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Date: Tue, 26 Feb 2013 14:27:23 -0800
From: Seth Arnold <>
Subject: Re: CVE request: psi+ stores the cache file as

On Tue, Feb 26, 2013 at 11:04:24PM +0100, Agostino Sarubbo wrote:
> Psi+, a fork of psi, stores its files in ~/.cache/psi+ as world-readable.
> ~/.cache $ ls -la psi+/
> total 52
> drwxr-xr-x 5 ago ago  4096 feb 25 09:41 .
> drwx------ 5 ago ago  4096 feb 24 23:58 ..

It appears my ~/.cache and your ~/.cache are mode 0700. Directories
underneath are already unaccessible by other users, except if one of your
programs passes a filedescriptor to a directory to another user's process
(say, cwd is in ~/.cache/psi+ and then executes a setuid program, or
uses unix(7) SCM_RIGHTS to pass a directory file descriptor to another

Are there environments where ~/.cache isn't 0700 by default?


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