Rapid7 Vulnerability & Exploit Database

RHSA-2015:0863: glibc security and bug fix update

Back to Search

RHSA-2015:0863: glibc security and bug fix update

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
02/24/2015
Created
07/25/2018
Added
09/07/2015
Modified
07/04/2017

Description

The glibc packages provide the standard C libraries (libc), POSIX threadlibraries (libpthread), standard math libraries (libm), and the NameServer 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() andother related functions computed the size of a buffer when passed amisaligned buffer as input. An attacker able to make an application callany of these functions with a misaligned buffer could use this flaw tocrash the application or, potentially, execute arbitrary code with thepermissions 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 attackercould potentially use this flaw to send DNS queries to unintendedrecipients, resulting in information disclosure or data loss due to theapplication 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, whichcontain backported patches to correct these issues.

Solution(s)

  • redhat-upgrade-glibc
  • redhat-upgrade-glibc-common
  • redhat-upgrade-glibc-debuginfo
  • redhat-upgrade-glibc-debuginfo-common
  • redhat-upgrade-glibc-devel
  • redhat-upgrade-glibc-headers
  • redhat-upgrade-glibc-static
  • redhat-upgrade-glibc-utils
  • redhat-upgrade-nscd

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;