CVE-2016-7042: Buffer Overflow
First published: Wed Sep 07 2016(Updated: )
It was found that when gcc stack protector is turned on, proc_keys_show() can cause a panic due to stack corruption. This happens because xbuf[] is not big enough to hold a 64-bit timeout rendered as weeks. Product bug: <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED INSUFFICIENT_DATA - CVE-2016-7042 kernel: kernel panic due to stack corruption detected while reading /proc/keys after few operations with kernel keys [fedora-all]" href="show_bug.cgi?id=1373499">https://bugzilla.redhat.com/show_bug.cgi?id=1373499</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <0:2.6.32-696.el6 | 0:2.6.32-696.el6 |
| redhat/kernel-rt | <0:3.10.0-693.rt56.617.el7 | 0:3.10.0-693.rt56.617.el7 |
| redhat/kernel | <0:3.10.0-693.el7 | 0:3.10.0-693.el7 |
| redhat/kernel-rt | <1:3.10.0-693.2.1.rt56.585.el6 | 1:3.10.0-693.2.1.rt56.585.el6 |
| Linux Linux kernel | <=4.8.2 | |
| Google Android | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2016-7042 https://nvd.nist.gov/vuln/detail/CVE-2016-7042
- https://bugzilla.redhat.com/show_bug.cgi?id=1373966
- https://access.redhat.com/errata/RHSA-2017:0817
- https://access.redhat.com/errata/RHSA-2017:2077
- https://access.redhat.com/errata/RHSA-2017:1842
- https://access.redhat.com/errata/RHSA-2017:2669
- https://access.redhat.com/security/cve/CVE-2016-7042
- http://rhn.redhat.com/errata/RHSA-2017-0817.html
- http://www.openwall.com/lists/oss-security/2016/10/13/5
- http://www.securityfocus.com/bid/93544
- https://source.android.com/security/bulletin/2017-01-01.html
- https://launchpad.net/bugs/cve/CVE-2016-7042
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1373499
- https://access.redhat.com/support/policy/updates/errata/
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1200212&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1200212&action=edit
- https://rhn.redhat.com/errata/RHSA-2017-0817.html
- http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=03dab869b7b239c4e013ec82aea22e181e441cfc
- https://source.android.com/docs/security/bulletin/2017-01-01 (Advisory)
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7042
- https://nvd.nist.gov/vuln/detail/CVE-2016-7042
- https://security-tracker.debian.org/tracker/CVE-2016-7042
- https://ubuntu.com/security/CVE-2016-7042
- https://bugzilla.redhat.com/show_bug.cgi?id=1373499
- https://git.kernel.org/linus/03dab869b7b239c4e013ec82aea22e181e441cfc
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2016-7042?
CVE-2016-7042 is a vulnerability in the Linux kernel that allows local users to cause a denial of service (stack memory corruption and panic).
What is the severity of CVE-2016-7042?
The severity of CVE-2016-7042 is high with a CVSS score of 5.5.
Which software versions are affected by CVE-2016-7042?
Versions 3.2.0-115.157, 3.13.0-101.148, 4.4.0-47.68, 4.8.0-27.29, and 4.9~ of the Linux kernel for Ubuntu are affected by CVE-2016-7042.
How can I fix CVE-2016-7042?
To fix CVE-2016-7042, update your Linux kernel to version 3.2.0-115.157, 3.13.0-101.148, 4.4.0-47.68, 4.8.0-27.29, or 4.9~.
Where can I find more information about CVE-2016-7042?
More information about CVE-2016-7042 can be found at the following links: [link1](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1373499), [link2](https://access.redhat.com/support/policy/updates/errata/), [link3](https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1200212&action=diff).
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