security/bulletin/2016-02-01.jd

page.title=Nexus Security Bulletin - February 2016
@jd:body

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    <h2>In this document</h2>
    <ol id="auto-toc">
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<p><em>Published February 01, 2016 | Updated February 2, 2016</em></p>

<p>We have released a security update to Nexus devices through an over-the-air
(OTA) update as part of our Android Security Bulletin Monthly Release process.
The Nexus firmware images have also been released to the <a href="https://developers.google.com/android/nexus/images">Google Developer site</a>. Builds LMY49G or later and Android M with Security Patch Level of February 1,
2016 or later address these issues. Refer to the <a href="https://support.google.com/nexus/answer/4457705">Nexus documentation</a> for instructions on how to check the security patch level.</p>

<p>Partners were notified about the issues described in the bulletin on January 4,
2016 or earlier. Where applicable, source code patches for these issues have been
released to the Android Open Source Project (AOSP) repository.</p>

<p>The most severe of these issues is a Critical security vulnerability that could
enable remote code execution on an affected device through multiple methods
such as email, web browsing, and MMS when processing media files. The Remote Code
Execution Vulnerability in Broadcom’s Wi-Fi driver is also Critical severity as
it could allow remote code execution on an affected device while connected to
the same network as the attacker.</p>

<p>We have had no reports of active customer exploitation of these newly reported
issues. Refer to the <a href="#mitigations">Mitigations</a> section for details on the <a href="https://source.android.com/security/enhancements/">Android security platform protections</a> and service protections such as SafetyNet, which improve the security of the
Android platform. We encourage all customers to accept these updates to their
devices.</p>

<h2 id=security_vulnerability_summary>Security Vulnerability Summary</h2>


<p>The table below contains a list of security vulnerabilities, the Common
Vulnerability and Exposures ID (CVE), and their assessed severity. The <a href="https://source.android.com/security/overview/updates-resources.html#severity">severity assessment</a> is based on the effect that exploiting the vulnerability would possibly have
on an affected device, assuming the platform and service mitigations are
disabled for development purposes or if successfully bypassed.</p>
<table>
 <tr>
    <th>Issue</th>
    <th>CVE</th>
    <th>Severity</th>
 </tr>
 <tr>
    <td>Remote Code Execution Vulnerability in Broadcom Wi-Fi Driver</td>
    <td>CVE-2016-0801<br />
        CVE-2016-0802</td>
    <td>Critical</td>
 </tr>
 <tr>
    <td>Remote Code Execution Vulnerability in Mediaserver</td>
    <td>CVE-2016-0803<br />
        CVE-2016-0804</td>
    <td>Critical</td>
 </tr>
 <tr>
    <td>Elevation of Privilege Vulnerability in Qualcomm Performance Module</td>
    <td>CVE-2016-0805</td>
    <td>Critical</td>
 </tr>
 <tr>
    <td>Elevation of Privilege Vulnerability in Qualcomm Wi-Fi Driver</td>
    <td>CVE-2016-0806</td>
    <td>Critical</td>
 </tr>
 <tr>
    <td>Elevation of Privilege Vulnerability in the Debugger Daemon</td>
    <td>CVE-2016-0807</td>
    <td>Critical</td>
 </tr>
 <tr>
    <td>Denial of Service Vulnerability in Minikin</td>
    <td>CVE-2016-0808</td>
    <td>High</td>
 </tr>
 <tr>
    <td>Elevation of Privilege Vulnerability in Wi-Fi</td>
    <td>CVE-2016-0809</td>
    <td>High</td>
 </tr>
 <tr>
    <td>Elevation of Privilege Vulnerability in Mediaserver</td>
    <td>CVE-2016-0810</td>
    <td>High</td>
 </tr>
 <tr>
    <td>Information Disclosure Vulnerability in libmediaplayerservice</td>
    <td>CVE-2016-0811</td>
    <td>High</td>
 </tr>
 <tr>
    <td>Elevation of Privilege Vulnerability in Setup Wizard</td>
    <td>CVE-2016-0812<br />
        CVE-2016-0813</td>
    <td>Moderate</td>
 </tr>
</table>


