CVE-2019-3877

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    CVE-2019-3877

    Published: 27 Mar 2019Last Modified: 8 Jul 2026

    Summary:

    Details: A vulnerability was found in mod_auth_mellon before v0.14.2. An open redirect in the logout URL allows requests with backslashes to pass through by assuming that it is a relative URL, while the browsers silently convert backslash characters into forward slashes treating them as an absolute URL. This mismatch allows an attacker to bypass the redirect URL validation logic in apr_uri_parse function.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/, https://access.redhat.com/errata/RHSA-2019:0766, https://access.redhat.com/errata/RHSA-2019:3421, https://usn.ubuntu.com/3924-1/, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3877, https://github.com/Uninett/mod_auth_mellon/commit/62041428a32de402e0be6ba45fe12df6a83bedb8, https://github.com/Uninett/mod_auth_mellon/issues/35

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -7d681177cb23253e1136afd18cb1916f3865554e

    Affected versions

    v0.14.1
    v0.14.0

    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