Scientific Linux Security Update : glibc on SL6.x i386/x86_64

Critical Nessus Plugin ID 88797


The remote Scientific Linux host is missing one or more security updates.


A stack-based buffer overflow was found in the way the libresolv library performed dual A/AAAA DNS queries. A remote attacker could create a specially crafted DNS response which could cause libresolv to crash or, potentially, execute code with the permissions of the user running the library. Note: this issue is only exposed when libresolv is called from the nss_dns NSS service module. (CVE-2015-7547)

This update also fixes the following bugs :

- The dynamic loader has been enhanced to allow the loading of more shared libraries that make use of static thread local storage. While static thread local storage is the fastest access mechanism it may also prevent the shared library from being loaded at all since the static storage space is a limited and shared process-global resource. Applications which would previously fail with 'dlopen: cannot load any more object with static TLS' should now start up correctly.

- A bug in the POSIX realtime support would cause asynchronous I/O or certain timer API calls to fail and return errors in the presence of large thread-local storage data that exceeded PTHREAD_STACK_MIN in size (generally 16 KiB). The bug in librt has been corrected and the impacted APIs no longer return errors when large thread-local storage data is present in the application.


Update the affected packages.

See Also

Plugin Details

Severity: Critical

ID: 88797

File Name: sl_20160216_glibc_on_SL6_x.nasl

Version: $Revision: 2.10 $

Type: local

Agent: unix

Published: 2016/02/17

Modified: 2017/01/27

Dependencies: 12634

Risk Information

Risk Factor: Critical


Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C


Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 2016/02/16

Reference Information

CVE: CVE-2015-7547

TRA: TRA-2017-08

IAVA: 2016-A-0053