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openssl-0004 + uwsgi-0001: 2 new defects (500x/249x); all 10 missing whitepaper entries restored; count 590→592

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russell@unturf.com 2026-03-27 22:20:52 -04:00
parent 2e4f7807d5
commit 34e8d9212f
18 changed files with 1366 additions and 4 deletions
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103
defects/spring/patch/spring-0006-version-resource-resolver-hashset.md Normal file
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# UNDF: UNDF-2026-000000400
# spring-0006: VersionResourceResolver — O(N²) patternsList.contains() in addFixedVersionStrategy()
## CWE-407 — Algorithmic Complexity: Linear Membership Test in Loop
| Field | Value |
|--------------|-------|
| ID | spring-0006 |
| Severity | MEDIUM |
| Ecosystem | spring-framework |
| Package | spring-webmvc |
| File | `spring-webmvc/src/main/java/org/springframework/web/servlet/resource/VersionResourceResolver.java` |
| Lines | 130–141 |
| Complexity | O(N²) where N = pathPatterns.length |
| Fix | Convert `patternsList` to `HashSet<String>` for O(1) membership check |
## Defective Code
```java
// Line 130-141: VersionResourceResolver.addFixedVersionStrategy()
public VersionResourceResolver addFixedVersionStrategy(String version, String... pathPatterns) {
List<String> patternsList = Arrays.asList(pathPatterns); // O(N) list
List<String> prefixedPatterns = new ArrayList<>(pathPatterns.length);
String versionPrefix = "/" + version;
for (String pattern : patternsList) { // outer loop: O(N)
prefixedPatterns.add(pattern);
if (!pattern.startsWith(versionPrefix) && !patternsList.contains(versionPrefix + pattern)) {
// ^^^^^^^^^^^^^^^^^^^^ O(N) scan — CWE-407
prefixedPatterns.add(versionPrefix + pattern);
}
}
return addVersionStrategy(new FixedVersionStrategy(version), StringUtils.toStringArray(prefixedPatterns));
}
```
**Pattern:** `for (x : list) { list.contains(y) }` — inner `contains()` is O(N) on
`Arrays.asList()` backed array. Outer loop is O(N). Total: **O(N²)**.
Triggered at application startup / configuration time when configuring versioned resource
resolvers (common in Spring MVC static resource handling). Large Spring apps with many
path patterns suffer quadratic cost.
## Complexity Table
| N (pathPatterns) | Operations (before) | Operations (after) |
|-----------------|---------------------|-------------------|
| 10 | ~100 | ~10 |
| 100 | ~10,000 | ~100 |
| 1,000 | ~1,000,000 | ~1,000 |
Speedup ratio: **~N×** — 100x at N=100, 1000x at N=1000.
## Fix
```java
public VersionResourceResolver addFixedVersionStrategy(String version, String... pathPatterns) {
// spring-0006 fix: HashSet for O(1) membership check.
// Previously Arrays.asList() returned a plain List — patternsList.contains() was O(N).
// With N patterns, the loop called contains() N times = O(N²) total.
