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Ubuntu 15.10 USN-2985-1 Critical: Glibc Buffer Overflow Issues

ubuntu
Calendar Grey May 25, 2016
Scroller Ubuntu
A number of security flaws were addressed in the GNU C Library to reduce potential threats and prevent denial of service incidents.
Several security issues were fixed in the GNU C Library.

Summary

Several security issues were fixed in the GNU C Library.

Software Description:

- glibc: GNU C Library

- eglibc: GNU C Library

Details:

Martin Carpenter discovered that pt_chown in the GNU C Library did not

properly check permissions for tty files. A local attacker could use this

to gain administrative privileges or expose sensitive information.

(CVE-2013-2207, CVE-2016-2856)

Robin Hack discovered that the Name Service Switch (NSS) implementation in

the GNU C Library did not properly manage its file descriptors. An attacker

could use this to cause a denial of service (infinite loop).

(CVE-2014-8121)

Joseph Myers discovered that the GNU C Library did not properly handle long

arguments to functions returning a representation of Not a Number (NaN). An

attacker could use this to cause a denial of service (stack exhaustion

leading to an application crash) or possibly execute arbitrary code.

(CVE-2014-9761)

Arjun Shankar discovered that in certain situations...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow critical remote code execution Ubuntu GNU C Library

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 15.10:
  libc6                           2.21-0ubuntu4.2
  libc6-dev                       2.21-0ubuntu4.2

Ubuntu 14.04 LTS:
  libc6                           2.19-0ubuntu6.8
  libc6-dev                       2.19-0ubuntu6.8

Ubuntu 12.04 LTS:
  libc6                           2.15-0ubuntu10.14
  libc6-dev                       2.15-0ubuntu10.14

After a standard system update you need to reboot your computer to
make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-2985-1

CVE-2013-2207, CVE-2014-8121, CVE-2014-9761, CVE-2015-1781,

CVE-2015-5277, CVE-2015-8776, CVE-2015-8777, CVE-2015-8778,

CVE-2015-8779, CVE-2016-2856, CVE-2016-3075

Severity
critical
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Critical

May 25, 2016

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow critical remote code execution Ubuntu GNU C Library

Package Information

https://launchpad.net/ubuntu/+source/glibc/2.21-0ubuntu4.2
https://launchpad.net/ubuntu/+source/eglibc/2.19-0ubuntu6.8
https://launchpad.net/ubuntu/+source/eglibc/2.15-0ubuntu10.14

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