CVE-2020-16009: CefSharp.Common Inappropriate Implementation Vulnerability

Q: What is CVE-2020-16009?

CVE-2020-16009 is a security vulnerability in CefSharp.Common involving Inappropriate implementation in V8 under CWE-787: Out-of-bounds Write.

Q: Which CefSharp.Common versions are affected?

Affected versions include releases prior to 86.0.241 across affected packages: CefSharp.Common, CefSharp.Wpf, CefSharp.WinForms, CefSharp.Wpf.HwndHost.

Q: What version fixes CVE-2020-16009?

Upgrading to 86.0.241 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is CefSharp.Common affected?

Yes, CefSharp.Common is affected in releases prior to 86.0.241. Upgrade your dependency to 86.0.241 or later.

Q: Is CefSharp.Wpf affected?

Yes, CefSharp.Wpf is affected in releases prior to 86.0.241. Upgrade your dependency to 86.0.241 or later.

Q: What is the CVSS score of CVE-2020-16009?

CVE-2020-16009 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Q: What CWE is associated with CVE-2020-16009?

CVE-2020-16009 is classified under CWE-787: Out-of-bounds Write (The product writes data past the end, or before the beginning, of the intended buffer.).

Q: How can I check NuGet dependencies for CVE-2020-16009?

Run the dependency tree command: 'inspect dependencies for CefSharp.Common'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

HIGH

Advisory Identifier: GHSA-m7mf-48hp-5qmr

CVSS 8.8

CWE-787

Published 2020-12-02

Advisory Summary

CVE-2020-16009 is a HIGH (CVSS 8.8) inappropriate implementation vulnerability (CWE-787: Out-of-bounds Write) affecting CefSharp.Common libraries in the NuGet ecosystem. The issue involves inappropriate implementation in v8. Remediation is available by upgrading affected packages to version 86.0.241.

CVE-2020-16009 at a Glance

CVE Identifier CVE-2020-16009

GHSA Identifier GHSA-m7mf-48hp-5qmr

Severity HIGH

CVSS v3.1 Base Score 8.8

CWE Classification CWE-787: Out-of-bounds Write

Affected Product CefSharp.Common

Package Ecosystem NuGet

Published Date 2020-12-02

Last Updated 2023-06-06

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction Required (UI:R)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability High (A:H)

How to Fix CVE-2020-16009

To remediate this vulnerability, upgrade all affected CefSharp.Common dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

CefSharp.Common fixed: 86.0.241

Upgrade CefSharp.Common to 86.0.241

CefSharp.Wpf fixed: 86.0.241

Upgrade CefSharp.Wpf to 86.0.241

CefSharp.WinForms fixed: 86.0.241

Upgrade CefSharp.WinForms to 86.0.241

CefSharp.Wpf.HwndHost fixed: 86.0.241

Upgrade CefSharp.Wpf.HwndHost to 86.0.241

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

inspect dependencies for CefSharp.Common

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-16009, inspect your project dependencies for CefSharp.Common:

inspect dependencies for CefSharp.Common

Analyze the terminal output to locate any version of CefSharp.Common in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 86.0.241), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-787: Out-of-bounds Write, where the product writes data past the end, or before the beginning, of the intended buffer. In CefSharp.Common, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

CVE-2020-16009: Inappropriate implementation in V8 - https://chromereleases.googleblog.com/2020/11/stable-channel-update-for-desktop.html - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16009 Google is aware of reports that exploits for CVE-2020-16009 exist in the wild. Allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. There is currently little to no public information on the issue other than it has been flagged as `High` severity.

CVE-2020-16009 Affected CefSharp.Common Versions

4 component(s)

Fixed Versions:

86.0.241

Product / Package	Ecosystem	Affected Versions	Fixed Version
CefSharp.Common nuget/CefSharp.Common	NuGet	< 86.0.241	86.0.241
CefSharp.Wpf nuget/CefSharp.Wpf	NuGet	< 86.0.241	86.0.241
CefSharp.WinForms nuget/CefSharp.WinForms	NuGet	< 86.0.241	86.0.241
CefSharp.Wpf.HwndHost nuget/CefSharp.Wpf.HwndHost	NuGet	< 86.0.241	86.0.241

