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Absolute or relative path names may contain file links such as symbolic (soft) links, hard links, short cuts, shadows, aliases, and junctions rather than canonical paths. These aliases must be fully resolved before any file validation operations are performed. For example, the final target of a symbolic link called trace might be the path name /home/system/trace. Path names may also contain special file names that make validation difficult:
- â".â refers to the directory itself.
- Inside a directory, the special file name â"..â refers to the directoryâs parent directory.
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FIO02-C. Canonicalize path names originating from untrusted sources | ||||
FIO02-CPP. Canonicalize path names originating from untrusted sources | ||||
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="81e3a67f4c0f24a9-798c3f64-45f04d9d-a7f68ab8-3a60a3fdb83d7220d2facfb8"><ac:plain-text-body><![CDATA[ | [ISO/IEC TR 24772:2010 | http://www.aitcnet.org/isai/] | "Path Traversal [EWR]" | ]]></ac:plain-text-body></ac:structured-macro> |
CWE-171, "Cleansing, Canonicalization, and Comparison Errors" | ||||
| CWE-647, "Use of Non-Canonical URL Paths for Authorization Decisions" |
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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="67fad664c5d0fa6f-510a8927-49b1436d-b5f3a454-82730984f3854d7abf8d5d65"><ac:plain-text-body><![CDATA[ | [[API 2006 | AA. Bibliography#API 06]] | [method getCanonicalPath() | http://java.sun.com/javase/6/docs/api/java/io/File.html#getCanonicalPath()] | ]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="b32477521b76a343-1c001c29-4fb2499c-b0c8a128-7b8882944a95c581a452cc77"><ac:plain-text-body><![CDATA[ | [[Harold 1999 | AA. Bibliography#Harold 99]] |
| ]]></ac:plain-text-body></ac:structured-macro> |
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