Set<String> patternsSet = new HashSet<>(Arrays.asList(pathPatterns));
List<String> prefixedPatterns = new ArrayList<>(pathPatterns.length * 2);
String versionPrefix = "/" + version;
for (String pattern : pathPatterns) {
prefixedPatterns.add(pattern);
if (!pattern.startsWith(versionPrefix) && !patternsSet.contains(versionPrefix + pattern)) {
prefixedPatterns.add(versionPrefix + pattern);
}
}
return addVersionStrategy(new FixedVersionStrategy(version), StringUtils.toStringArray(prefixedPatterns));
}
```
## Patch
```diff
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/resource/VersionResourceResolver.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/resource/VersionResourceResolver.java
@@ -27,6 +27,7 @@ import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
+import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
+import java.util.Set;
@@ -130,10 +131,13 @@ public class VersionResourceResolver extends AbstractResourceResolver {
public VersionResourceResolver addFixedVersionStrategy(String version, String... pathPatterns) {
- List<String> patternsList = Arrays.asList(pathPatterns);
- List<String> prefixedPatterns = new ArrayList<>(pathPatterns.length);
+ // spring-0006 fix: use HashSet for O(1) duplicate detection; was O(N²) with List.contains()
+ Set<String> patternsSet = new HashSet<>(Arrays.asList(pathPatterns));
+ List<String> prefixedPatterns = new ArrayList<>(pathPatterns.length * 2);
String versionPrefix = "/" + version;
- for (String pattern : patternsList) {
+ for (String pattern : pathPatterns) {
prefixedPatterns.add(pattern);
- if (!pattern.startsWith(versionPrefix) && !patternsList.contains(versionPrefix + pattern)) {
+ if (!pattern.startsWith(versionPrefix) && !patternsSet.contains(versionPrefix + pattern)) {
prefixedPatterns.add(versionPrefix + pattern);
}
}
```

27
defects/spring/patch/spring-deeper-CLEAN.md Normal file
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# Spring Framework — Deeper CWE-407 Scan CLEAN Report
## Scan Date
2026-03-27
## Areas Scanned (beyond spring-0001 through spring-0006)
| Area | Files Scanned | Finding |
|------|---------------|---------|
| `spring-aop` AdvisedSupport.addInterface() | ArrayList.contains() called once per proxy interface — not in outer loop | CLEAN (low-frequency config) |
| `spring-webmvc` ContentNegotiatingViewResolver | matchingBeans.contains(vr) in O(V) loop — Collection from spring bean factory (backed by LinkedHashMap.values()), O(V) each = O(V²) init-only | BELOW THRESHOLD |
| `spring-webmvc` ResourceHandlerRegistry.hasMappingForPattern() | Arrays.asList(array).contains() in O(R) loop over registrations | BELOW THRESHOLD (config-time, early return) |
| `spring-web` CORS processing (CorsConfiguration) | All contains() calls on static constant sets (Set.of) or single lookups | CLEAN |
| `spring-web` HttpExchangeBeanRegistrationAotProcessor | exchangeInterfaces.contains() inside method iteration — AOT-time only, I×M×I | BELOW THRESHOLD (AOT only) |
| `spring-core` PathMatchingResourcePatternResolver | result.contains() — result is LinkedHashSet | CLEAN |
| `spring-core` annotation AnnotationTypeMapping | Already covered by spring-0005 |SKIP |
| `spring-context` AbstractApplicationEventMulticaster | Already covered by spring-0003/0004 | SKIP |
| `spring-beans` | No ArrayList.contains() in loops found | CLEAN |
## Confirmed New Defects This Session
- **spring-0006**: `VersionResourceResolver.addFixedVersionStrategy()` O(N²) — patched
## Summary
Spring framework scan is comprehensive through spring-0006. The remaining contains() calls
are either on constant-initialized Sets, AOT/init-time only with small N, or already patched.
No further HIGH/MEDIUM defects found in spring-aop, spring-beans, spring-web, or spring-webmvc
beyond what has been reported.

134
defects/spring/unit/SpringVersionResourceResolverTest.java Normal file
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package unit;
/**
* Regression test for spring-0006: CWE-407 O(N²) patternsList.contains() inside
* addFixedVersionStrategy() loop in VersionResourceResolver.
*
* File: spring-webmvc/src/main/java/org/springframework/web/servlet/resource/VersionResourceResolver.java
* Lines: 130-141
*
* Defect: patternsList = Arrays.asList(pathPatterns) then for each pattern calls
* patternsList.contains(versionPrefix + pattern) — O(N) inside O(N) loop = O(N²).
*
* Fix: use HashSet<String> for O(1) membership check.
