Stable Channel Update for Desktop

The Chrome team is delighted to announce the promotion of Chrome 56 to the stable channel - 56.0.2924.76for Windows, Mac and Linux. This will roll out over the coming days/weeks.

Chrome 56.0.2924.76 contains a number of fixes and improvements – a list of changes is available in the log. Watch out for upcoming Chrome and Chromium blog posts about new features and big efforts delivered in 56.

Security Fixes and Rewards

Note: Access to bug details and links may be kept restricted until a majority of users are updated with a fix. We will also retain restrictions if the bug exists in a third party library that other projects similarly depend on, but haven't yet fixed.

---

This update includes 51 security fixes. Below, we highlight fixes that were contributed by external researchers. Please see the Chrome Security Page for more information.

---

[$8837][671102] High CVE-2017-5007: Universal XSS in Blink. Credit to Mariusz Mlynski

[$8000][673170] High CVE-2017-5006: Universal XSS in Blink. Credit to Mariusz Mlynski

[$8000][668552] High CVE-2017-5008: Universal XSS in Blink. Credit to Mariusz Mlynski

[$7500][663476] High CVE-2017-5010: Universal XSS in Blink. Credit to Mariusz Mlynski

[$3000][662859] High CVE-2017-5011: Unauthorised file access in Devtools. Credit to Khalil Zhani

[$3000][667504] High CVE-2017-5009: Out of bounds memory access in WebRTC. Credit to Sean Stanek and Chip Bradford

[$5500][681843] High CVE-2017-5012: Heap overflow in V8. Credit to Gergely Nagy (Tresorit)
[$3000][653555] High CVE-2017-5028: Insufficient data validation in V8.

[$2000][677716] Medium CVE-2017-5013: Address spoofing in Omnibox. Credit to Haosheng Wang (@gnehsoah)

[$2000][675332] Medium CVE-2017-5014: Heap overflow in Skia. Credit to sweetchip

[$2000][673971] Medium CVE-2017-5015: Address spoofing in Omnibox. Credit to Armin Razmdjou

[$2000][666714] Medium CVE-2017-5019: Use after free in Renderer. Credit to Wadih Matar

[$1000][673163] Medium CVE-2017-5016: UI spoofing in Blink. Credit to Haosheng Wang (@gnehsoah)

[$500][676975] Medium CVE-2017-5017: Uninitialised memory access in webm video. Credit to Dan Berman

[$500][668665] Medium CVE-2017-5018: Universal XSS in chrome://apps. Credit to Rob Wu

[$TBD][668653] Medium CVE-2017-5020: Universal XSS in chrome://downloads. Credit to Rob Wu

[$N/A][663726] Low CVE-2017-5021: Use after free in Extensions. Credit to Rob Wu

[$N/A][663620] Low CVE-2017-5022: Bypass of Content Security Policy in Blink. Credit to evi1m0#ly.com

[$N/A][651443] Low CVE-2017-5023: Type confusion in metrics. Credit to the UK’s National Cyber Security Centre (NCSC)

[$N/A][643951] Low CVE-2017-5024: Heap overflow in FFmpeg. Credit to Paul Mehta

[$N/A][643950] Low CVE-2017-5025: Heap overflow in FFmpeg. Credit to Paul Mehta

[$500][634108] Low CVE-2017-5026: UI spoofing. Credit to Ronni Skansing

---

[$N/A][661126] Low CVE-2017-5027: Bypass of Content Security Policy in Blink. Credit to 李普君 of 无声信息技术PKAV Team

We would also like to thank all security researchers that worked with us during the development cycle to prevent security bugs from ever reaching the stable channel.

---

As usual, our ongoing internal security work was responsible for a wide range of fixes:

• [685349] Various fixes from internal audits, fuzzing and other initiatives

Many of our security bugs are detected using AddressSanitizer, MemorySanitizer, Control Flow Integrity, or libFuzzer.

Interested in switching release channels? Find out how. If you find a new issue, please let us know by filing a bug. The community help forum is also a great place to reach out for help or learn about common issues.

Richard Bustamante

Google Chrome