Known exploited vulnerability
CVE-2020-15999
The short answer
CVE-2020-15999 affects Google Chrome and is rated critical (CVSS 9.6). CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-03: attackers are using it, so patch it first. Fixed versions are published for CefSharp.Common (85.3.130) and CefSharp.Wpf (85.3.130).
What it is
Severity
9.6 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Nov 3, 2021
Federal due date Nov 17, 2021
EPSS, next 30 days
64%
Higher than 99% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected packages and fixed versions
| Package | Ecosystem | Fixed in | Advisory |
|---|---|---|---|
| CefSharp.Common | NuGet | 85.3.130 | GHSA-pv36-h7jh-qm62 |
| CefSharp.Wpf | NuGet | 85.3.130 | GHSA-pv36-h7jh-qm62 |
| CefSharp.WinForms | NuGet | 85.3.130 | GHSA-pv36-h7jh-qm62 |
| CefSharp.Wpf.HwndHost | NuGet | 85.3.130 | GHSA-pv36-h7jh-qm62 |
Is it in your code? Drop your lockfile into the free vulnerability check, or let vulnerability watch check your repository every day and open the upgrade as a pull request.
Affected products
Chrome. NVD's record lists the exact affected versions.
References
- chromereleases.googleblog.com/2020/10/stable-channel-update-for-desktop_20.html Third Party Advisory
- crbug.com/1139963 ExploitIssue TrackingThird Party Advisory
- googleprojectzero.blogspot.com/p/rca-cve-2020-15999.html ExploitThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J3QVIGAAJ4D62YEJAJJWMCCBCOQ6TVL7/ Release Notes
- security.gentoo.org/glsa/202011-12 Third Party Advisory
- security.gentoo.org/glsa/202012-04 Third Party Advisory
- security.gentoo.org/glsa/202401-19 Third Party Advisory
- www.debian.org/security/2021/dsa-4824 Mailing ListThird Party Advisory
- chromereleases.googleblog.com/2020/10/stable-channel-update-for-desktop_20.html Third Party Advisory
- crbug.com/1139963 ExploitIssue TrackingThird Party Advisory
- googleprojectzero.blogspot.com/p/rca-cve-2020-15999.html ExploitThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J3QVIGAAJ4D62YEJAJJWMCCBCOQ6TVL7/ Release Notes
Questions
Is CVE-2020-15999 being exploited?
Yes. CISA added CVE-2020-15999 to its Known Exploited Vulnerabilities catalog on 2021-11-03, with a federal remediation due date of 2021-11-17.
How do I fix CVE-2020-15999?
Upgrade to a fixed version: CefSharp.Common (NuGet) 85.3.130; CefSharp.Wpf (NuGet) 85.3.130; CefSharp.WinForms (NuGet) 85.3.130; CefSharp.Wpf.HwndHost (NuGet) 85.3.130. CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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