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    ArchLinux: 201410-14: wget: arbitrary filesystem access

    Date 29 Oct 2014
    277
    Posted By LinuxSecurity Advisories
    The package wget before version 1.16-2 is vulnerable to arbitrary filesystem access.
    Arch Linux Security Advisory ASA-201410-14
    ==========================================
    
    Severity: Medium
    Date    : 2014-10-29
    CVE-ID  : CVE-2014-4877
    Package : wget
    Type    : arbitrary filesystem access
    Remote  : Yes
    Link    : https://wiki.archlinux.org/index.php/CVE-2014
    
    Summary
    =======
    
    The package wget before version 1.16-2 is vulnerable to arbitrary
    filesystem access.
    
    Resolution
    ==========
    
    Upgrade to 1.16-2.
    
    # pacman -Syu "wget>=1.16-2"
    
    The problem has been fixed upstream in version 1.16.
    
    Workaround
    ==========
    
    Do not use the --retr-symlinks=yes option when recursively retrieving a
    directory from an untrusted FTP server or over an untrusted connection.
    
    Description
    ===========
    
    It was found that wget was susceptible to a symlink attack which could
    create arbitrary files, directories or symbolic links and set their
    permissions when retrieving a directory recursively through FTP.
    
    By default, when retrieving ftp directories recursively and a symbolic
    link is encountered, the symbolic link is traversed and the pointed-to
    files are retrieved. This option poses a security risk where a malicious
    FTP Server may cause Wget to write to files outside of the intended
    directories through a specially crafted .listing file.
    
    Impact
    ======
    
    A malicious FTP server or a malicious attacker in position of
    man-in-the-middle could create arbitrary files, directories or symbolic
    links and set their permissions when retrieving a directory recursively
    through FTP.
    
    References
    ==========
    
    https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-4877
    https://bugzilla.redhat.com/show_bug.cgi?id=1139181
    https://seclists.org/oss-sec/2014/q4/453
    
    

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