• rack-cors vulnerability

    From boo_ubuntu@21:4/110 to Ubuntu Users on Tue Oct 6 00:10:04 2020
    ruby-rack-cors vulnerability

    A security issue affects these releases of Ubuntu and its
    derivatives:

    * Ubuntu 16.04 LTS

    Summary

    rack-cors would allow unintended access to files over the network.

    Software Description

    * ruby-rack-cors - provides support for Cross-Origin Resource
    Sharing (CORS) for Rack compatible web applications

    Details

    It was discovered that rack-cors did not properly handle relative
    file paths. An attacker could use this vulnerability to access
    arbitrary files.

    Update instructions

    The problem can be corrected by updating your system to the
    following package versions:

    Ubuntu 16.04 LTS
    ruby-rack-cors - 0.4.0-1+deb9u2build0.16.04.1

    To update your system, please follow these instructions:
    https://wiki.ubuntu.com/Security/Upgrades.

    In general, a standard system update will make all the necessary
    changes.

    References

    * CVE-2019-18978

    --- Mystic BBS v1.12 A46 (Linux/64)
    * Origin: BZ&BZ BBS (21:4/110)