<h3 id=mitigations>Mitigations</h3>


<p>This is a summary of the mitigations provided by the <a href="https://source.android.com/security/enhancements/index.html">Android security platform</a> and service protections such as SafetyNet. These capabilities reduce the
likelihood that security vulnerabilities could be successfully exploited on
Android.</p>

<ul>
  <li> Exploitation for many issues on Android is made more difficult by enhancements
in newer versions of the Android platform. We encourage all users to update to
the latest version of Android where possible.
  <li> The Android Security team is actively monitoring for abuse with Verify Apps and
SafetyNet which will warn about potentially harmful applications about to be
installed. Device rooting tools are prohibited within Google Play. To protect
users who install applications from outside of Google Play, Verify Apps is
enabled by default and will warn users about known rooting applications. Verify
Apps attempts to identify and block installation of known malicious
applications that exploit a privilege escalation vulnerability. If such an
application has already been installed, Verify Apps will notify the user and
attempt to remove any such applications.
  <li> As appropriate, Google Hangouts and Messenger applications do not automatically
pass media to processes such as mediaserver.
</ul>

<h3 id=acknowledgements>Acknowledgements</h3>


<p>We would like to thank these researchers for their contributions:</p>

<ul>
  <li> Android and Chrome Security Team: CVE-2016-0809, CVE-2016-0810
  <li> Broadgate Team: CVE-2016-0801, CVE-2015-0802
  <li> David Riley of the Google Pixel C Team: CVE-2016-0812
  <li> Dongkwan Kim (<a href="mailto:dkay@kaist.ac.kr">dkay@kaist.ac.kr</a>) of System Security Lab, KAIST: CVE-2015-6614
  <li> Gengjia Chen (<a href="https://twitter.com/@chengjia4574">@chengjia4574</a>)
       of Lab IceSword, Qihoo 360: CVE-2016-0805
  <li> Hongil Kim (<a href="mailto:hongilk@kaist.ac.kr">hongilk@kaist.ac.kr</a>) of System Security Lab, KAIST: CVE-2015-6614
  <li> Qidan He (<a href="https://twitter.com/@Flanker_hqd">@Flanker_hqd</a>) of
       KeenLab (<a href="https://twitter.com/keen_lab">@keen_lab</a>), Tencent: CVE-2016-0811
  <li> Seven Shen (<a href="https://twitter.com/@lingtongshen">@lingtongshen</a>)
       of Trend Micro (<a href="http://www.trendmicro.com">www.trendmicro.com</a>): CVE-2016-0803
  <li> Weichao Sun (<a href="https://twitter.com/sunblate">@sunblate</a>) of Alibaba Inc: CVE-2016-0808
  <li> Zach Riggle (<a href="https://twitter.com/@ebeip90">@ebeip90</a>) of the Android Security Team: CVE-2016-0807
</ul>

<h2 id=security_vulnerability_details>Security Vulnerability Details</h2>


<p>In the sections below, we provide details for each of the security
vulnerabilities listed in the <a href="#security_vulnerability_summary">Security Vulnerability Summary</a>
above. There is a description of the issue, a severity rationale, and a table
with the CVE, associated bug, severity, affected versions, and date reported.
When available, we will link the AOSP commit that addressed the issue to the
bug ID. When multiple changes relate to a single bug, additional AOSP
references are linked to numbers following the bug ID.</p>

<h3 id=remote_code_execution_vulnerability_in_broadcom_wi-fi_driver>Remote Code Execution Vulnerability in Broadcom Wi-Fi Driver</h3>


<p>Multiple remote execution vulnerabilities in the Broadcom Wi-Fi driver could
allow a remote attacker to use specially crafted wireless control message
packets to corrupt kernel memory in a way that leads to remote code execution
in the context of the kernel. These vulnerabilities can be triggered when the
attacker and the victim are associated with the same network. This issue is
rated as a Critical severity due to the possibility of remote code execution in
the context of the kernel without requiring user interaction.</p>
<table>
 <tr>
    <th>CVE</th>
    <th>Bugs</th>
    <th>Severity</th>
    <th>Updated versions</th>
    <th>Date reported</th>
 </tr>
 <tr>
    <td>CVE-2016-0801</td>
    <td>ANDROID-25662029*</td>
    <td>Critical</td>
    <td>4.4.4, 5.0, 5.1.1, 6.0, 6.0.1</td>
    <td>Oct 25, 2015</td>
 </tr>
 <tr>
    <td>CVE-2016-0802</td>
    <td>ANDROID-25306181*</td>
    <td>Critical</td>
    <td>4.4.4, 5.0, 5.1.1, 6.0, 6.0.1</td>
    <td>Oct 26,2015</td>
 </tr>
</table>
<p>* The patch for this issue is not in AOSP. The update is contained in the
latest binary drivers for Nexus devices available from the <a href="https://developers.google.com/android/nexus/drivers">Google Developer site</a>.</p>

