CVE-2017-17562 : Vulnerability Insights and Analysis
Learn about CVE-2017-17562, a remote code execution vulnerability in Embedthis GoAhead before version 3.6.5, allowing attackers to execute code by exploiting CGI functionality. Find out how to mitigate and prevent this vulnerability.
A remote code execution vulnerability in Embedthis GoAhead before version 3.6.5 allows attackers to execute code by exploiting CGI functionality.
Understanding CVE-2017-17562
What is CVE-2017-17562?
The vulnerability arises when CGI is enabled, and a CGI program is dynamically linked, allowing untrusted HTTP request parameters to be used in the cgiHandler function within cgi.c.
The Impact of CVE-2017-17562
Exploiting this vulnerability involves leveraging specific parameter names like LD_PRELOAD to execute remote code by posting a shared object payload in the request body.
Technical Details of CVE-2017-17562
Vulnerability Description
The issue lies in the initialization of the environment for forked CGI scripts, enabling attackers to execute remote code.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions affected: All versions before 3.6.5
Exploitation Mechanism
- Attackers can exploit the vulnerability by utilizing the glibc dynamic linker's behavior and specific parameter names like LD_PRELOAD.
Mitigation and Prevention
Immediate Steps to Take
- Disable CGI functionality if not required
- Update to version 3.6.5 or later to mitigate the vulnerability
Long-Term Security Practices
- Regularly monitor and apply security patches
- Conduct security audits to identify and address vulnerabilities
Patching and Updates
- Apply patches provided by Embedthis GoAhead to address the vulnerability