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AUSCERT External Security Bulletin Redistribution
ESB-2017.1144.3
shadow vulnerabilities
16 November 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: shadow utilities
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-2616 CVE-2016-6252
Reference: ESB-2017.0955
ESB-2017.0751
ESB-2017.0523
ESB-2017.0512
Original Bulletin:
http://www.ubuntu.com/usn/usn-3276-1
Revision History: November 16 2017: Update for Ubuntu 12.04 ESM.
May 17 2017: USN-3276-1 introduced a regression in su.
May 8 2017: Initial Release
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USN-3276-3: shadow vulnerability
Ubuntu Security Notice USN-3276-3
14th November, 2017
shadow vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
Ubuntu 12.04 LTS
Summary
su could be made to crash or stop programs as an administrator.
Software description
shadow - system login tools
Details
USN-3276-1 and USN-3276-2 fixed vulnerabilities in shadow. This update
provides the corresponding update for Ubuntu 12.04 ESM.
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)
Update instructions
The problem can be corrected by updating your system to the following package version:
Ubuntu 12.04 LTS:
passwd 1:4.1.4.2+svn3283-3ubuntu5.2
login 1:4.1.4.2+svn3283-3ubuntu5.2
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
CVE-2017-26166-1
CVE-2017-2616
==========================================================================
Ubuntu Security Notice USN-3276-2
May 17, 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
Summary:
USN-3276-1 introduced a regression in su.
Software Description:
- - shadow: system login tools
Details:
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 versions:
Ubuntu 17.04:
login 1:4.2-3.2ubuntu1.17.04.2
passwd 1:4.2-3.2ubuntu1.17.04.2
uidmap 1:4.2-3.2ubuntu1.17.04.2
Ubuntu 16.10:
login 1:4.2-3.2ubuntu1.16.10.2
passwd 1:4.2-3.2ubuntu1.16.10.2
uidmap 1:4.2-3.2ubuntu1.16.10.2
Ubuntu 16.04 LTS:
login 1:4.2-3.1ubuntu5.3
passwd 1:4.2-3.1ubuntu5.3
uidmap 1:4.2-3.1ubuntu5.3
Ubuntu 14.04 LTS:
login 1:4.1.5.1-1ubuntu9.5
passwd 1:4.1.5.1-1ubuntu9.5
uidmap 1:4.1.5.1-1ubuntu9.5
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-3276-2
http://www.ubuntu.com/usn/usn-3276-1
https://launchpad.net/bugs/1690820
Package Information:
https://launchpad.net/ubuntu/+source/shadow/1:4.2-3.2ubuntu1.17.04.2
https://launchpad.net/ubuntu/+source/shadow/1:4.2-3.2ubuntu1.16.10.2
https://launchpad.net/ubuntu/+source/shadow/1:4.2-3.1ubuntu5.3
https://launchpad.net/ubuntu/+source/shadow/1:4.1.5.1-1ubuntu9.5
==============================================================================
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 St=F6ckmann 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:
http://www.ubuntu.com/usn/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
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