Bug 1364971 (CVE-2016-3841) - CVE-2016-3841 kernel: use-after-free via crafted IPV6 sendmsg for raw / tcp / udp / l2tp sockets.
Summary: CVE-2016-3841 kernel: use-after-free via crafted IPV6 sendmsg for raw / tcp /...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-3841
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1286695 1312740 1364972 1366974 1374026
Blocks: 1364973
TreeView+ depends on / blocked
 
Reported: 2016-08-08 10:02 UTC by Martin Prpič
Modified: 2019-09-29 13:54 UTC (History)
33 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
It was found that the Linux kernel's IPv6 implementation mishandled socket options. A local attacker could abuse concurrent access to the socket options to escalate their privileges, or cause a denial of service (use-after-free and system crash) via a crafted sendmsg system call.
Clone Of:
Environment:
Last Closed: 2019-06-08 02:57:24 UTC


Attachments (Terms of Use)


Links
System ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2574 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2016-11-03 12:06:10 UTC
Red Hat Product Errata RHSA-2016:2584 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2016-11-03 12:08:49 UTC
Red Hat Product Errata RHSA-2016:2695 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2016-11-09 21:48:29 UTC

Description Martin Prpič 2016-08-08 10:02:29 UTC
It was found that the Linux kernel's IPv6 implementation mishandles socket option data. A local attacker can abuse concurrent access to the socket options to escalate their privileges, or cause a denial of service (use-after-free and system crash) via a crafted sendmsg system call.

Upstream patch:

https://github.com/torvalds/linux/commit/45f6fad84cc305103b28d73482b344d7f5b76f39

Comment 1 Martin Prpič 2016-08-08 10:02:50 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1364972]

Comment 2 Justin M. Forbes 2016-08-08 17:41:20 UTC
This was fixed in upstream 4.4 kernels. All Fedora releases are currently shipping newer kernels than this which contain the listed fix.

Comment 6 Wade Mealing 2016-08-15 08:08:47 UTC
Statement:

This issue affects Red Hat Enterprise Linux 6 and 7 kernels.  This issue was fixed in a version 6 prior to this issue being raised.

As this issue is rated as important, it has been scheduled to be fixed in a future version of Red Hat Enterprise Linux 7.

Comment 12 errata-xmlrpc 2016-11-03 17:24:19 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2574 https://rhn.redhat.com/errata/RHSA-2016-2574.html

Comment 13 errata-xmlrpc 2016-11-03 19:56:43 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2584 https://rhn.redhat.com/errata/RHSA-2016-2584.html

Comment 16 errata-xmlrpc 2016-11-09 16:50:55 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.2 Extended Update Support

Via RHSA-2016:2695 https://rhn.redhat.com/errata/RHSA-2016-2695.html


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