Semmle 1.22
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Analysis in all applications

The following changes in version 1.19 affect Java analysis in all applications.

General improvements

  • The Java version required to build a project can now be configured by LGTM users in the lgtm.yml configuration file, provided an LGTM administrator has installed and configured a corresponding Java toolchain in a Maven Toolchains file. For example:
            java_version: 8

  • The extractor has been upgraded to support the extraction of code written using Java 11.

  • Path explanations have been added to the relevant security queries. Use QL for Eclipse to run queries and explore the data flow in results.

New queries

Query Tags Purpose
Arbitrary file write during archive extraction (“Zip Slip”) (java/zipslip) security, external/cwe/cwe-022 Identifies extraction routines that allow arbitrary file overwrite vulnerabilities. Results are shown on LGTM by default.
Missing catch of NumberFormatException (java/uncaught-number-format-exception) reliability, external/cwe/cwe-248 Finds calls to Integer.parseInt and similar string-to-number conversions that might raise a NumberFormatException without a corresponding catch-clause. Results are hidden on LGTM by default.

Changes to existing queries

Query Expected impact Change
Array index out of bounds (java/index-out-of-bounds) Fewer false positive results Results for arrays with a length evenly divisible by 3, or some greater number, and an index being increased with a similar stride length are no longer reported.
Confusing overloading of methods (java/confusing-method-signature) Fewer false positive results A correction to the inheritance relation ensures that spurious results on certain generic classes no longer occur.
Query built from user-controlled sources (java/sql-injection) More results SQL injection sinks from the Spring JDBC, MyBatis, and Hibernate frameworks are now reported.
Query built without neutralizing special characters (java/concatenated-sql-query) More results SQL injection sinks from the Spring JDBC, MyBatis, and Hibernate frameworks are now reported.
Unreachable catch clause (java/unreachable-catch-clause) Fewer false positive results Now accounts for calls to generic methods that throw generic exceptions.
Useless comparison test (java/constant-comparison) Fewer false positive results Constant comparisons guarding java.util.ConcurrentModificationException are no longer reported, as they are intended to always be false in the absence of API misuse.

Changes to QL libraries

  • The class ControlFlowNode (and by extension BasicBlock) has until now been directly equatable to Expr and Stmt. Exploiting these equalities, for example by using casts, is now deprecated, and the conversions Expr.getControlFlowNode() and Stmt.getControlFlowNode() should be used instead.
  • The default set of taint sources in the FlowSources library is extended to cover parameters annotated with Spring framework annotations indicating remote user input from servlets. This affects all security queries, which will yield additional results on projects that use the Spring Web framework.
  • The ParityAnalysis library is replaced with the more general ModulusAnalysis library, which improves the range analysis.

Changes to code extraction

Implicit calls to the instance initializer occurring in constructors are now extracted. This gives a more complete call graph and improves data flow from instance initializer blocks and instance field initialization expressions.

Additional changes for analysis in QL tools and applications only

There are no changes in this version that affect Java analysis only in QL for Eclipse, and the QL command-line tools.

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