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    ArchLinux: 201901-1: tar: denial of service

    Date08 Jan 2019
    CategoryArchLinux
    296
    Posted ByLinuxSecurity Advisories
    The package tar before version 1.31-1 is vulnerable to denial of service.
    Arch Linux Security Advisory ASA-201901-1
    =========================================
    
    Severity: Low
    Date    : 2019-01-08
    CVE-ID  : CVE-2018-20482
    Package : tar
    Type    : denial of service
    Remote  : No
    Link    : https://security.archlinux.org/AVG-841
    
    Summary
    =======
    
    The package tar before version 1.31-1 is vulnerable to denial of
    service.
    
    Resolution
    ==========
    
    Upgrade to 1.31-1.
    
    # pacman -Syu "tar>=1.31-1"
    
    The problem has been fixed upstream in version 1.31.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    A denial of service issue has been found in GNU Tar versions up to and
    including 1.30. When creating archives with the --sparse option, tar
    would loop endlessly if a sparse file had been truncated while being
    archived.
    
    Impact
    ======
    
    An attacker might be able to cause a denial of service via an archive
    created with the --sparse option.
    
    References
    ==========
    
    https://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html
    https://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42c
    https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug
    https://security.archlinux.org/CVE-2018-20482
    

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