CVE-2016-10012: Buffer Overflow
First published: Tue Dec 20 2016(Updated: )
It was found that the shared memory manager used by pre-authentication compression support had a bounds checks that could be elided by some optimising compilers. Additionally, this memory manager was incorrectly accessible when pre-authentication compression was disabled. This could potentially allow attacks against the privileged monitor process from the sandboxed privilege-separation process (a compromise of the latter would be required first). CVE assignment: <a href="http://seclists.org/oss-sec/2016/q4/708">http://seclists.org/oss-sec/2016/q4/708</a> External References: <a href="https://www.openssh.com/txt/release-7.4">https://www.openssh.com/txt/release-7.4</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/openssh | <7.4 | 7.4 |
| ubuntu/openssh | <1:6.6 | 1:6.6 |
| ubuntu/openssh | <1:7.4 | 1:7.4 |
| ubuntu/openssh | <1:7.2 | 1:7.2 |
| debian/openssh | 1:8.4p1-5+deb11u3 1:9.2p1-2+deb12u2 1:9.2p1-2+deb12u3 1:9.8p1-2 | |
| OpenSSH | <=7.3 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2016/12/19/2
- http://www.securityfocus.com/bid/94975
- http://www.securitytracker.com/id/1037490
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.647637
- https://access.redhat.com/errata/RHSA-2017:2029
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://github.com/openbsd/src/commit/3095060f479b86288e31c79ecbc5131a66bcd2f9
- https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
- https://security.netapp.com/advisory/ntap-20171130-0002/
- https://support.f5.com/csp/article/K62201745?utm_source=f5support&utm_medium=RSS
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03818en_us
- https://www.openssh.com/txt/release-7.4
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.647637
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03818en_us
- https://support.f5.com/csp/article/K62201745?utm_source=f5support&amp;utm_medium=RSS
- https://launchpad.net/bugs/cve/CVE-2016-10012
- https://support.f5.com/csp/article/K62201745?utm_source=f5support&%3Butm_medium=RSS
- http://seclists.org/oss-sec/2016/q4/708
- http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/monitor.c.diff?r1=1.165&r2=1.166
- http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/monitor.h.diff?r1=1.19&r2=1.20
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1406296
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1406293#c5
- https://access.redhat.com/support/
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1306453&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1306453&action=edit
- https://access.redhat.com/security/cve/CVE-2016-10012
- https://bugzilla.redhat.com/show_bug.cgi?id=1406293
- https://security-tracker.debian.org/tracker/CVE-2016-10012
- https://ubuntu.com/security/notices/USN-3538-1
- https://www.cve.org/CVERecord?id=CVE-2016-10012
- https://nvd.nist.gov/vuln/detail/CVE-2016-10012
- https://github.com/openssh/openssh-portable/commit/0082fba4efdd492f765ed4c53f0d0fbd3bdbdf7f
- https://github.com/openssh/openssh-portable/commit/4577adead6a7d600c8e764619d99477a08192c8f
- https://github.com/openssh/openssh-portable/commit/b7689155f3f5c4999846c07a852b1c7a43b09cec
- https://ubuntu.com/security/CVE-2016-10012
Frequently Asked Questions
What is the severity of CVE-2016-10012?
CVE-2016-10012 has a medium severity rating due to its potential to expose memory vulnerabilities.
How do I fix CVE-2016-10012?
To fix CVE-2016-10012, upgrade your OpenSSH package to at least version 7.4 for Red Hat and the specified versions for Ubuntu and Debian.
What vulnerability does CVE-2016-10012 address?
CVE-2016-10012 addresses a potential security flaw in the shared memory manager used by OpenSSH that could be exploited when pre-authentication compression is enabled.
Which versions of OpenSSH are affected by CVE-2016-10012?
CVE-2016-10012 affects OpenSSH versions prior to 7.4 for Red Hat and other corresponding versions for Ubuntu and Debian.
Is CVE-2016-10012 a critical vulnerability?
CVE-2016-10012 is not classified as critical but requires prompt attention due to its potential security implications.
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