Debian: DSA-3886-2: linux regression update

    Date27 Jun 2017
    CategoryDebian
    33
    Posted ByLinuxSecurity Advisories
    The security update announced as DSA-3886-1 caused regressions for some applications using Java - including jsvc, LibreOffice and Scilab - due to the fix for CVE-2017-1000364. Updated packages are now available to correct this issue. For reference, the relevant part of the original
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-3886-2                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                     Salvatore Bonaccorso
    June 27, 2017                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------
    
    Package        : linux
    Debian Bug     : 865303
    
    The security update announced as DSA-3886-1 caused regressions for some
    applications using Java - including jsvc, LibreOffice and Scilab - due
    to the fix for CVE-2017-1000364. Updated packages are now available to
    correct this issue. For reference, the relevant part of the original
    advisory text follows.
    
    CVE-2017-1000364
    
        The Qualys Research Labs discovered that the size of the stack guard
        page is not sufficiently large. The stack-pointer can jump over the
        guard-page and moving from the stack into another memory region
        without accessing the guard-page. In this case no page-fault
        exception is raised and the stack extends into the other memory
        region. An attacker can exploit this flaw for privilege escalation.
    
        The default stack gap protection is set to 256 pages and can be
        configured via the stack_guard_gap kernel parameter on the kernel
        command line.
    
        Further details can be found at
        https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
    
    For the oldstable distribution (jessie), this problem has been fixed
    in version 3.16.43-2+deb8u2.
    
    For the stable distribution (stretch), this problem has been fixed in
    version 4.9.30-2+deb9u2.
    
    We recommend that you upgrade your linux packages.
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/
    
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    
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