CVE-2019-1010023 : Security Advisory and Response
Learn about CVE-2019-1010023 affecting GNU Libc. Understand the exploit, impact, affected versions, and mitigation steps to prevent privilege escalation. Stay secure with patches and updates.
GNU Libc current version is susceptible to a vulnerability where a loaded library can be replaced with a malicious ELF file, potentially allowing attackers to gain elevated privileges.
Understanding CVE-2019-1010023
The vulnerability involves re-mapping the current loaded library with a malicious ELF file, affecting the libld component.
What is CVE-2019-1010023?
The exploit occurs when an attacker tricks a victim into running the 'ldd' command on two ELF files, executing the malicious code.
The Impact of CVE-2019-1010023
In the worst-case scenario, the attacker may gain elevated privileges. However, upstream comments suggest that this issue is considered a non-security bug with no significant threat.
Technical Details of CVE-2019-1010023
Vulnerability Description
The vulnerability allows for the replacement of a loaded library with a malicious ELF file, potentially leading to privilege escalation.
Affected Systems and Versions
- Product: GNU Libc
- Vendor: GNU Libc
- Affected Version: current (At least as of 2018-02-16)
Exploitation Mechanism
- Attacker sends two ELF files to the victim
- Victim runs the 'ldd' command on the files
- Malicious code is inadvertently executed
Mitigation and Prevention
Immediate Steps to Take
- Apply patches and updates provided by the vendor
- Avoid running commands on untrusted files
Long-Term Security Practices
- Regularly update software and libraries
- Implement secure coding practices
Patching and Updates
It is crucial to stay updated with security patches and fixes to mitigate the risk of exploitation.