Some environments provide environment pointers that are valid when main() is called, but may be invalided by operations that modify the environment.
Section J.5.1 of the C standard Standard [ISO/IEC 9899:2011] states:
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The environment block passed to
mainandwmainis a "frozen" copy of the current environment. If you subsequently change the environment via a call to_putenvor_wputenv, the current environment (as returned bygetenv/_wgetenvand the_environ/_wenvironvariable) will change, but the block pointed to byenvpwill not change.
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Search for vulnerabilities resulting from the violation of this rule on the CERT website.
Related Guidelines
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Bibliography
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| ] | Section J.5.1, "Environment |
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| Arguments" |
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