CVE-2020-1752 : Vulnerability Insights and Analysis
Learn about CVE-2020-1752, a high-severity glibc vulnerability allowing local attackers to execute arbitrary code. Find mitigation steps and patching advice here.
This CVE record pertains to a use-after-free vulnerability in glibc affecting versions 2.14 and later, with potential exploitation leading to arbitrary code execution.
Understanding CVE-2020-1752
What is CVE-2020-1752?
The CVE-2020-1752 is a use-after-free vulnerability in glibc involving tilde expansion, where directory paths with specific syntax could be manipulated for malicious code execution.
The Impact of CVE-2020-1752
The vulnerability could allow a local attacker to exploit the flaw and execute arbitrary code, posing a significant threat to affected systems.
Technical Details of CVE-2020-1752
Vulnerability Description
The vulnerability stemmed from a flaw in how tilde expansion was carried out in glibc version 2.14 and later, potentially leading to use-after-free scenarios. It was addressed in version 2.32.
Affected Systems and Versions
- Affected: versions 2.14 and later
- Fixed: version 2.32
Exploitation Mechanism
- Local attacker creates a crafted path with tilde and a valid username
- Processing by glob function could result in arbitrary code execution
Mitigation and Prevention
Immediate Steps to Take
- Update glibc to version 2.32 or above
- Monitor vendor advisories for patches and updates
Long-Term Security Practices
- Regularly update software and libraries
- Implement strict input validation and sanitation practices
Patching and Updates
- Apply patches promptly after release
- Follow vendor recommendations and best practices