CVE-2018-20796 Explained : Impact and Mitigation
Learn about CVE-2018-20796, a vulnerability in GNU C Library (glibc) versions 2.29 and below, allowing Uncontrolled Recursion. Find out the impact, affected systems, exploitation method, and mitigation steps.
A vulnerability in the GNU C Library (glibc) has been identified, allowing for Uncontrolled Recursion in certain versions.
Understanding CVE-2018-20796
What is CVE-2018-20796?
The vulnerability exists in the check_dst_limits_calc_pos_1 function within glibc versions 2.29 and below, leading to Uncontrolled Recursion.
The Impact of CVE-2018-20796
This vulnerability can be exploited using specific input in the grep command, potentially allowing attackers to execute arbitrary code or crash applications.
Technical Details of CVE-2018-20796
Vulnerability Description
The vulnerability in glibc's check_dst_limits_calc_pos_1 function allows for Uncontrolled Recursion, posing a security risk.
Affected Systems and Versions
- GNU C Library (glibc) versions 2.29 and below
Exploitation Mechanism
- Attackers can exploit this vulnerability by providing crafted input to the grep command.
Mitigation and Prevention
Immediate Steps to Take
- Apply patches provided by the vendor to address the vulnerability.
- Monitor vendor advisories for updates and security patches.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions.
- Implement network security measures to detect and prevent malicious activities.
- Conduct regular security audits and penetration testing to identify vulnerabilities.
Patching and Updates
- Install security updates and patches released by the GNU C Library to mitigate the vulnerability.