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Heap buffer overflow in CefSharp

Moderate severity GitHub Reviewed Published Oct 25, 2020 in cefsharp/CefSharp • Updated Feb 3, 2025

Package

nuget CefSharp.Common (NuGet)

Affected versions

< 85.3.130

Patched versions

85.3.130
nuget CefSharp.WinForms (NuGet)
< 85.3.130
85.3.130
nuget CefSharp.Wpf (NuGet)
< 85.3.130
85.3.130
nuget CefSharp.Wpf.HwndHost (NuGet)
< 85.3.130
85.3.130

Description

Impact

A memory corruption bug(Heap overflow) in the FreeType font rendering library.

This can be exploited by attackers to execute arbitrary code by using specially crafted fonts with embedded PNG images .

As per https://www.secpod.com/blog/chrome-zero-day-under-active-exploitation-patch-now/

Google is aware of reports that an exploit for CVE-2020-15999 exists in the wild.

Patches

Upgrade to 85.3.130 or higher

References

To review the CEF/Chromium patch see https://bitbucket.org/chromiumembedded/cef/commits/cd6cbe008b127990036945fb75e7c2c1594ab10d

References

@amaitland amaitland published to cefsharp/CefSharp Oct 25, 2020
Reviewed Oct 27, 2020
Published to the GitHub Advisory Database Oct 27, 2020
Published by the National Vulnerability Database Nov 3, 2020
Last updated Feb 3, 2025

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(94th percentile)

Weaknesses

CVE ID

CVE-2020-15999

GHSA ID

GHSA-pv36-h7jh-qm62

Source code

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