CVE-2020-15999

Open Source Vulnerabilities ASB-A-171232105

In Load_SBit_Png of pngshim.c, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is needed for exploitation.

Cybersecurity and Infrastructure Security Agency Known Exploited Vulnerabilities CVE-2020-15999

Google Chrome uses FreeType, an open-source software library to render fonts, which contains a heap buffer overflow vulnerability in the function Load_SBit_Png when processing PNG images embedded into fonts. This vulnerability is part of an exploit chain with CVE-2020-17087 on Windows and CVE-2020-16010 on Android.

Open Source Vulnerabilities GHSA-pv36-h7jh-qm62

### 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 - https://www.secpod.com/blog/chrome-zero-day-under-active-exploitation-patch-now/ - https://www.zdnet.com/article/google-releases-chrome-security-update-to-patch-actively-exploited-zero-day/ - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15999 - https://magpcss.org/ceforum/viewtopic.php?f=10&t=17942 To review the `CEF/Chromium` patch see https://bitbucket.org/chromiumembedded/cef/commits/cd6cbe008b127990036945fb75e7c2c1594ab10d

Open Source Vulnerabilities CVE-2020-15999

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.