GHSA-vqqv-v9m2-48p2

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    GHSA-vqqv-v9m2-48p2

    Published: 4 Apr 2019Last Modified: 13 Mar 2026

    Summary: Bootstrap-sass contains code execution backdoor

    Details: Arbitrary code execution (via backdoor code) was discovered in bootstrap-sass 3.2.0.3, when downloaded from rubygems.org. An unauthenticated attacker can craft the ___cfduid cookie value with base64 arbitrary code to be executed via eval(), which can be leveraged to execute arbitrary code on the target system. Note that there are three underscore characters in the cookie name. This is unrelated to the __cfduid cookie that is legitimately used by Cloudflare.

    References: https://nvd.nist.gov/vuln/detail/CVE-2019-10842, https://github.com/twbs/bootstrap-sass/issues/1195, https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bootstrap-sass/CVE-2019-10842.yml, https://github.com/twbs/bootstrap-sass, https://snyk.io/blog/malicious-remote-code-execution-backdoor-discovered-in-the-popular-bootstrap-sass-ruby-gem, https://snyk.io/vuln/SNYK-RUBY-BOOTSTRAPSASS-174093

    Affected packages

    Package

    Name: bootstrap-sass

    Purl: pkg:gem/bootstrap-sass

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 3.2.0.3
    Fixed -3.2.0.4

    Affected versions

    3.2.0.3

    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