Synopsis:          Moderate: glibc security, bug fix, and enhancement update

Advisory ID:       SLSA-2015:2199-7

Issue Date:        2015-11-19

CVE Numbers:       CVE-2013-7423

                   CVE-2015-1781

                   CVE-2015-1472

                   CVE-2015-1473

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It was discovered that, under certain circumstances, glibc's getaddrinfo()

function would send DNS queries to random file descriptors. An attacker

could potentially use this flaw to send DNS queries to unintended

recipients, resulting in information disclosure or data loss due to the

application encountering corrupted data. (CVE-2013-7423)



A buffer overflow flaw was found in the way glibc's gethostbyname_r() and

other related functions computed the size of a buffer when passed a

misaligned buffer as input. An attacker able to make an application call

any of these functions with a misaligned buffer could use this flaw to

crash the application or, potentially, execute arbitrary code with the

permissions of the user running the application. (CVE-2015-1781)



A heap-based buffer overflow flaw and a stack overflow flaw were found in

glibc's swscanf() function. An attacker able to make an application call

the swscanf() function could use these flaws to crash that application or,

potentially, execute arbitrary code with the permissions of the user

running the application. (CVE-2015-1472, CVE-2015-1473)



An integer overflow flaw, leading to a heap-based buffer overflow, was

found in glibc's _IO_wstr_overflow() function. An attacker able to make an

application call this function could use this flaw to crash that

application or, potentially, execute arbitrary code with the permissions

of the user running the application.



A flaw was found in the way glibc's fnmatch() function processed certain

malformed patterns. An attacker able to make an application call this

function could use this flaw to crash that application.

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SL7

  x86_64

    glibc-2.17-105.el7.i686.rpm

    glibc-2.17-105.el7.x86_64.rpm

    glibc-common-2.17-105.el7.x86_64.rpm

    glibc-debuginfo-2.17-105.el7.i686.rpm

    glibc-debuginfo-2.17-105.el7.x86_64.rpm

    glibc-debuginfo-common-2.17-105.el7.i686.rpm

    glibc-debuginfo-common-2.17-105.el7.x86_64.rpm

    glibc-devel-2.17-105.el7.i686.rpm

    glibc-devel-2.17-105.el7.x86_64.rpm

    glibc-headers-2.17-105.el7.x86_64.rpm

    glibc-utils-2.17-105.el7.x86_64.rpm

    nscd-2.17-105.el7.x86_64.rpm

    glibc-static-2.17-105.el7.i686.rpm

    glibc-static-2.17-105.el7.x86_64.rpm



- Scientific Linux Development Team