<h3 id=remote_code_execution_vulnerability_in_mediaserver>Remote Code Execution Vulnerability in Mediaserver</h3>


<p>During media file and data processing of a specially crafted file,
vulnerabilities in mediaserver could allow an attacker to cause memory
corruption and remote code execution as the mediaserver process.</p>

<p>The affected functionality is provided as a core part of the operating system
and there are multiple applications that allow it to be reached with remote
content, most notably MMS and browser playback of media.</p>

<p>This issue is rated as a Critical severity due to the possibility of remote
code execution within the context of the mediaserver service. The mediaserver
service has access to audio and video streams as well as access to privileges
that third-party apps cannot normally access.</p>
<table>
 <tr>
    <th>CVE</th>
    <th>Bugs with AOSP links</th>
    <th>Severity</th>
    <th>Updated versions</th>
    <th>Date reported</th>
 </tr>
 <tr>
    <td>CVE-2016-0803</td>
    <td><a href="https://android.googlesource.com/platform%2Fframeworks%2Fav/+/50270d98e26fa18b20ca88216c3526667b724ba7">ANDROID-25812794</a></td>
    <td>Critical</td>
    <td>4.4.4, 5.0, 5.1.1, 6.0, 6.0.1</td>
    <td>Nov 19, 2015</td>
 </tr>
 <tr>
    <td>CVE-2016-0804</td>
    <td><a href="https://android.googlesource.com/platform%2Fframeworks%2Fav/+/224858e719d045c8554856b12c4ab73d2375cf33">ANDROID-25070434</a></td>
    <td>Critical</td>
    <td>5.0, 5.1.1, 6.0, 6.0.1</td>
    <td>Oct 12, 2015</td>
 </tr>
</table>


<h3 id=elevation_of_privilege_vulnerability_in_qualcomm_performance_module>Elevation of Privilege Vulnerability in Qualcomm Performance Module</h3>


<p>An elevation of privilege vulnerability in the performance event manager
component for ARM processors from Qualcomm could enable a local malicious
application to execute arbitrary code within the kernel. This issue is rated as
a Critical severity due to the possibility of a local permanent device
compromise and the device would possibly need to be repaired by re-flashing the
operating system.</p>
<table>
 <tr>
    <th>CVE</th>
    <th>Bug</th>
    <th>Severity</th>
    <th>Updated versions</th>
    <th>Date reported</th>
 </tr>
 <tr>
    <td>CVE-2016-0805</td>
    <td>ANDROID-25773204*</td>
    <td>Critical</td>
    <td>4.4.4, 5.0, 5.1.1, 6.0, 6.0.1</td>
    <td>Nov 15, 2015</td>
 </tr>
</table>

<p>* The patch for this issue is not in AOSP. The update is contained in the
latest binary drivers for Nexus devices available from the <a href="https://developers.google.com/android/nexus/drivers">Google Developer site</a>.</p>

<h3 id=elevation_of_privilege_vulnerability_in_qualcomm_wifi_driver>Elevation of Privilege Vulnerability in Qualcomm Wi-Fi Driver</h3>


<p>There is a vulnerability in the Qualcomm Wi-Fi driver that could enable a local
malicious application to execute arbitrary code within the context of the
kernel. This issue is rated as a Critical severity due to the possibility of a
local permanent device compromise and the device would possibly need to be
repaired by re-flashing the operating system.</p>
<table>
 <tr>
    <th>CVE</th>
    <th>Bug</th>
    <th>Severity</th>
    <th>Updated versions</th>
    <th>Date reported</th>
 </tr>
 <tr>
    <td>CVE-2016-0806</td>
    <td>ANDROID-25344453*</td>
    <td>Critical</td>
    <td>4.4.4, 5.0, 5.1.1, 6.0, 6.0.1</td>
    <td>Nov 15, 2015</td>
 </tr>
</table>

