Debian: DSA-3481-1: glibc security update

    Date16 Feb 2016
    CategoryDebian
    105
    Posted ByLinuxSecurity Advisories
    Several vulnerabilities have been fixed in the GNU C Library, glibc. The first vulnerability listed below is considered to have critical impact.
    
    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-3481-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                           Florian Weimer
    February 16, 2016                     https://www.debian.org/security/faq
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    Package        : glibc
    CVE ID         : CVE-2015-7547 CVE-2015-8776 CVE-2015-8778 CVE-2015-8779
    Debian Bug     : 812441 812445 812455
    
    Several vulnerabilities have been fixed in the GNU C Library, glibc.                              
    
    The first vulnerability listed below is considered to have critical
    impact.
    
    CVE-2015-7547
    
        The Google Security Team and Red Hat discovered that the glibc
        host name resolver function, getaddrinfo, when processing
        AF_UNSPEC queries (for dual A/AAAA lookups), could mismanage its
        internal buffers, leading to a stack-based buffer overflow and
        arbitrary code execution.  This vulnerability affects most
        applications which perform host name resolution using getaddrinfo,
        including system services.
    
    CVE-2015-8776
    
        Adam Nielsen discovered that if an invalid separated time value
        is passed to strftime, the strftime function could crash or leak
        information.  Applications normally pass only valid time
        information to strftime; no affected applications are known.
    
    CVE-2015-8778
    
        Szabolcs Nagy reported that the rarely-used hcreate and hcreate_r
        functions did not check the size argument properly, leading to a
        crash (denial of service) for certain arguments.  No impacted
        applications are known at this time.
    
    CVE-2015-8779
    
        The catopen function contains several unbound stack allocations
        (stack overflows), causing it the crash the process (denial of
        service).  No applications where this issue has a security impact
        are currently known.
    
    While it is only necessary to ensure that all processes are not using
    the old glibc anymore, it is recommended to reboot the machines after
    applying the security upgrade.
    
    For the stable distribution (jessie), these problems have been fixed in
    version 2.19-18+deb8u3.
    
    For the unstable distribution (sid), these problems will be fixed in
    version 2.21-8.
    
    We recommend that you upgrade your glibc 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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