Ubuntu Security Notice USN-3276-2
16th May, 2017
shadow regression
A security issue affects these releases of Ubuntu and its derivatives:
USN-3276-1 introduced a regression in su.
Software description
USN-3276-1 intended to fix a vulnerability in su. The solution introduced
a regression in su signal handling. This update modifies the security fix.
We apologize for the inconvenience.
Original advisory 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 version:
Ubuntu 17.04:
passwd 1:4.2-3.2ubuntu1.17.04.2
login 1:4.2-3.2ubuntu1.17.04.2
uidmap 1:4.2-3.2ubuntu1.17.04.2
Ubuntu 16.10:
passwd 1:4.2-3.2ubuntu1.16.10.2
login 1:4.2-3.2ubuntu1.16.10.2
uidmap 1:4.2-3.2ubuntu1.16.10.2
Ubuntu 16.04 LTS:
passwd 1:4.2-3.1ubuntu5.3
login 1:4.2-3.1ubuntu5.3
uidmap 1:4.2-3.1ubuntu5.3
Ubuntu 14.04 LTS:
passwd 1:4.1.5.1-1ubuntu9.5
login 1:4.1.5.1-1ubuntu9.5
uidmap 1:4.1.5.1-1ubuntu9.5
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
LP: 1690820
Continue reading...
16th May, 2017
shadow regression
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
USN-3276-1 introduced a regression in su.
Software description
- shadow - system login tools
USN-3276-1 intended to fix a vulnerability in su. The solution introduced
a regression in su signal handling. This update modifies the security fix.
We apologize for the inconvenience.
Original advisory 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 version:
Ubuntu 17.04:
passwd 1:4.2-3.2ubuntu1.17.04.2
login 1:4.2-3.2ubuntu1.17.04.2
uidmap 1:4.2-3.2ubuntu1.17.04.2
Ubuntu 16.10:
passwd 1:4.2-3.2ubuntu1.16.10.2
login 1:4.2-3.2ubuntu1.16.10.2
uidmap 1:4.2-3.2ubuntu1.16.10.2
Ubuntu 16.04 LTS:
passwd 1:4.2-3.1ubuntu5.3
login 1:4.2-3.1ubuntu5.3
uidmap 1:4.2-3.1ubuntu5.3
Ubuntu 14.04 LTS:
passwd 1:4.1.5.1-1ubuntu9.5
login 1:4.1.5.1-1ubuntu9.5
uidmap 1:4.1.5.1-1ubuntu9.5
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
LP: 1690820
Continue reading...