<p>* The patch for this issue is not in AOSP. The update is contained in the
latest binary drivers for Nexus devices available from the <a href="https://developers.google.com/android/nexus/drivers">Google Developer site</a>.</p>

<h3 id=elevation_of_privilege_vulnerability_in_the_debuggerd>Elevation of Privilege Vulnerability in the Debuggerd </h3>


<p>An elevation of privilege vulnerability in the Debuggerd component could enable
a local malicious application to execute arbitrary code within the device root
context. This issue is rated as a Critical severity due to the possibility of a
local permanent device compromise and the device would possibly need to be
repaired by re-flashing the operating system.</p>
<table>
 <tr>
    <th>CVE</th>
    <th>Bug with AOSP link</th>
    <th>Severity</th>
    <th>Updated versions</th>
    <th>Date reported</th>
 </tr>
 <tr>
    <td>CVE-2016-0807</td>
    <td><a href="https://android.googlesource.com/platform%2Fsystem%2Fcore/+/d917514bd6b270df431ea4e781a865764d406120">ANDROID-25187394</a></td>
    <td>Critical</td>
    <td>6.0 and 6.0.1</td>
    <td>Google Internal</td>
 </tr>
</table>


<h3 id=denial_of_service_vulnerability_in_minikin>Denial of Service Vulnerability in Minikin</h3>


<p>A denial of service vulnerability in the Minikin library could allow a local
attacker to temporarily block access to an affected device. An attacker could
cause an untrusted font to be loaded and cause an overflow in the Minikin
component which leads to a crash. This is rated as a high severity because
Denial of Service leads to a continuous reboot loop.</p>
<table>
 <tr>
    <th>CVE</th>
    <th>Bug with AOSP link</th>
    <th>Severity</th>
    <th>Updated versions</th>
    <th>Date reported</th>
 </tr>
 <tr>
    <td>CVE-2016-0808</td>
    <td><a href="https://android.googlesource.com/platform/frameworks/minikin/+/ed4c8d79153baab7f26562afb8930652dfbf853b">ANDROID-25645298</a></td>
    <td>High</td>
    <td>5.0, 5.1.1, 6.0, 6.0.1</td>
    <td>Nov 3, 2015</td>
 </tr>
</table>


<h3 id=elevation_of_privilege_vulnerability_in_wi-fi>Elevation of Privilege Vulnerability in Wi-Fi</h3>


<p>An elevation of privilege vulnerability in the Wi-Fi component could enable a
local malicious application to execute arbitrary code within the System
context. A device is only vulnerable to this issue while in local proximity.
This issue is rated as High severity because it could be used to gain “<a href="http://developer.android.com/guide/topics/manifest/permission-element.html#plevel">normal</a>” capabilities remotely. Generally, these permissions are accessible only to
third-party applications installed locally.</p>
<table>
 <tr>
    <th>CVE</th>
    <th>Bug with AOSP link</th>
    <th>Severity</th>
    <th>Updated versions</th>
    <th>Date reported</th>
 </tr>
 <tr>
    <td>CVE-2016-0809</td>
    <td><a href="https://android.googlesource.com/platform/hardware/broadcom/wlan/+/2c5a4fac8bc8198f6a2635ede776f8de40a0c3e1%5E%21/#F0">ANDROID-25753768</a></td>
    <td>High</td>
    <td>6.0, 6.0.1</td>
    <td>Google Internal</td>
 </tr>
</table>


<h3 id=elevation_of_privilege_vulnerability_in_mediaserver>Elevation of Privilege Vulnerability in Mediaserver </h3>