References

GitHub Advisory / Wiki ADVISORY

https://github.com/cefsharp/CefSharp/security/advisories/GHSA-m7mf-48hp-5qmr

NVD — CVE-2020-16009 NVD

https://nvd.nist.gov/vuln/detail/CVE-2020-16009

chromereleases.googleblog.com/2020/11/stable-chan... WEB

https://chromereleases.googleblog.com/2020/11/stable-channel-update-for-desktop.html

crbug.com/1143772 WEB

https://crbug.com/1143772

CefSharp.Common Source Repository REPOSITORY

https://github.com/cefsharp/CefSharp

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S4XYJ7B6OXHZNYSA5J3DBUOFEC6WCAGW

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SC3U3H6AISVZB5PLZLLNF4HMQ4UFFL7M

CefSharp.Common Security Information SECURITY

https://security.gentoo.org/glsa/202011-12

CefSharp.Common Security Information SECURITY

https://www.debian.org/security/2021/dsa-4824

CefSharp.Common Security Information SECURITY

http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00016.html

CefSharp.Common Security Information SECURITY

http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00017.html

CefSharp.Common Security Information SECURITY

http://packetstormsecurity.com/files/159974/Chrome-V8-Turbofan-Type-Confusion.html

Frequently Asked Questions

What is CVE-2020-16009?

CVE-2020-16009 is a security vulnerability in CefSharp.Common involving Inappropriate implementation in V8 under CWE-787: Out-of-bounds Write.

Which CefSharp.Common versions are affected?

Affected versions include releases prior to 86.0.241 across affected packages: CefSharp.Common, CefSharp.Wpf, CefSharp.WinForms, CefSharp.Wpf.HwndHost.

What version fixes CVE-2020-16009?

Upgrading to 86.0.241 (or the latest patched release for your respective branch) resolves the vulnerability.

Is CefSharp.Common affected?

Yes, CefSharp.Common is affected in releases prior to 86.0.241. Upgrade your dependency to 86.0.241 or later.

Is CefSharp.Wpf affected?

Yes, CefSharp.Wpf is affected in releases prior to 86.0.241. Upgrade your dependency to 86.0.241 or later.

What is the CVSS score of CVE-2020-16009?

CVE-2020-16009 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

What CWE is associated with CVE-2020-16009?

CVE-2020-16009 is classified under CWE-787: Out-of-bounds Write (The product writes data past the end, or before the beginning, of the intended buffer.).

How can I check NuGet dependencies for CVE-2020-16009?

Run the dependency tree command: 'inspect dependencies for CefSharp.Common'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

Machine-readable OSV JSON OSV v1.5 Schema

Normalized schema output

View Raw JSON

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-m7mf-48hp-5qmr",
  "modified" : "2023-06-06T18:43:22Z",
  "published" : "2020-12-02T18:28:47Z",
  "aliases" : [ "CVE-2020-16009" ],
  "summary" : "Inappropriate implementation in V8",
  "details" : "CVE-2020-16009: Inappropriate implementation in V8\n\n- https://chromereleases.googleblog.com/2020/11/stable-channel-update-for-desktop.html\n- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16009\n\nGoogle is aware of reports that exploits for CVE-2020-16009 exist in the wild.\n\nAllowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.\n\nThere is currently little to no public information on the issue other than it has been flagged as `High` severity.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CefSharp.Common"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "86.0.241"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CefSharp.Wpf"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
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      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CefSharp.WinForms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "86.0.241"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CefSharp.Wpf.HwndHost"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "86.0.241"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/cefsharp/CefSharp/security/advisories/GHSA-m7mf-48hp-5qmr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-16009"
  }, {
    "type" : "WEB",
    "url" : "https://chromereleases.googleblog.com/2020/11/stable-channel-update-for-desktop.html"
  }, {
    "type" : "WEB",
    "url" : "https://crbug.com/1143772"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/cefsharp/CefSharp"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S4XYJ7B6OXHZNYSA5J3DBUOFEC6WCAGW"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SC3U3H6AISVZB5PLZLLNF4HMQ4UFFL7M"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/202011-12"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2021/dsa-4824"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00016.html"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00017.html"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/159974/Chrome-V8-Turbofan-Type-Confusion.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-787" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-12-02T18:27:42Z",
    "nvd_published_at" : "2020-11-03T03:15:00Z"
  }
}

CVSS V3

8.8 HIGH

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction Required (UI:R)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability High (A:H)

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Advisory Metadata

Source ID: GHSA-m7mf-48hp-5qmr
Schema Version: 1.4.0
Published: 2020-12-02 18:28
Last Modified: 2023-06-06 18:43
Database Record File: advisories/github-reviewed/2020/12/GHSA-m7mf-48hp-5qmr/GHSA-m7mf-48hp-5qmr.json