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    Gentoo: GLSA-202012-12: libass: User-assisted execution of arbitrary code

    Date 23 Dec 2020
    228
    Posted By LinuxSecurity Advisories
    A vulnerability has been found in libass that could allow a remote attacker to execute arbitrary code.
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    Gentoo Linux Security Advisory                           GLSA 202012-12
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                                                https://security.gentoo.org/
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      Severity: Normal
         Title: libass: User-assisted execution of arbitrary code
          Date: December 23, 2020
          Bugs: #746413
            ID: 202012-12
    
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    Synopsis
    ========
    
    A vulnerability has been found in libass that could allow a remote
    attacker to execute arbitrary code.
    
    Background
    ==========
    
    libass is a portable subtitle renderer for the ASS/SSA (Advanced
    Substation Alpha/Substation Alpha) subtitle format.
    
    Affected packages
    =================
    
         -------------------------------------------------------------------
          Package              /     Vulnerable     /            Unaffected
         -------------------------------------------------------------------
       1  media-libs/libass            < 0.15.0                  >= 0.15.0
    
    Description
    ===========
    
    It was discovered that libass did not properly handle Advanced
    Substation Alpha/Substation Alpha subtitle format files.
    
    Impact
    ======
    
    A remote attacker could entice a user to process an a specially crafted
    subtitle format file using an application linked against libass,
    possibly resulting in execution of arbitrary code with the privileges
    of the process or a Denial of Service condition.
    
    Workaround
    ==========
    
    There is no known workaround at this time.
    
    Resolution
    ==========
    
    All libass users should upgrade to the latest version:
    
       # emerge --sync
       # emerge --ask --oneshot --verbose ">=media-libs/libass-0.15.0"
    
    References
    ==========
    
    [ 1 ] CVE-2020-26682
           https://nvd.nist.gov/vuln/detail/CVE-2020-26682
    
    Availability
    ============
    
    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:
    
      https://security.gentoo.org/glsa/202012-12
    
    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 2020 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
    
    
    

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