Gnu · Glibc · CVE-2017-17562
**Name of the Vulnerable Software and Affected Versions**
Embedthis GoAhead versions prior to 3.6.5
**Description**
The issue is related to the initialization of the environment of forked CGI scripts using untrusted HTTP request parameters in the `cgiHandler` function. This can be abused for remote code execution when combined with the glibc dynamic linker, using special parameter names such as `LD PRELOAD`. An attacker can send a shared object payload in the body of a request and reference it using `/proc/self/fd/0`. The vulnerability allows a remote attacker to execute arbitrary code by sending a specially crafted HTTP request that includes parameters with the "LD " prefix, which are used to create environment variables.
**Recommendations**
For Embedthis GoAhead versions prior to 3.6.5, update to version 3.6.5 or later to resolve the issue. As a temporary workaround, consider disabling the `cgiHandler` function or restricting the use of dynamically linked CGI programs until a patch is available. Additionally, restrict access to the `LD PRELOAD` parameter to minimize the risk of exploitation.