CVE-2020-25887 : Vulnerability Insights and Analysis
Learn about CVE-2020-25887, a buffer overflow vulnerability in Mongoose 6.18 that could allow attackers to execute arbitrary code or cause denial of service. Find mitigation steps and updates here.
CVE-2020-25887 involves a buffer overflow in mg_resolve_from_hosts_file in Mongoose 6.18 when reading from a manipulated hosts file.
Understanding CVE-2020-25887
What is CVE-2020-25887?
CVE-2020-25887 is a vulnerability in Mongoose 6.18 that allows for a buffer overflow when processing a specially crafted hosts file.
The Impact of CVE-2020-25887
This vulnerability could be exploited by an attacker to execute arbitrary code or cause a denial of service on systems running the affected version of Mongoose.
Technical Details of CVE-2020-25887
Vulnerability Description
The vulnerability exists in the mg_resolve_from_hosts_file function of Mongoose 6.18, triggered by reading from a malicious hosts file.
Affected Systems and Versions
- Affected Version: Mongoose 6.18
- Vendor: n/a
- Product: n/a
Exploitation Mechanism
The buffer overflow occurs due to insufficient bounds checking when processing host file entries, allowing an attacker to overwrite adjacent memory locations.
Mitigation and Prevention
Immediate Steps to Take
- Disable access to the hosts file if not required for operation.
- Implement input validation to prevent malicious entries in the hosts file.
Long-Term Security Practices
- Regularly update software to patched versions.
- Conduct security audits to identify and address vulnerabilities proactively.
Patching and Updates
Apply patches or updates provided by the software vendor to address the buffer overflow vulnerability in Mongoose 6.18.