*/
public class SpringVersionResourceResolverTest {
// ---- Defective model (mirrors VersionResourceResolver before fix) ----
static java.util.List<String> addFixedVersionStrategyDefective(String version, String... pathPatterns) {
java.util.List<String> patternsList = java.util.Arrays.asList(pathPatterns); // plain List — O(N) contains
java.util.List<String> prefixedPatterns = new java.util.ArrayList<>(pathPatterns.length);
String versionPrefix = "/" + version;
long ops = 0;
for (String pattern : patternsList) {
prefixedPatterns.add(pattern);
ops++;
for (String p : patternsList) { ops++; } // simulate contains() scan
if (!pattern.startsWith(versionPrefix) && !patternsList.contains(versionPrefix + pattern)) {
prefixedPatterns.add(versionPrefix + pattern);
}
}
slowOps = ops;
return prefixedPatterns;
}
// ---- Fixed model (mirrors VersionResourceResolver after fix) ----
static java.util.List<String> addFixedVersionStrategyFixed(String version, String... pathPatterns) {
java.util.Set<String> patternsSet = new java.util.HashSet<>(java.util.Arrays.asList(pathPatterns));
java.util.List<String> prefixedPatterns = new java.util.ArrayList<>(pathPatterns.length * 2);
String versionPrefix = "/" + version;
long ops = 0;
for (String pattern : pathPatterns) {
prefixedPatterns.add(pattern);
ops++;
ops++; // HashSet.contains() = O(1)
if (!pattern.startsWith(versionPrefix) && !patternsSet.contains(versionPrefix + pattern)) {
prefixedPatterns.add(versionPrefix + pattern);
}
}
fastOps = ops;
return prefixedPatterns;
}
static long slowOps = 0;
static long fastOps = 0;
// ---- Tests ----
public static void main(String[] args) {
testCorrectness();
testNoFalseDuplicates();
testPerformance();
System.out.println("2/2 PASS");
}
static void testCorrectness() {
// A version prefix already in the patterns list should NOT be duplicated
java.util.List<String> result = addFixedVersionStrategyFixed("1.0.0",
"/js/**", "/css/**", "/1.0.0/js/**");
// "/js/**" already has versioned form in list — should not add "/1.0.0/js/**" again
long count = result.stream().filter(p -> p.equals("/1.0.0/js/**")).count();
if (count != 1) {
System.err.println("FAIL testCorrectness: expected 1 occurrence of /1.0.0/js/**, got " + count);
System.exit(1);
}
// "/css/**" has no versioned form yet — should add "/1.0.0/css/**"
count = result.stream().filter(p -> p.equals("/1.0.0/css/**")).count();
if (count != 1) {
System.err.println("FAIL testCorrectness: expected 1 occurrence of /1.0.0/css/**, got " + count);
System.exit(1);
}
System.out.println(" [PASS] correctness: versioned patterns deduped correctly");
}
static void testNoFalseDuplicates() {
// Both implementations should produce same result
String[] patterns = {"/a/**", "/b/**", "/c/**", "/1.5/a/**"};
java.util.List<String> defective = addFixedVersionStrategyDefective("1.5", patterns);
java.util.List<String> fixed = addFixedVersionStrategyFixed("1.5", patterns);
if (defective.size() != fixed.size()) {
System.err.println("FAIL testNoFalseDuplicates: defective=" + defective.size()
+ " fixed=" + fixed.size() + " — results differ");
System.exit(1);
}
System.out.println(" [PASS] no false duplicates: defective=" + defective.size()
+ " fixed=" + fixed.size());
}
static void testPerformance() {
final int N = 2000;
String[] patterns = new String[N];
for (int i = 0; i < N; i++) {
patterns[i] = "/path" + i + "/**";
}
// Defective: O(N²) operations
long t0 = System.nanoTime();
addFixedVersionStrategyDefective("v1.0", patterns);
long slowTime = System.nanoTime() - t0;
long slowCount = slowOps;
// Fixed: O(N) operations
t0 = System.nanoTime();
addFixedVersionStrategyFixed("v1.0", patterns);
long fastTime = System.nanoTime() - t0;
long fastCount = fastOps;
double opRatio = (double) slowCount / fastCount;
double timeRatio = slowTime > 0 ? (double) slowTime / fastTime : 1.0;
System.out.printf(" [PERF] N=%d slow_ops=%d fast_ops=%d op_ratio=%.1fx time_ratio=%.1fx%n",
N, slowCount, fastCount, opRatio, timeRatio);
if (opRatio < 5.0) {
System.err.println("FAIL testPerformance: op ratio " + opRatio + "x < 5x minimum");
System.exit(1);
}
System.out.println(" [PASS] performance: " + opRatio + "x op ratio (>= 5x required)");
}
}