CVE-2020-16009: Inappropriate implementation in V8

CVE-2020-16009 · Severity: critical · CVSS 3.1 · Exploited in the wild · Published 2020-12-02

A type confusion vulnerability in the Google Chromium V8 engine allows a remote attacker to potentially execute arbitrary code or cause heap corruption via a crafted HTML page. The flaw was exploited in the wild prior to being patched and affects multiple Chromium-based browsers.

Technologies: Google Chromium V8, CefSharp.Common (NuGet), CefSharp.WinForms (NuGet), CefSharp.Wpf (NuGet), CefSharp.Wpf.HwndHost (NuGet). Vendors: Google, NuGet.

Quick answers

Is CVE-2020-16009 exploited in the wild?
Yes. CVE-2020-16009 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2020-16009?
Critical severity, with a CVSS score of 3.1, published 2 December 2020.
Which products and versions are affected?
CefSharp.Common (NuGet) ECOSYSTEM:introduced=0,fixed=86.0.241; CefSharp.WinForms (NuGet) ECOSYSTEM:introduced=0,fixed=86.0.241; CefSharp.Wpf (NuGet) ECOSYSTEM:introduced=0,fixed=86.0.241; CefSharp.Wpf.HwndHost (NuGet) ECOSYSTEM:introduced=0,fixed=86.0.241.
Is there a fix for CVE-2020-16009?
Yes. CefSharp.Common (NuGet): upgrade to 86.0.241 or later; CefSharp.WinForms (NuGet): upgrade to 86.0.241 or later; CefSharp.Wpf (NuGet): upgrade to 86.0.241 or later; CefSharp.Wpf.HwndHost (NuGet): upgrade to 86.0.241 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2020-16009 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2020-16009?
Check whether you run Google Chromium V8, CefSharp.Common (NuGet), CefSharp.WinForms (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • CefSharp.Common (NuGet): upgrade to 86.0.241 or later
    dotnet add package CefSharp.Common --version 86.0.241
  • CefSharp.WinForms (NuGet): upgrade to 86.0.241 or later
    dotnet add package CefSharp.WinForms --version 86.0.241
  • CefSharp.Wpf (NuGet): upgrade to 86.0.241 or later
    dotnet add package CefSharp.Wpf --version 86.0.241
  • CefSharp.Wpf.HwndHost (NuGet): upgrade to 86.0.241 or later
    dotnet add package CefSharp.Wpf.HwndHost --version 86.0.241

Affected products

  • Google Chrome prior to 86.0.4240.183
  • Google V8 Engine
  • Microsoft Edge
  • Opera Opera

Identifiers

  • CVE-2020-16009
  • GHSA-m7mf-48hp-5qmr

Timeline

  • 2020-11-02: patched: Stable channel update for desktop released (86.0.4240.183)
  • 2021-11-03: disclosed: Published in NVD and added to CISA KEV catalog
  • 2021-11-03: kev added

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