CVE-2021-46539 : Exploit Details and Defense Strategies
Learn about CVE-2021-46539 affecting Cesanta MJS v2.20.0, leading to a SEGV vulnerability via /lib/x86_64-linux-gnu/libc.so.6+0x45a1f causing a Denial of Service (DoS). Find mitigation steps to secure your system.
Cesanta MJS v2.20.0 has a SEGV vulnerability via /lib/x86_64-linux-gnu/libc.so.6+0x45a1f leading to a DoS.
Understanding CVE-2021-46539
This CVE involves a vulnerability in Cesanta MJS v2.20.0 that can result in a Denial of Service (DoS) attack.
What is CVE-2021-46539?
The vulnerability in Cesanta MJS v2.20.0 allows attackers to trigger a SEGV vulnerability through a specific library path, potentially causing a DoS.
The Impact of CVE-2021-46539
Exploitation of this vulnerability could lead to a Denial of Service condition where the affected system becomes unresponsive or crashes.
Technical Details of CVE-2021-46539
This section covers the technical aspects of the CVE.
Vulnerability Description
Cesanta MJS v2.20.0 contains a SEGV vulnerability via /lib/x86_64-linux-gnu/libc.so.6+0x45a1f, potentially enabling DoS attacks.
Affected Systems and Versions
- Affected Versions: Cesanta MJS v2.20.0
- Affected Products and Vendors: Not applicable
Exploitation Mechanism
The vulnerability can be exploited by triggering a specific code path within the Cesanta MJS v2.20.0 library, resulting in a denial of service condition.
Mitigation and Prevention
Actions to mitigate the impact of CVE-2021-46539.
Immediate Steps to Take
- Apply security patches or updates provided by the vendor.
- Monitor network traffic for any unusual activity that could indicate exploitation.
Long-Term Security Practices
- Implement network segmentation to contain potential attacks.
- Keep software and libraries up to date to prevent known vulnerabilities.
Patching and Updates
Regularly check for patches and updates from Cesanta to address this vulnerability.