DEBIAN-CVE-2025-61921

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    DEBIAN-CVE-2025-61921

    Published: 10 Oct 2025Last Modified: 1 Sept 2026
    Upstream:
    CVE-2025-61921

    Summary:

    Details: Sinatra is a domain-specific language for creating web applications in Ruby. In versions prior to 4.2.0, there is a denial of service vulnerability in the `If-Match` and `If-None-Match` header parsing component of Sinatra, if the `etag` method is used when constructing the response. Carefully crafted input can cause `If-Match` and `If-None-Match` header parsing in Sinatra to take an unexpected amount of time, possibly resulting in a denial of service attack vector. This header is typically involved in generating the `ETag` header value. Any applications that use the `etag` method when generating a response are impacted. Version 4.2.0 fixes the issue.

    References: https://security-tracker.debian.org/tracker/CVE-2025-61921

    Affected packages

    Package

    Name: ruby-sinatra

    Purl: pkg:deb/debian/ruby-sinatra?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.0.5-3+deb12u1

    Affected versions

    3.0.5-3

    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
    DEBIAN-CVE-2025-61921 | CVE-DB