray, pholasek, plougher, rt-maint, rvrbovsk, slawomir, vdronov, williams, wmealing
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the Linux kernel where having malicious IP options present would cause the ipv4_pktinfo_prepare() function to drop/free the dst. This could result in a system crash or possible privilege escalation.
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-08 03:07:30 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: 1433198, 1433199, 1433200, 1433201    
Bug Blocks: 1421640    

Description Andrej Nemec 2017-02-13 10:37:57 UTC
A vulnerability was found in the Linux kernel. A remote attacker that can send packets containing malicious IP options could cause the ipv4_pktinfo_prepare() function to drop/free the dst. This could result in a system crash or possible privilege escalation if the attacker is able to place crafted objects in this dropped location.

Upstream patch:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=34b2cef20f19c87999fff3da4071e66937db9644

References:

http://seclists.org/oss-sec/2017/q1/414
https://patchwork.ozlabs.org/patch/724136/

Comment 3 Wade Mealing 2017-03-17 04:08:51 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1433198]

Comment 5 Wade Mealing 2017-03-17 04:36:49 UTC
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 as the code which can trigger the flaw is not present in the products listed.

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 might address this issue.

Comment 6 Justin M. Forbes 2017-03-17 12:24:22 UTC
This was fixed in Fedora with the 4.9.11 updates that went to stable releases 2017-02-24.

Comment 7 errata-xmlrpc 2017-08-01 19:12:46 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2077

Comment 8 errata-xmlrpc 2017-08-02 07:52:57 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:1842

Comment 9 errata-xmlrpc 2017-09-06 20:39:53 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:2669 https://access.redhat.com/errata/RHSA-2017:2669