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The Wayback Machine - https://web.archive.org/web/20220318003415/https://security.googleblog.com/2018/03/
Security Blog
The latest news and insights from Google on security and safety on the Internet
Android Security 2017 Year in Review
March 15, 2018
Posted by Dave Kleidermacher, Vice President of Security for Android, Play, ChromeOS
Our team’s goal is simple: secure more than two billion Android devices. It’s our entire focus, and we’re constantly working to improve our protections to keep users safe.
Today, we’re releasing our fourth annual Android Security Year in Review. We compile these reports to help educate the public about the many different layers of Android security, and also to hold ourselves accountable so that anyone can track our security work over time.
We saw really positive momentum last year and this post includes some, but not nearly all, of the major moments from 2017. To dive into all the details, you can read the full report at:
g.co/AndroidSecurityReport2017
Google Play Protect
In May, we
announced
Google Play Protect, a new home for the suite of Android security services on nearly two billion devices. While many of Play Protect’s features had been securing Android devices for years, we wanted to make these more visible to help assure people that our security protections are constantly working to keep them safe.
Play Protect’s core objective is to shield users from Potentially Harmful Apps, or PHAs. Every day, it automatically reviews more than 50 billion apps, other potential sources of PHAs, and devices themselves and takes action when it finds any.
Play Protect uses a variety of different tactics to keep users and their data safe, but the impact of machine learning is already quite significant: 60.3% of all Potentially Harmful Apps were detected via machine learning, and we expect this to increase in the future.
Protecting users' devices
Play Protect automatically checks Android devices for PHAs at least once every day, and users can conduct an additional review at any time for some extra peace of mind. These automatic reviews enabled us to remove nearly 39 million PHAs last year.
We also update Play Protect to respond to trends that we detect across the ecosystem. For instance, we recognized that nearly 35% of new PHA installations were occurring when a device was offline or had lost network connectivity. As a result, in October 2017, we enabled offline scanning in Play Protect, and have since prevented 10 million more PHA installs.
Preventing PHA downloads
Devices that downloaded apps exclusively from Google Play were nine times less likely to get a PHA than devices that downloaded apps from other sources. And these security protections continue to improve, partially because of Play Protect’s increased visibility into newly submitted apps to Play. It reviewed 65% more Play apps compared to 2016.
Play Protect also doesn’t just secure Google Play—it helps protect the broader Android ecosystem as well. Thanks in large part to Play Protect, the installation rates of PHAs from outside of Google Play dropped by more than 60%.
Security updates
While Google Play Protect is a great shield against harmful PHAs, we also partner with device manufacturers to make sure that the version of Android running on users' devices is up-to-date and secure.
Throughout the year, we worked to improve the process for releasing security updates, and 30% more devices received security patches than in 2016. Furthermore, no critical security vulnerabilities affecting the Android platform were publicly disclosed without an update or mitigation available for Android devices. This was possible due to the
Android Security Rewards Program
, enhanced collaboration with the
security researcher community
, coordination with industry partners, and built-in security features of the Android platform.
New security features in Android Oreo
We introduced a slew of new security features in Android Oreo:
making it safer to get apps
, dropping
insecure network protocols
, providing more
user control over identifiers
,
hardening the kernel
, and more.
We highlighted many of these over the course of the year, but some may have flown under the radar. For example, we updated the overlay API so that apps can no longer block the entire screen and prevent you from dismissing them, a common tactic employed by ransomware.
Openness makes Android security stronger
We’ve long said it, but it remains truer than ever: Android’s openness helps strengthen our security protections. For years, the Android ecosystem has benefitted from researchers’ findings, and 2017 was no different.
Security reward programs
We continued to see great momentum with our Android Security Rewards program: we paid researchers $1.28 million dollars, pushing our total rewards past $2 million dollars since the program began. We also
increased our top-line payouts
for exploits that compromise TrustZone or Verified Boot from $50,000 to $200,000, and remote kernel exploits from $30,000 to $150,000.
In parallel, we introduced
Google Play Security Rewards Program
and offered a bonus bounty to developers that discover and disclose select critical vulnerabilities in apps hosted on Play to their developers.
External security competitions
Our teams also participated in external vulnerability discovery and disclosure competitions, such as
Mobile Pwn2Own
. At the 2017 Mobile Pwn2Own competition, no exploits successfully compromised the Google Pixel. And of the exploits demonstrated against devices running Android, none could be reproduced on a device running unmodified Android source code from the
Android Open Source Project
(AOSP).
