6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.123 Low
EPSS
Percentile
95.3%
CentOS Errata and Security Advisory CESA-2015:0863
The glibc packages provide the standard C libraries (libc), POSIX thread
libraries (libpthread), standard math libraries (libm), and the Name
Server Caching Daemon (nscd) used by multiple programs on the system.
Without these libraries, the Linux system cannot function correctly.
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)
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)
The CVE-2015-1781 issue was discovered by Arjun Shankar of Red Hat.
This update also fixes the following bug:
All glibc users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues.
Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2015-April/083243.html
Affected packages:
glibc
glibc-common
glibc-devel
glibc-headers
glibc-static
glibc-utils
nscd
Upstream details at:
https://access.redhat.com/errata/RHSA-2015:0863
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
CentOS | 6 | i686 | glibc | < 2.12-1.149.el6_6.7 | glibc-2.12-1.149.el6_6.7.i686.rpm |
CentOS | 6 | i686 | glibc-common | < 2.12-1.149.el6_6.7 | glibc-common-2.12-1.149.el6_6.7.i686.rpm |
CentOS | 6 | i686 | glibc-devel | < 2.12-1.149.el6_6.7 | glibc-devel-2.12-1.149.el6_6.7.i686.rpm |
CentOS | 6 | i686 | glibc-headers | < 2.12-1.149.el6_6.7 | glibc-headers-2.12-1.149.el6_6.7.i686.rpm |
CentOS | 6 | i686 | glibc-static | < 2.12-1.149.el6_6.7 | glibc-static-2.12-1.149.el6_6.7.i686.rpm |
CentOS | 6 | i686 | glibc-utils | < 2.12-1.149.el6_6.7 | glibc-utils-2.12-1.149.el6_6.7.i686.rpm |
CentOS | 6 | i686 | nscd | < 2.12-1.149.el6_6.7 | nscd-2.12-1.149.el6_6.7.i686.rpm |
CentOS | 6 | i686 | glibc | < 2.12-1.149.el6_6.7 | glibc-2.12-1.149.el6_6.7.i686.rpm |
CentOS | 6 | x86_64 | glibc | < 2.12-1.149.el6_6.7 | glibc-2.12-1.149.el6_6.7.x86_64.rpm |
CentOS | 6 | x86_64 | glibc-common | < 2.12-1.149.el6_6.7 | glibc-common-2.12-1.149.el6_6.7.x86_64.rpm |