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Debian Security Advisory DSA 3871-1 (zookeeper - security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
It was discovered that Zookeeper, a service for maintaining configuration information, didn't restrict access to the computationally expensive wchp/wchc commands which could result in denial of service by elevated CPU consumption. This update disables those two commands by default. The new configuration option 4lw.commands.whitelist can be used to whitelist commands selectively (and the full set of commands can be restored with '*')
Affected Software
Affected Software
zookeeper on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
For the stable distribution (jessie), this problem has been fixed in version 3.4.5+dfsg-2+deb8u2. For the unstable distribution (sid), this problem will be fixed soon. We recommend that you upgrade your zookeeper packages.