ArchLinux: 201911-4: python2: information disclosure

    Date04 Nov 2019
    CategoryArchLinux
    130
    Posted ByLinuxSecurity Advisories
    Archlinux Large
    The package python2 before version 2.7.17-1 is vulnerable to information disclosure.
    Arch Linux Security Advisory ASA-201911-4
    =========================================
    
    Severity: High
    Date    : 2019-11-03
    CVE-ID  : CVE-2019-9636
    Package : python2
    Type    : information disclosure
    Remote  : Yes
    Link    : https://security.archlinux.org/AVG-978
    
    Summary
    =======
    
    The package python2 before version 2.7.17-1 is vulnerable to
    information disclosure.
    
    Resolution
    ==========
    
    Upgrade to 2.7.17-1.
    
    # pacman -Syu "python2>=2.7.17-1"
    
    The problem has been fixed upstream in version 2.7.17.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by
    improper Handling of Unicode Encoding (with an incorrect netloc) during
    NFKC normalization. A specially crafted URL could be incorrectly parsed
    by urllib.parse.urlsplit and urllib.parse.urlparse to locate cookies or
    authentication data and send that information to a different host than
    when parsed correctly.
    
    Impact
    ======
    
    A remote attacker is able to craft a malicious URL and transfer private
    data to a different host than expected.
    
    References
    ==========
    
    https://python-security.readthedocs.io/vuln/urlsplit-nfkc-normalization.html
    https://github.com/python/cpython/commit/daad2c482c91de32d8305abbccc76a5de8b3a8be
    https://github.com/python/cpython/commit/f61599b050c621386a3fc6bc480359e2d3bb93de
    https://security.archlinux.org/CVE-2019-9636
    
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