Gentoo: GLSA-201903-05: Tar: Denial of Service

    Date10 Mar 2019
    CategoryGentoo
    549
    Posted ByLinuxSecurity Advisories
    A vulnerability in Tar could led to a Denial of Service condition.
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    Gentoo Linux Security Advisory                           GLSA 201903-05
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                                               https://security.gentoo.org/
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     Severity: Normal
        Title: Tar: Denial of Service
         Date: March 10, 2019
         Bugs: #674210
           ID: 201903-05
    
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    Synopsis
    ========
    
    A vulnerability in Tar could led to a Denial of Service condition.
    
    Background
    ==========
    
    The Tar program provides the ability to create and manipulate tar
    archives.
    
    Affected packages
    =================
    
        -------------------------------------------------------------------
         Package              /     Vulnerable     /            Unaffected
        -------------------------------------------------------------------
      1  app-arch/tar                < 1.30-r1                 >= 1.30-r1 
    
    Description
    ===========
    
    The sparse_dump_region function in sparse.c file in Tar allows an
    infinite loop using the --sparse option.
    
    Impact
    ======
    
    A local attacker could cause a Denial of Service condition by modifying
    a file that is supposed to be archived by a different user's process
    (e.g., a system backup running as root).
    
    Workaround
    ==========
    
    There is no known workaround at this time.
    
    Resolution
    ==========
    
    All Tar users should upgrade to the latest version:
    
      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-arch/tar-1.30-r1"
    
    References
    ==========
    
    [ 1 ] CVE-2018-20482
          https://nvd.nist.gov/vuln/detail/CVE-2018-20482
    
    Availability
    ============
    
    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:
    
     https://security.gentoo.org/glsa/201903-05
    
    Concerns?
    =========
    
    Security is a primary focus of Gentoo Linux and ensuring the
    confidentiality and security of our users' machines is of utmost
    importance to us. Any security concerns should be addressed to
    This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at
    https://bugs.gentoo.org.
    
    License
    =======
    
    Copyright 2019 Gentoo Foundation, Inc; referenced text
    belongs to its owner(s).
    
    The contents of this document are licensed under the
    Creative Commons - Attribution / Share Alike license.
    
    https://creativecommons.org/licenses/by-sa/2.5
    
    You are not authorised to post comments.

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