🛡️ Sentinel: [MEDIUM] Fix insecure randomness in ID generators#2201
🛡️ Sentinel: [MEDIUM] Fix insecure randomness in ID generators#2201nilsreichardt wants to merge 2 commits into
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Replaced `Random()` with `Random.secure()` in ID and random string generators to prevent predictability vulnerabilities. Affected files: - `lib/common_domain_models/lib/src/ids/src/id.dart` - `lib/abgabe/abgabe_client_lib/lib/src/models/auto_id_generator.dart` - `lib/sharezone_utils/lib/src/random_string/random_string.dart` Co-authored-by: nilsreichardt <24459435+nilsreichardt@users.noreply.github.com>
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Replaced `Random()` with `Random.secure()` in ID and random string generators to prevent predictability vulnerabilities. Affected files: - `lib/common_domain_models/lib/src/ids/src/id.dart` - `lib/abgabe/abgabe_client_lib/lib/src/models/auto_id_generator.dart` - `lib/sharezone_utils/lib/src/random_string/random_string.dart` Formatted `.jules/sentinel.md` using prettier to fix CI checks. Co-authored-by: nilsreichardt <24459435+nilsreichardt@users.noreply.github.com>
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Code Review
This pull request correctly addresses a medium-severity security vulnerability by replacing the insecure Random() with Random.secure() for generating identifiers. The changes effectively mitigate the risk of predictable IDs. I've added a couple of minor suggestions to align the code with the repository's Dart style guide by using final for variables that are not reassigned.
| String randomString(int length) { | ||
| var rand = Random(); | ||
| // Use Random.secure() to prevent predictability of random strings | ||
| var rand = Random.secure(); |
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The rand variable is only assigned once. It's preferable to declare it as final to adhere to the style guide, which promotes immutability for variables that are not reassigned.
| var rand = Random.secure(); | |
| final rand = Random.secure(); |
References
- The style guide (line 101) states to follow a consistent rule for
varandfinalon local variables. Usingfinalfor variables that are not reassigned is a standard Dart convention that aligns with this rule. (link)
| String randomIDString(int length) { | ||
| var rand = Random(); | ||
| // Use Random.secure() to prevent predictability of generated IDs | ||
| var rand = Random.secure(); |
There was a problem hiding this comment.
The rand variable is only assigned once. It's preferable to declare it as final to adhere to the style guide, which promotes immutability for variables that are not reassigned.
| var rand = Random.secure(); | |
| final rand = Random.secure(); |
References
- The style guide (line 101) states to follow a consistent rule for
varandfinalon local variables. Usingfinalfor variables that are not reassigned is a standard Dart convention that aligns with this rule. (link)
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🚨 Severity: MEDIUM
💡 Vulnerability: Insecure Randomness -
Random()was used to generate IDs, tokens, and random strings instead ofRandom.secure().🎯 Impact: The standard
Random()uses a predictable Pseudo-Random Number Generator (PRNG). Attackers could potentially determine the internal state and predict past or future IDs and tokens, leading to potential session hijacking, ID guessing, or unauthorized access.🔧 Fix: Replaced occurrences of
Random()withRandom.secure()inId.generate,AutoIdGenerator,randomString, andrandomIDStringto ensure cryptographically secure unpredictability. Added a corresponding Sentinel learning journal entry.✅ Verification: Verified using
sz testandsz analyzeto ensure functionality and syntax checks pass. The generated identifiers now rely on the secure source provided bydart:math.PR created automatically by Jules for task 8930466139142670294 started by @nilsreichardt