We’re pleased to see the positive momentum behind Android security, and we’ll continue our work to improve our protections this year, and beyond. We will never stop our work to ensure the security of Android users.
Distrust of the Symantec PKI: Immediate action needed by site operators
March 7, 2018
Posted by Devon O’Brien, Ryan Sleevi, Emily Stark, Chrome security team
Update October 17, 2018
:
Chrome 70
has now been released
to the Stable Channel, and users will start to see full screen interstitials on sites which still use certificates issues by the Legacy Symantec PKI. Initially this change will reach a small percentage of users, and then slowly scale up to 100% over the next several weeks.
Site Operators receiving problem reports from users are strongly encouraged to take corrective action by replacing their website certificates as soon as possible. Instructions on how to determine whether your site is affected as well as what corrective action is needed can be found below.
We
previously announced
plans to deprecate Chrome’s trust in the Symantec certificate authority (including Symantec-owned brands like Thawte, VeriSign, Equifax, GeoTrust, and RapidSSL). This post outlines how site operators can determine if they’re affected by this deprecation, and if so, what needs to be done and by when. Failure to replace these certificates will result in site breakage in upcoming versions of major browsers, including Chrome.
Chrome 66
If your site is using a SSL/TLS certificate from Symantec that was issued before June 1, 2016, it will stop functioning in Chrome 66, which could already be impacting your users.
If you are uncertain about whether your site is using such a certificate, you can preview these changes in
Chrome Canary
to see if your site is affected. If connecting to your site displays a certificate error or a warning in DevTools as shown below, you’ll need to replace your certificate. You can get a new certificate from any
trusted CA
, including Digicert, which recently acquired Symantec’s CA business.
An example of a certificate error that Chrome 66 users might see if you are using a Legacy Symantec SSL/TLS certificate that was issued before June 1, 2016.
The DevTools message you will see if you need to replace your certificate before Chrome 66.
Chrome 66 has already been released to the Canary and Dev channels, meaning affected sites are already impacting users of these Chrome channels. If affected sites do not replace their certificates by
March 15, 2018
, Chrome Beta users will begin experiencing the failures as well. You are strongly encouraged to replace your certificate as soon as possible if your site is currently showing an error in Chrome Canary.
Chrome 70
Starting in Chrome 70, all remaining Symantec SSL/TLS certificates will stop working, resulting in a certificate error like the one shown above. To check if your certificate will be affected, visit your site in Chrome today and open up DevTools. You’ll see a message in the console telling you if you need to replace your certificate.
The DevTools message you will see if you need to replace your certificate before Chrome 70.
If you see this message in DevTools, you’ll want to replace your certificate as soon as possible. If the certificates are not replaced, users will begin seeing certificate errors on your site as early as
July 20, 2018
. The first Chrome 70 Beta release will be around September 13, 2018.
Expected Chrome Release Timeline
The table below shows the First Canary, First Beta and Stable Release for Chrome 66 and 70. The first impact from a given release will coincide with the First Canary, reaching a steadily widening audience as the release hits Beta and then ultimately Stable. Site operators are strongly encouraged to make the necessary changes to their sites before the First Canary release for Chrome 66 and 70, and no later than the corresponding Beta release dates.
Release
First Canary
First Beta
Stable Release
Chrome 66
January 20, 2018
~ March 15, 2018
~ April 17, 2018
Chrome 70
~ July 20, 2018
~ September 13, 2018
~ October 16, 2018
For information about the release timeline for a particular version of Chrome, you can also refer to the
Chromium Development Calendar
which will be updated should release schedules change.
In order to address the needs of certain enterprise users, Chrome will also implement an Enterprise Policy that allows disabling the Legacy Symantec PKI distrust starting with Chrome 66. As of January 1, 2019, this policy will no longer be available and the Legacy Symantec PKI will be distrusted for all users. See this
Enterprise Help Center article
for more information.
Special Mention: Chrome 65
As noted in the
previous announcement
, SSL/TLS certificates from the Legacy Symantec PKI issued after December 1, 2017 are no longer trusted. This should not affect most site operators, as it requires entering in to special agreement with DigiCert to obtain such certificates. Accessing a site serving such a certificate will fail and the request will be blocked as of Chrome 65. To avoid such errors, ensure that such certificates are only served to legacy devices and not to browsers such as Chrome.
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