CVE-2018-0777 Memory corruption in Microsoft Edge

What is CVE-2018-0777?

CVE-2018-0777 is a high-severity memory corruption vulnerability in Microsoft Chakracore, published on 4 Jan 2018. 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

Microsoft Edge in Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows an attacker to execute arbitrary code in the context of the current user, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0758, CVE-2018-0762, CVE-2018-0768, CVE-2018-0769, CVE-2018-0770, CVE-2018-0772, CVE-2018-0773, CVE-2018-0774, CVE-2018-0775, CVE-2018-0776, CVE-2018-0778, and CVE-2018-0781.

Weakness: CWE-787

Which versions are affected by CVE-2018-0777?

It affects 2 products.

Products include Microsoft Chakracore, Microsoft Edge.

How do I fix CVE-2018-0777?

No fix has been published for CVE-2018-0777 yet. Limit exposure of the affected software until one is available.

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

Is CVE-2018-0777 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-0777 exists.

Public exploit code: 1 Exploit-DB entry.

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-xxqm-xpq7-prvx.