🚨 [security] Update addressable 2.8.7 → 2.9.0 (minor)

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🚨 Your current dependencies have known security vulnerabilities 🚨

This dependency update fixes known security vulnerabilities. Please see the details below and assess their impact carefully. We recommend to merge and deploy this as soon as possible!

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Here is everything you need to know about this update. Please take a good look at what changed and the test results before merging this pull request.

What changed?

↗️ addressable (indirect, 2.8.7 → 2.9.0) · Repo · Changelog

Security Advisories 🚨

🚨 Addressable has a Regular Expression Denial of Service in Addressable templates

Impact

Within the URI template implementation in Addressable, two classes of URI template generate regular expressions vulnerable to catastrophic backtracking:

1. Templates using the * (explode) modifier with any expansion operator (e.g., {foo*}, {+var*}, {#var*}, {/var*}, {.var*}, {;var*}, {?var*}, {&var*}) generate patterns with nested unbounded quantifiers that are O(2^n) when matched against a maliciously crafted URI.
2. Templates using multiple variables with the + or # operators (e.g., {+v1,v2,v3}) generate patterns with O(n^k) complexity due to the comma separator being within the matched character class, causing ambiguous backtracking across k variables.

When matched against a maliciously crafted URI, this can result in catastrophic backtracking and uncontrolled resource consumption, leading to denial of service. The first pattern was partially addressed in 2.8.10 for certain operator combinations. Both patterns are fully remediated in 2.9.0.

Users of the URI parsing capabilities in Addressable but not the URI template matching capabilities are unaffected.

Affected Versions

This vulnerability affects Addressable >= 2.3.0 (note: 2.3.0 and 2.3.1 were yanked; the earliest installable release is 2.3.2). It was partially fixed in version 2.8.10 and fully remediated in 2.9.0.

The vulnerability is more exploitable on MRI Ruby < 3.2 and on all versions of JRuby and TruffleRuby. MRI Ruby 3.2 and later ship with Onigmo 6.9, which introduces memoization that prevents catastrophic backtracking for the first class of template. JRuby and TruffleRuby do not implement equivalent memoization and remain vulnerable to all patterns.

This has been confirmed on the following runtimes:

Runtime	Status
MRI Ruby 2.6	Vulnerable
MRI Ruby 2.7	Vulnerable
MRI Ruby 3.0	Vulnerable
MRI Ruby 3.1	Vulnerable
MRI Ruby 3.2	Partially vulnerable
MRI Ruby 3.3	Partially vulnerable
MRI Ruby 3.4	Partially vulnerable
MRI Ruby 4.0	Partially vulnerable
JRuby 10.0	Vulnerable
TruffleRuby 21.2	Vulnerable

Workarounds

• Upgrade to MRI Ruby 3.2 or later, if your application does not use JRuby or TruffleRuby. The Onigmo memoization introduced in MRI Ruby 3.2 prevents catastrophic backtracking from nested unbounded quantifiers (pattern 1 above — templates using the * modifier). It does not reliably mitigate the O(n^k) multi-variable case (pattern 2), so upgrading Ruby alone may not be sufficient if your templates use {+v1,v2,...} or {#v1,v2,...} syntax.

• Avoid using vulnerable template patterns when matching user-supplied input on unpatched versions of the library:

  • Templates using the * (explode) modifier: {foo*}, {+var*}, {#var*}, {.var*}, {/var*}, {;var*}, {?var*}, {&var*}
  • Templates using multiple variables with the + or # operators: {+v1,v2}, {#v1,v2,v3}, etc.

• Apply a short timeout around any call to Template#match or Template#extract that processes user-supplied data.

References

• https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS
• https://cwe.mitre.org/data/definitions/1333.html
• https://www.regular-expressions.info/catastrophic.html

Credits

Discovered in collaboration with @jamfish.

For more information

If you have any questions or comments about this advisory:

• Open an issue

Release Notes

2.9.0 (from changelog)

• fixes ReDoS vulnerability in Addressable::Template#match (fixes incomplete remediation in 2.8.10)

2.8.10 (from changelog)

• fixes ReDoS vulnerability in Addressable::Template#match

2.8.9 (from changelog)

• Reduce gem size by excluding test files (#569)
• No need for bundler as development dependency (#571, 5fc1d93)
• idna/pure: stop building the useless COMPOSITION_TABLE (removes the Addressable::IDNA::COMPOSITION_TABLE constant) (#564)

2.8.8 (from changelog)

• Replace the unicode.data blob by a ruby constant (#561)
• Allow public_suffix 7 (#558)

Does any of this look wrong? Please let us know.

↗️ public_suffix (indirect, 6.0.1 → 7.0.5) · Repo · Changelog

Release Notes

7.0.5 (from changelog)

Fixed

• Fix release crash caused by unconditional rubocop/yard requires in Rakefile.

7.0.2 (from changelog)

Changed

• Excluded symlinks and unnecessary files from gem packaging. On Windows symlinks cannot be created without Administrator privileges or with developer mode enabled #496.

7.0.1 (from changelog)

Changed

• Updated definitions.

7.0.0 (from changelog)

Changed

• Updated definitions.
• Minimum Ruby version is 3.2

6.0.2 (from changelog)

Changed

• Updated definitions.

Does any of this look wrong? Please let us know.

Commits

See the full diff on Github. The new version differs by more commits than we can show here.

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