CVE-2016-2117: Infoleak
First published: Fri Feb 26 2016(Updated: )
It was reported that due to buffer overflow, it is possible for remote TCP endpoint to trigger the opposite TCP endpoint to write to a socket in sequence which causes the ethernet driver to send arbitrary kernel data over the ethernet interface instead of a portion of the intended packet data. Initially this issue was believed to be present in a number of mainline drivers in 3.10.x and 4.4.2 vanilla kernel sources. After further investigation it was found that only [atl2] driver (code in drivers/net/ethernet/atheros/atlx/atl2.c) from the list of suspected drivers is vulnerable. As a result, certain conditions should be met to trigger the issue: - the [atl2] driver and the corresponding network card (which believed to be not so frequently used) should be present on the target system - an application should make such a sequence of calls that a network buffer for the data to be transmitted is scattered - hardware checksumming should be enabled so the packet checksum is correct The above makes this vulnerability less probable to be hit.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Oracle VM Server | =3.3 | |
| Oracle VM Server | =3.4 | |
| Canonical Ubuntu Linux | =12.04 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =15.10 | |
| Canonical Ubuntu Linux | =16.04 | |
| Linux Linux kernel | <=4.5.2 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f43bfaeddc79effbf3d0fcb53ca477cca66f3db8
- http://rhn.redhat.com/errata/RHSA-2016-2574.html
- http://rhn.redhat.com/errata/RHSA-2016-2584.html
- http://www.debian.org/security/2016/dsa-3607
- http://www.openwall.com/lists/oss-security/2016/03/16/7
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/84500
- http://www.ubuntu.com/usn/USN-2989-1
- http://www.ubuntu.com/usn/USN-2998-1
- http://www.ubuntu.com/usn/USN-3000-1
- http://www.ubuntu.com/usn/USN-3001-1
- http://www.ubuntu.com/usn/USN-3002-1
- http://www.ubuntu.com/usn/USN-3003-1
- http://www.ubuntu.com/usn/USN-3004-1
- http://www.ubuntu.com/usn/USN-3005-1
- http://www.ubuntu.com/usn/USN-3006-1
- http://www.ubuntu.com/usn/USN-3007-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1312298
- https://github.com/torvalds/linux/commit/f43bfaeddc79effbf3d0fcb53ca477cca66f3db8
- https://launchpad.net/bugs/cve/CVE-2016-2117
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1318336
- http://seclists.org/oss-sec/2016/q1/658
- https://rhn.redhat.com/errata/RHSA-2016-2574.html
- https://rhn.redhat.com/errata/RHSA-2016-2584.html
- https://git.kernel.org/linus/ec5f061564238892005257c83565a0b58ec79295
- https://www.openwall.com/lists/oss-security/2016/03/16/7
- https://security-tracker.debian.org/tracker/CVE-2016-2117
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2117
- https://nvd.nist.gov/vuln/detail/CVE-2016-2117
- https://ubuntu.com/security/CVE-2016-2117
Frequently Asked Questions
What is CVE-2016-2117?
CVE-2016-2117 is a vulnerability in the Linux kernel that allows remote attackers to obtain sensitive information from kernel memory.
Which versions of the Linux kernel are affected by CVE-2016-2117?
The Linux kernel versions through 4.5.2 are affected by CVE-2016-2117.
How severe is CVE-2016-2117?
CVE-2016-2117 has a severity level of low.
How can I fix CVE-2016-2117?
To fix CVE-2016-2117, update your Linux kernel to version 4.6~ or higher.
Where can I find more information about CVE-2016-2117?
You can find more information about CVE-2016-2117 at the following references: [1] [2] [3].
- collector/nvd-index
- agent/type
- agent/remedy
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2016-2117
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- source/Debian
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- vendor/oracle
- canonical/oracle vm server
- version/oracle vm server/3.3
- version/oracle vm server/3.4
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/12.04
- version/canonical ubuntu linux/14.04
- version/canonical ubuntu linux/15.10
- version/canonical ubuntu linux/16.04
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/4.5.2
- package-manager/debian