<p>An elevation of privilege vulnerability in mediaserver could enable a local
malicious application to execute arbitrary code within the context of an
elevated system application. This issue is rated as High severity because it
could be used to gain elevated capabilities, such as <a href="http://developer.android.com/guide/topics/manifest/permission-element.html#plevel">Signature</a> or <a href="http://developer.android.com/guide/topics/manifest/permission-element.html#plevel">SignatureOrSystem</a> permissions privileges, which are not accessible to a third-party application.</p>
<table>
 <tr>
    <th>CVE</th>
    <th>Bug with AOSP link</th>
    <th>Severity</th>
    <th>Updated versions</th>
    <th>Date reported</th>
 </tr>
 <tr>
    <td>CVE-2016-0810</td>
    <td><a href="https://android.googlesource.com/platform%2Fframeworks%2Fav/+/19c47afbc402542720ddd280e1bbde3b2277b586">ANDROID-25781119</a></td>
    <td>High</td>
    <td>4.4.4, 5.0, 5.1.1, 6.0, 6.0.1</td>
    <td>Google Internal</td>
 </tr>
</table>


<h3 id=information_disclosure_vulnerability_in_libmediaplayerservice>Information Disclosure Vulnerability in libmediaplayerservice </h3>


<p>An information disclosure vulnerability in libmediaplayerservice could permit a
bypass of security measures in place to increase the difficulty of attackers
exploiting the platform. These issues are rated as High severity because they
could also be used to gain elevated capabilities, such as <a href="http://developer.android.com/guide/topics/manifest/permission-element.html#plevel">Signature</a> or <a href="http://developer.android.com/guide/topics/manifest/permission-element.html#plevel">SignatureOrSystem</a> permissions privileges, which are not accessible to third-party applications.</p>
<table>
 <tr>
    <th>CVE</th>
    <th>Bug with AOSP link</th>
    <th>Severity</th>
    <th>Updated versions</th>
    <th>Date reported</th>
 </tr>
 <tr>
    <td>CVE-2016-0811</td>
    <td><a href="https://android.googlesource.com/platform%2Fframeworks%2Fav/+/22f824feac43d5758f9a70b77f2aca840ba62c3b">ANDROID-25800375</a></td>
    <td>High</td>
    <td>6.0, 6.0.1</td>
    <td>Nov 16, 2015</td>
 </tr>
</table>


<h3 id=elevation_of_privilege_vulnerability_in_setup_wizard>Elevation of Privilege Vulnerability in Setup Wizard</h3>


<p>A vulnerability in the Setup Wizard could allow a malicious attacker to bypass
the Factory Reset Protection and gain access to the device. This is rated as a
Moderate severity because it potentially allows someone with physical access to
a device to bypass the Factory Reset Protection, which enables an attacker to
successfully reset a device, erasing all data.</p>
<table>
 <tr>
    <th>CVE</th>
    <th>Bugs with AOSP links</th>
    <th>Severity</th>
    <th>Updated versions</th>
    <th>Date reported</th>
 </tr>
 <tr>
    <td>CVE-2016-0812</td>
    <td><a href="https://android.googlesource.com/platform%2Fframeworks%2Fbase/+/84669ca8de55d38073a0dcb01074233b0a417541">ANDROID-25229538</a></td>
    <td>Moderate</td>
    <td>5.1.1, 6.0</td>
    <td>Google Internal</td>
 </tr>
 <tr>
    <td>CVE-2016-0813</td>
    <td><a href="https://android.googlesource.com/platform%2Fframeworks%2Fbase/+/16a76dadcc23a13223e9c2216dad1fe5cad7d6e1">ANDROID-25476219</a></td>
    <td>Moderate</td>
    <td>5.1.1, 6.0, 6.0.1</td>
    <td>Google Internal</td>
 </tr>
</table>

<h3 id=common_questions_and_answers>Common Questions and Answers</strong></h3>

<p>This section reviews answers to common questions that may occur after reading
this bulletin.</p>

<p><strong>1. How do I determine if my device is updated to address these issues?</strong></p>

<p>Builds LMY49G or later and Android 6.0 with Security Patch Level of February 1,
2016 or later address these issues. Refer to the <a href="https://support.google.com/nexus/answer/4457705">Nexus documentation</a> for instructions on how to check the security patch level. Device
manufacturers that include these updates should set the patch string level to:
[ro.build.version.security_patch]:[2016-02-01]</p>

<h2 id=revisions>Revisions</h2>


<ul>
  <li> February 01, 2016: Bulletin published.
  <li> February 02, 2016:  Bulletin revised to include AOSP links.