Debian Security Advisory
DLA-382-1 sudo -- LTS security update
- Date Reported:
- 11 Jan 2016
- Affected Packages:
- Security database references:
- In the Debian bugtracking system: Bug 804149.
In Mitre's CVE dictionary: CVE-2015-5602.
- More information:
When sudo is configured to allow a user to edit files under a directory that they can already write to without using sudo, they can actually edit (read and write) arbitrary files. Daniel Svartman reported that a configuration like this might be introduced unintentionally if the editable files are specified using wildcards, for example:
operator ALL=(root) sudoedit /home/*/*/test.txt
The default behaviour of sudo has been changed so that it does not allow editing of a file in a directory that the user can write to, or that is reached by following a symlink in a directory that the user can write to. These restrictions can be disabled, but this is strongly discouraged.
For the oldoldstable distribution (squeeze), this has been fixed in version 1.7.4p4-2.squeeze.6.
For the oldstable distribution (wheezy) and the stable distribution (jessie), this will be fixed soon.