CVE-2017-11870 Chakra Core vulnerable to privilege escalation when writing to JavaScript null scope objects
Attacker can execute arbitrary code with current user rights via memory corruption in the ChakraCore 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-2017-11870?
CVE-2017-11870 is a high-severity memory corruption vulnerability in Microsoft Chakracore, published on 15 Nov 2017. 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
ChakraCore and Microsoft Edge in Windows 10 1703, 1709, and Windows Server, version 1709 allows an attacker to gain the same user rights as 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-2017-11836, CVE-2017-11837, CVE-2017-11838, CVE-2017-11839, CVE-2017-11840, CVE-2017-11841, CVE-2017-11843, CVE-2017-11846, CVE-2017-11858, CVE-2017-11859, CVE-2017-11861, CVE-2017-11862, CVE-2017-11866, CVE-2017-11869, CVE-2017-11871, and CVE-2017-11873.
Weakness: CWE-119
Which versions are affected by CVE-2017-11870?
2 open source packages ship an affected version, including Microsoft.ChakraCore. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
Microsoft.ChakraCore NuGet | All versions | 1.7.4 |
Microsoft.ChakraCore NuGet | All versions | 1.7.4 |
Products include Microsoft Chakracore, Microsoft Edge.
How do I fix CVE-2017-11870?
Upgrade Microsoft.ChakraCore to 1.7.4 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2017-11870 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-11870 exists.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Microsoft Chakracore
Sources
Also known as GHSA-9f2p-wm46-6m5f.