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Ubuntu 16.04 LTS USN-3239-2 Critical: Glibc Regression Notification

ubuntu
Calendar Grey March 22, 2017
Dist Ubuntu Esm H88
Corrections for regressions and vulnerabilities in the GNU C Library across various Ubuntu releases, affecting system reliability.
USN-3239-1 introduced a regression in the GNU C Library.

Summary

USN-3239-1 introduced a regression in the GNU C Library.

Software Description:

- glibc: GNU C Library

- eglibc: GNU C Library

Details:

USN-3239-1 fixed vulnerabilities in the GNU C Library. Unfortunately,

the fix for CVE-2015-5180 introduced an internal ABI change within

the resolver library. This update reverts the change. We apologize

for the inconvenience.

Please note that long-running services that were restarted to compensate

for the USN-3239-1 update may need to be restarted again.

Original advisory details:

It was discovered that the GNU C Library incorrectly handled the

strxfrm() function. An attacker could use this issue to cause a denial

of service or possibly execute arbitrary code. This issue only affected

Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2015-8982)

It was discovered that an integer overflow existed in the

_IO_wstr_overflow() function of the GNU C Library. An attacker could

use this to cause a denial of service or poss...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu glibc ABI change

Update Instructions

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

Ubuntu 16.04 LTS:
  libc6                           2.23-0ubuntu7

Ubuntu 14.04 LTS:
  libc6                           2.19-0ubuntu6.11

Ubuntu 12.04 LTS:
  libc6                           2.15-0ubuntu10.17

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

References

https://ubuntu.com/security/notices/USN-3239-2

https://ubuntu.com/security/notices/USN-3239-1

https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1674532

Severity
critical
Lowest
Low
Medium
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Critical

March 21, 2017

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu glibc ABI change

Package Information

https://launchpad.net/ubuntu/+source/glibc/2.23-0ubuntu7
https://launchpad.net/ubuntu/+source/eglibc/2.19-0ubuntu6.11
https://launchpad.net/ubuntu/+source/eglibc/2.15-0ubuntu10.17

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