CVE-2020-27802 : Vulnerability Insights and Analysis
Learn about CVE-2020-27802, a vulnerability in UPX 4.0.0 that allows for a floating point exception via a crafted Mach-O file. Find out the impact, affected systems, and mitigation steps.
An floating point exception was discovered in the elf_lookup function in p_lx_elf.cpp in UPX 4.0.0 via a crafted Mach-O file.
Understanding CVE-2020-27802
An overview of the CVE-2020-27802 vulnerability affecting UPX 4.0.0.
What is CVE-2020-27802?
The CVE-2020-27802 vulnerability involves a floating point exception found in the elf_lookup function within p_lx_elf.cpp in UPX 4.0.0 when processing a specially crafted Mach-O file.
The Impact of CVE-2020-27802
This vulnerability could potentially lead to a denial of service (DoS) condition or arbitrary code execution when exploited by an attacker.
Technical Details of CVE-2020-27802
Insights into the technical aspects of CVE-2020-27802.
Vulnerability Description
- Vulnerability Type: Floating Point Exception
- Location: elf_lookup function in p_lx_elf.cpp
- Affected Version: UPX 4.0.0
Affected Systems and Versions
- Product: UPX
- Version: upx 4.0.0-git-87b73e5cfdc1+
Exploitation Mechanism
The vulnerability can be exploited by utilizing a specially crafted Mach-O file to trigger the floating point exception in the elf_lookup function.
Mitigation and Prevention
Best practices to mitigate and prevent the CVE-2020-27802 vulnerability.
Immediate Steps to Take
- Update UPX to a non-vulnerable version.
- Avoid opening untrusted Mach-O files.
Long-Term Security Practices
- Regularly update software and apply security patches.
- Implement proper input validation mechanisms.
Patching and Updates
Ensure UPX is regularly updated to the latest version to address known vulnerabilities.