Bug 1421638 (CVE-2017-5970) - CVE-2017-5970 kernel: ipv4: Invalid IP options could cause skb->dst drop
Summary: CVE-2017-5970 kernel: ipv4: Invalid IP options could cause skb->dst drop
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-5970
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1433198 1433199 1433200 1433201
Blocks: 1421640
TreeView+ depends on / blocked
 
Reported: 2017-02-13 10:37 UTC by Andrej Nemec
Modified: 2021-02-17 02:36 UTC (History)
34 users (show)

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.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:07:30 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1842 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2017-08-01 18:22:09 UTC
Red Hat Product Errata RHSA-2017:2077 0 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2017-08-01 18:13:37 UTC
Red Hat Product Errata RHSA-2017:2669 0 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-09-07 00:36:52 UTC

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
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