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Ubuntu 15.10: USN-2900-1 Critical glibc DoS via Crafted Traffic

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Calendar Grey February 16, 2016
Scroller Ubuntu
A vulnerability in the GNU C Library found in Ubuntu can cause system malfunctions or allow malicious actors to execute arbitrary code through specially crafted packets sent over the network.
GNU C Library could be made to crash or run programs if it received specially crafted network traffic.

Summary

GNU C Library could be made to crash or run programs if it received

specially crafted network traffic.

Software Description:

- glibc: GNU C Library

- eglibc: GNU C Library

Details:

It was discovered that the GNU C Library incorrectly handled receiving

responses while performing DNS resolution. A remote attacker could use this

issue to cause the GNU C Library to crash, resulting in a denial of

service, or possibly execute arbitrary code.

Topics%20covered

Topics Covered

security advisory critical DoS Ubuntu glibc network traffic

Update Instructions

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

Ubuntu 15.10:
  libc6                           2.21-0ubuntu4.1

Ubuntu 14.04 LTS:
  libc6                           2.19-0ubuntu6.7

Ubuntu 12.04 LTS:
  libc6                           2.15-0ubuntu10.13

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

References

https://ubuntu.com/security/notices/USN-2900-1

CVE-2015-7547

Severity
critical
Lowest
Low
Medium
High
Critical

February 16, 2016

Topics%20covered

Topics Covered

security advisory critical DoS Ubuntu glibc network traffic

Package Information

https://launchpad.net/ubuntu/+source/glibc/2.21-0ubuntu4.1
https://launchpad.net/ubuntu/+source/eglibc/2.19-0ubuntu6.7
https://launchpad.net/ubuntu/+source/eglibc/2.15-0ubuntu10.13

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