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    CVE-2024-26146

    Rack is a modular Ruby web server interface. Carefully crafted headers can cause header parsing in Rack to take longer than expected resulting in a possible denial of service issue. Accept and Forwarded headers are impacted. Ruby 3.2 has mitigations for this problem, so Rack applications using Ruby 3.2 or newer are unaffected. This vulnerability is fixed in 2.0.9.4, 2.1.4.4, 2.2.8.1, and 3.0.9.1.

    Published:Feb 22, 2024
    Last Modified:Feb 14, 2025
    EPS:Feb 28, 2024
    EPSS Score:0.00572
    CVSS Score:5.3

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Rack
    Product
    Rack
    Vendor
    Rack Project
    Product
    Rack
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Redhat
    Product
    Satellite
    Vendor
    Redhat
    Product
    Satellite Capsule

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-492 Regular Expression Exponential Blowup

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    References

    https://discuss.rubyonrails.org/t/possible-denial-of-service-vulnerability-in-rack-header-parsing/84942
    https://github.com/rack/rack/commit/30b8e39a578b25d4bdcc082c1c52c6f164b59716
    https://github.com/rack/rack/commit/6c5d90bdcec0949f7ba06db62fb740dab394b582
    https://github.com/rack/rack/commit/a227cd793778c7c3a827d32808058571569cda6f
    https://github.com/rack/rack/commit/e4c117749ba24a66f8ec5a08eddf68deeb425ccd
    https://github.com/rack/rack/security/advisories/GHSA-54rr-7fvw-6x8f
    https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-26146.yml
    https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html
    https://security.netapp.com/advisory/ntap-20240510-0006/
    https://discuss.rubyonrails.org/t/possible-denial-of-service-vulnerability-in-rack-header-parsing/84942
    https://github.com/rack/rack/commit/30b8e39a578b25d4bdcc082c1c52c6f164b59716
    https://github.com/rack/rack/commit/6c5d90bdcec0949f7ba06db62fb740dab394b582
    https://github.com/rack/rack/commit/a227cd793778c7c3a827d32808058571569cda6f
    https://github.com/rack/rack/commit/e4c117749ba24a66f8ec5a08eddf68deeb425ccd
    https://github.com/rack/rack/security/advisories/GHSA-54rr-7fvw-6x8f
    https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-26146.yml
    https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html
    https://security.netapp.com/advisory/ntap-20240510-0006/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High