CVE-2020-1915 : What You Need to Know
Learn about CVE-2020-1915, an out-of-bounds read vulnerability in the JavaScript Interpreter of Facebook Hermes, potentially leading to denial of service attacks or memory corruption. Find mitigation steps here.
Facebook Hermes prior to commit 8cb935cd3b2321c46aa6b7ed8454d95c75a7fca0 allows an out-of-bounds read vulnerability in the JavaScript Interpreter, potentially leading to a denial of service attack or memory corruption.
Understanding CVE-2020-1915
Facebook Hermes suffers from an out-of-bounds read vulnerability that can be exploited through crafted JavaScript, affecting versions prior to commit 8cb935cd3b2321c46aa6b7ed8454d95c75a7fca0.
What is CVE-2020-1915?
CVE-2020-1915 is an out-of-bounds read vulnerability in the JavaScript Interpreter of Facebook Hermes, enabling attackers to trigger denial of service attacks or memory corruption when handling malicious JavaScript code.
The Impact of CVE-2020-1915
This vulnerability can lead to a denial of service attack or further memory corruption, predominantly if untrusted JavaScript is evaluated by the application using Facebook Hermes. Most React Native applications are unaffected by this issue.
Technical Details of CVE-2020-1915
Facebook Hermes CVE-2020-1915 involves the following technical aspects:
Vulnerability Description
The vulnerability allows attackers to perform an out-of-bounds read in the JavaScript Interpreter, potentially resulting in a denial of service attack or memory corruption.
Affected Systems and Versions
- Product: Hermes
- Vendor: Facebook
- Affected Versions: Prior to commit 8cb935cd3b2321c46aa6b7ed8454d95c75a7fca0
Exploitation Mechanism
The vulnerability can be exploited by crafting malicious JavaScript code, primarily affecting applications that allow the execution of untrusted JavaScript.
Mitigation and Prevention
To address CVE-2020-1915, the following steps can be taken:
Immediate Steps to Take
- Update Facebook Hermes to the latest commit (8cb935cd3b2321c46aa6b7ed8454d95c75a7fca0) or a version that contains the corresponding patch.
- Restrict executing untrusted JavaScript in applications utilizing Hermes.
Long-Term Security Practices
- Regularly monitor security advisories from Facebook for any updates or patches related to CVE-2020-1915.
- Implement secure coding practices to minimize the risk of similar vulnerabilities.
Patching and Updates
- Apply patches or updates provided by Facebook promptly to mitigate the CVE-2020-1915 vulnerability.