CVE-2018-8355 ChakraCore RCE Vulnerability
Remote attackers can execute arbitrary code by exploiting a memory corruption flaw in the Microsoft scripting engine.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-8355?
CVE-2018-8355 is a high-severity memory corruption vulnerability in Microsoft Chakracore, published on 15 Aug 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
A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore, Internet Explorer 11, Microsoft Edge. This CVE ID is unique from CVE-2018-8353, CVE-2018-8359, CVE-2018-8371, CVE-2018-8372, CVE-2018-8373, CVE-2018-8385, CVE-2018-8389, CVE-2018-8390.
Weakness: CWE-787
Which versions are affected by CVE-2018-8355?
2 open source packages ship an affected version, including Microsoft.ChakraCore. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
Microsoft.ChakraCore NuGet | All versions | 1.10.2 |
Microsoft.ChakraCore NuGet | All versions | 1.10.2 |
Products include Microsoft Chakracore, Microsoft Edge, Microsoft Internet Explorer.
How do I fix CVE-2018-8355?
Upgrade Microsoft.ChakraCore to 1.10.2 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2018-8355 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-8355 exists.
Public exploit code: 2 Exploit-DB entries.
Other vulnerabilities in Microsoft Chakracore
Sources
Also known as GHSA-h8jq-5737-hpcf.