CVE-2020-27797 : Vulnerability Insights and Analysis
Discover the impact of CVE-2020-27797 in UPX 4.0.0, allowing attackers to execute arbitrary code via a crafted Mach-O file. Learn about affected systems, exploitation, and mitigation steps.
UPX 4.0.0 contains a vulnerability that allows attackers to execute arbitrary code via a crafted Mach-O file.
Understanding CVE-2020-27797
An invalid memory address reference in the elf_lookup function in UPX 4.0.0 exposes a security flaw.
What is CVE-2020-27797?
The vulnerability in UPX 4.0.0 enables attackers to trigger arbitrary code execution by exploiting a flaw in the elf_lookup function.
The Impact of CVE-2020-27797
The vulnerability in UPX 4.0.0 poses a significant risk as it allows attackers to execute malicious code through a specially crafted Mach-O file.
Technical Details of CVE-2020-27797
UPX 4.0.0 vulnerability details and affected systems.
Vulnerability Description
An invalid memory address reference was found in the elf_lookup function in p_lx_elf.cpp in UPX 4.0.0 when processing a crafted Mach-O file.
Affected Systems and Versions
- Product: UPX
- Version: upx 4.0.0-git-87b73e5cfdc1+
Exploitation Mechanism
The vulnerability can be exploited by an attacker using a specially crafted Mach-O file to trigger the invalid memory address reference in the elf_lookup function.
Mitigation and Prevention
Steps to mitigate and prevent exploitation of CVE-2020-27797.
Immediate Steps to Take
- Update UPX to a patched version that addresses the vulnerability.
- Avoid opening untrusted Mach-O files.
Long-Term Security Practices
- Regularly update software and apply security patches.
- Implement proper input validation to prevent malformed files from being processed.
Patching and Updates
Ensure UPX is regularly updated to the latest version to patch known vulnerabilities.