CVE-2020-23321 Explained : Impact and Mitigation
Learn about CVE-2020-23321, a heap-buffer-overflow vulnerability in JerryScript 2.2.0, allowing attackers to execute arbitrary code. Find mitigation steps and updates here.
This CVE-2020-23321 article provides insights into a heap-buffer-overflow vulnerability in JerryScript 2.2.0.
Understanding CVE-2020-23321
What is CVE-2020-23321?
CVE-2020-23321 is a heap-buffer-overflow vulnerability located at lit-strings.c:431 in lit_read_code_unit_from_utf8 within JerryScript 2.2.0.
The Impact of CVE-2020-23321
This vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by triggering a buffer overflow.
Technical Details of CVE-2020-23321
Vulnerability Description
The vulnerability exists in lit_read_code_unit_from_utf8 in JerryScript 2.2.0, leading to a heap-buffer-overflow at lit-strings.c:431.
Affected Systems and Versions
- Affected Version: JerryScript 2.2.0
Exploitation Mechanism
The vulnerability can be exploited by crafting a specific input to trigger the buffer overflow.
Mitigation and Prevention
Immediate Steps to Take
- Apply the latest security patches provided by the vendor.
- Monitor vendor communications for updates and advisories.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions.
- Implement secure coding practices to prevent buffer overflows.
Patching and Updates
Ensure that JerryScript is updated to a version that contains a fix for the heap-buffer-overflow vulnerability.