GHSA-9qvm-2vhf-q649
RubyGems Regular Expression Denial of Service
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| RubyGems | rubygems-update | < 1.8.23.2 | 1.8.23.2 |
| RubyGems | rubygems-update | >= 1.8.24, < 1.8.27 | 1.8.27 |
| RubyGems | rubygems-update | >= 2.0.0, < 2.0.10 | 2.0.10 |
| RubyGems | rubygems-update | >= 2.1.0, < 2.1.5 | 2.1.5 |
Details
As written in the advisory (Markdown source, shown as plain text).
Algorithmic complexity vulnerability in `Gem::Version::ANCHORED_VERSION_PATTERN` in `lib/rubygems/version.rb` in RubyGems before 1.8.23.2, 1.8.24 through 1.8.26, 2.0.x before 2.0.10, and 2.1.x before 2.1.5, as used in Ruby 1.9.0 through 2.0.0p247, allows remote attackers to cause a denial of service (CPU consumption) via a crafted gem version that triggers a large amount of backtracking in a regular expression. NOTE: this issue is due to an incomplete fix for CVE-2013-4287.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2013-4363
- https://github.com/rubygems/rubygems
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rubygems-update/CVE-2013-4363.yml
- https://web.archive.org/web/20170331150441/https://puppet.com/security/cve/cve-2013-4363
- http://blog.rubygems.org/2013/09/24/CVE-2013-4363.html
- http://www.openwall.com/lists/oss-security/2013/09/14/3
- http://www.openwall.com/lists/oss-security/2013/09/18/8
- http://www.openwall.com/lists/oss-security/2013/09/20/1