Per review feedback on #21741: File.canRead/canWrite/canExecute,
exists/isDirectory/isFile/isHidden only inspect a path, so move them
under the path-injection[read] sub-kind. Update TaintedPath.expected
and the experimental CWE-073 expected to match.
Introduce a new Models-as-Data sink sub-kind path-injection[read] for
models that only read from or inspect a path. The general
java/path-injection query and its PathInjectionSanitizer barrier
continue to consider both path-injection and path-injection[read]
sinks, so no alerts are lost. The java/zipslip query deliberately
selects only path-injection sinks, since read-only accesses such as
ClassLoader.getResource or FileInputStream are outside the archive
extraction threat model.
Addresses https://github.com/github/codeql/issues/21606 along the lines
proposed on the issue thread: prefer path-injection[read] over a
[create] sub-kind so that miscategorizing a sink causes a false
positive (easy to spot) rather than a false negative.
- shared/mad/codeql/mad/ModelValidation.qll: allow path-injection[...]
as a valid sink kind.
- java/ql/lib/ext/*.model.yml: relabel the models that PR #12916
migrated from the historical read-file kind (plus the newer
ClassLoader resource-lookup variants that share the same read-only
semantics).
- java/ql/lib/semmle/code/java/security/TaintedPathQuery.qll and
PathSanitizer.qll: select both path-injection and
path-injection[read] sinks/barriers.
- java/ql/lib/semmle/code/java/security/ZipSlipQuery.qll: keep only
path-injection, with a comment explaining why path-injection[read]
is excluded.
- java/ql/test/query-tests/security/CWE-022/semmle/tests/ZipTest.java:
add m7 regression covering the Dubbo-style classpath lookup from
issue #21606 and assert no alert is produced.
- Update TaintedPath.expected for the renamed kinds in the models list.
- Add change-notes under java/ql/lib/change-notes and
java/ql/src/change-notes.
PathNormalizeSanitizer recognized Path.normalize() and
File.getCanonicalPath()/getCanonicalFile(), but not Path.toRealPath().
toRealPath() is strictly stronger than normalize() (resolves symlinks
and verifies file existence in addition to normalizing ".." components),
and is functionally equivalent to File.getCanonicalPath() for the NIO.2
API. CERT FIO16-J and OWASP both recommend it for path traversal defense.
This adds toRealPath to PathNormalizeSanitizer alongside normalize,
reducing false positives for code using idiomatic NIO.2 path handling.
