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Using path names from untrusted sources without first canonicalizing them and then validating them can result in directory traversal and path equivalence vulnerabilities.
Rule | Severity | Likelihood | Remediation Cost | Priority | Level |
|---|---|---|---|---|---|
FIO16-J | Medium | Unlikely | Medium | P4 | L3 |
Automated Detection
| Tool | Version | Checker | Description | ||||||
|---|---|---|---|---|---|---|---|---|---|
| The Checker Framework |
| Tainting Checker | Trust and security errors (see Chapter 8) | ||||||
| Coverity | 7.5 | BAD_EQ | Implemented | ||||||
| Fortify | 1.0 | Path_Manipulation | Implemented | ||||||
| Parasoft Jtest |
| CERT.FIO16.CDBV | Canonicalize data before validation |
Related Vulnerabilities
CVE-2005-0789 describes a directory traversal vulnerability in LimeWire 3.9.6 through 4.6.0 that allows remote attackers to read arbitrary files via a .. (dot dot) in a magnet request.
CVE-2008-5518 describes multiple directory traversal vulnerabilities in the web administration console in Apache Geronimo Application Server 2.1 through 2.1.3 on Windows that allow remote attackers to upload files to arbitrary directories.
Related Guidelines
FIO02-C. Canonicalize path names originating from tainted sources | |
VOID FIO02-CPP. Canonicalize path names originating from untrusted sources | |
Path Traversal [EWR] | |
CWE-171, Cleansing, Canonicalization, and Comparison Errors |
Android Implementation Details
This rule is applicable in principle to Android. Please refer to the Android-specific instance of this rule: DRD08-J. Always canonicalize a URL received by a content provider.
Bibliography
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