CVE-2019-1106 Out-of-bounds write

What is CVE-2019-1106?

CVE-2019-1106 is a high-severity memory corruption vulnerability in Microsoft Chakracore, published on 29 Jul 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka 'Chakra Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-1062, CVE-2019-1092, CVE-2019-1103, CVE-2019-1107.

Weakness: CWE-787

Which versions are affected by CVE-2019-1106?

2 open source packages ship an affected version, including Microsoft.ChakraCore. It affects 2 products.

Products include Microsoft Chakracore, Microsoft Edge.

How do I fix CVE-2019-1106?

Upgrade Microsoft.ChakraCore to 1.11.11 or later.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2019-1106 being exploited?

There is no known exploitation of CVE-2019-1106 in the wild and no public exploit code.

Other vulnerabilities in Microsoft Chakracore

• CVE-2018-8298 ChakraCore Scripting Engine Type Confusion Exploited High 7.5
• CVE-2020-0878 Microsoft Edge and Internet Explorer Memory Corruption Exploited Medium 4.2
• CVE-2018-8500 ChakraCore RCE Vulnerability Critical 9.8
• CVE-2017-11767 ChakraCore vulnerable to privilege escalation Critical 9.8
• CVE-2017-8658 ChakraCore RCE Vulnerability Critical 9.8

All Microsoft Chakracore vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-mg98-x2cm-4cpf.