=========================================================================Ubuntu Security Notice USN-3276-1
May 05, 2017

shadow vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04
- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

su could be made to crash or stop programs as an administrator.

Software Description:
- shadow: system login tools

Details:

Sebastian Krahmer discovered integer overflows in shadow utilities.
A local attacker could possibly cause them to crash or potentially
gain privileges via crafted input. (CVE-2016-6252)

Tobias Stöckmann discovered a race condition in su. A local
attacker could cause su to send SIGKILL to other processes with
root privileges. (CVE-2017-2616)

Update instructions:

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

Ubuntu 17.04:
  login                           1:4.2-3.2ubuntu1.17.04.1
  passwd                          1:4.2-3.2ubuntu1.17.04.1
  uidmap                          1:4.2-3.2ubuntu1.17.04.1

Ubuntu 16.10:
  login                           1:4.2-3.2ubuntu1.16.10.1
  passwd                          1:4.2-3.2ubuntu1.16.10.1
  uidmap                          1:4.2-3.2ubuntu1.16.10.1

Ubuntu 16.04 LTS:
  login                           1:4.2-3.1ubuntu5.2
  passwd                          1:4.2-3.1ubuntu5.2
  uidmap                          1:4.2-3.1ubuntu5.2

Ubuntu 14.04 LTS:
  login                           1:4.1.5.1-1ubuntu9.4
  passwd                          1:4.1.5.1-1ubuntu9.4
  uidmap                          1:4.1.5.1-1ubuntu9.4

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-3276-1
  CVE-2016-6252, CVE-2017-2616

Package Information:
  https://launchpad.net/ubuntu/+source/shadow/1:4.2-3.2ubuntu1.17.04.1
  https://launchpad.net/ubuntu/+source/shadow/1:4.2-3.2ubuntu1.16.10.1
  https://launchpad.net/ubuntu/+source/shadow/1:4.2-3.1ubuntu5.2
  https://launchpad.net/ubuntu/+source/shadow/1:4.1.5.1-1ubuntu9.4

Ubuntu 3276-1: shadow vulnerabilities

May 5, 2017
su could be made to crash or stop programs as an administrator.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 17.04: login 1:4.2-3.2ubuntu1.17.04.1 passwd 1:4.2-3.2ubuntu1.17.04.1 uidmap 1:4.2-3.2ubuntu1.17.04.1 Ubuntu 16.10: login 1:4.2-3.2ubuntu1.16.10.1 passwd 1:4.2-3.2ubuntu1.16.10.1 uidmap 1:4.2-3.2ubuntu1.16.10.1 Ubuntu 16.04 LTS: login 1:4.2-3.1ubuntu5.2 passwd 1:4.2-3.1ubuntu5.2 uidmap 1:4.2-3.1ubuntu5.2 Ubuntu 14.04 LTS: login 1:4.1.5.1-1ubuntu9.4 passwd 1:4.1.5.1-1ubuntu9.4 uidmap 1:4.1.5.1-1ubuntu9.4 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-3276-1

CVE-2016-6252, CVE-2017-2616

Severity
May 05, 2017

Package Information

https://launchpad.net/ubuntu/+source/shadow/1:4.2-3.2ubuntu1.17.04.1 https://launchpad.net/ubuntu/+source/shadow/1:4.2-3.2ubuntu1.16.10.1 https://launchpad.net/ubuntu/+source/shadow/1:4.2-3.1ubuntu5.2 https://launchpad.net/ubuntu/+source/shadow/1:4.1.5.1-1ubuntu9.4

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