Heap buffer overflow in Freetype in Google Chrome prior to 86.0.4240.111 allowed a remote attacker to potentially exploit heap corruption vi
Affects Google Chrome before 86.0.4240.111 and CefSharp packages before 85.3.130, including CefSharp.Wpf and CefSharp.WinForms. CVSS scores it 9.6 Critical. Fixed in those releases.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 86.0.4240.111, 85.3.130
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Google Chrome's browser engine, which uses the FreeType font rendering library, is affected. A remote attacker could potentially exploit this flaw by tricking a user into opening a specially crafted web page, which could lead to heap memory corruption.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Heap buffer overflow in Freetype in Google Chrome prior to 86.0.4240.111 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Google Chrome
From unspecified · fixed in 86.0.4240.111
- CefSharp.CommonNuGet
fixed in 85.3.130
- CefSharp.WpfNuGet
fixed in 85.3.130
- CefSharp.WinFormsNuGet
fixed in 85.3.130
- CefSharp.Wpf.HwndHostNuGet
fixed in 85.3.130
References 10
crbug.com
chromereleases.googleblog.com
lists.opensuse.org
lists.fedoraproject.org
security.gentoo.org
seclists.org
debian.org
googleprojectzero.blogspot.com
Questions about CVE-2020-15999
What does this mean?
The bug is a heap-based buffer overflow in FreeType's PNG embedded bitmap loading (Load_SBit_Png). An integer truncation lets data be written past the end of a heap buffer, which can corrupt heap memory.Source: lists.fedoraproject.org
Am I affected, and how do I check?
Google Chrome versions before 86.0.4240.111 and CefSharp.Common, CefSharp.Wpf, CefSharp.WinForms and CefSharp.Wpf.HwndHost versions before 85.3.130 are listed as affected. To check a Chrome install, open chrome://version; for CefSharp, check the package version your project references.Source: lists.fedoraproject.org
What should I do about it?
Update Google Chrome to 86.0.4240.111 or later and CefSharp packages to 85.3.130 or later. On Fedora 31, update freetype to freetype-2.10.0-4.fc31 or later.Source: lists.fedoraproject.org
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2021-11-03, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data