ALAS-2017-877


Amazon Linux AMI Security Advisory: ALAS-2017-877
Advisory Release Date: 2017-08-31 23:00 Pacific
Severity: Medium

Issue Overview:

Unbounded stack allocation in catopen function
A stack based buffer overflow vulnerability was found in the catopen() function. An excessively long string passed to the function could cause it to crash or, potentially, execute arbitrary code.(CVE-2015-8779 )

Integer overflow in hcreate and hcreate_r
An integer overflow vulnerability was found in hcreate() and hcreate_r() functions which could result in an out-of-bounds memory access. This could lead to application crash or, potentially, arbitrary code execution. (CVE-2015-8778 )

Unbounded stack allocation in nan* functions
A stack overflow vulnerability was found in nan* functions that could cause applications, which process long strings with the nan function, to crash or, potentially, execute arbitrary code. (CVE-2014-9761 )

LD_POINTER_GUARD in the environment is not sanitized
It was found that the dynamic loader did not sanitize the LD_POINTER_GUARD environment variable. An attacker could use this flaw to bypass the pointer guarding protection on set-user-ID or set-group-ID programs to execute arbitrary code with the permissions of the user running the application.(CVE-2015-8777 )

Segmentation fault caused by passing out-of-range data to strftime()
It was found that out-of-range time values passed to the strftime() function could result in an out-of-bounds memory access. This could lead to application crash or, potentially, information disclosure. (CVE-2015-8776 )


Affected Packages:

glibc


Issue Correction:
Run yum update glibc to update your system.

New Packages:
i686:
    glibc-debuginfo-common-2.17-196.172.amzn1.i686
    glibc-devel-2.17-196.172.amzn1.i686
    glibc-utils-2.17-196.172.amzn1.i686
    glibc-headers-2.17-196.172.amzn1.i686
    glibc-2.17-196.172.amzn1.i686
    nscd-2.17-196.172.amzn1.i686
    glibc-static-2.17-196.172.amzn1.i686
    glibc-debuginfo-2.17-196.172.amzn1.i686
    glibc-common-2.17-196.172.amzn1.i686

src:
    glibc-2.17-196.172.amzn1.src

x86_64:
    glibc-devel-2.17-196.172.amzn1.x86_64
    nscd-2.17-196.172.amzn1.x86_64
    glibc-static-2.17-196.172.amzn1.x86_64
    glibc-common-2.17-196.172.amzn1.x86_64
    glibc-debuginfo-common-2.17-196.172.amzn1.x86_64
    glibc-utils-2.17-196.172.amzn1.x86_64
    glibc-debuginfo-2.17-196.172.amzn1.x86_64
    glibc-2.17-196.172.amzn1.x86_64
    glibc-headers-2.17-196.172.amzn1.x86_64