Bug#574832: [security] possible symlink attack against /tmp/ddclient.cache

2010-03-22 Thread Torsten Landschoff
On Sun, Mar 21, 2010 at 09:45:02PM +0100, Nico Golde wrote: Also, I'm watching syslog quite a lot and I noticed this line at boot: | Mar 21 19:56:39 r2 ddclient[3135]: WARNING: file /tmp/ddclient.cache, line 3: Invalid Value for keyword 'ip' = '' Hmm ok, this is strange. When I wrote

Bug#574832: [security] possible symlink attack against /tmp/ddclient.cache

2010-03-21 Thread Teodor
Package: ddclient Version: 3.8.0-10 Severity: grave Tags: security Justification: user security hole Hi, A local user could perform a symlink attack against /tmp/ddclient.cache file. I see two solutions for this problem: 1) use /var/run/ddclient.cache as the cache file (only root has access

Bug#574832: [security] possible symlink attack against /tmp/ddclient.cache

2010-03-21 Thread Nico Golde
Hey, * Teodor mteo...@gmail.com [2010-03-21 16:49]: A local user could perform a symlink attack against /tmp/ddclient.cache file. I see two solutions for this problem: 1) use /var/run/ddclient.cache as the cache file (only root has access here) 2) use `mktemp' to create a non-predictable

Bug#574832: [security] possible symlink attack against /tmp/ddclient.cache

2010-03-21 Thread Teodor MICU
Hi, On Sun, Mar 21, 2010 at 6:43 PM, Nico Golde n...@debian.org wrote: From what I see it is using /var/cache/ddclient/ddclient.cache. Can you elaborate why you think it's using /tmp/? It doesn't apper to be using that directory. This is what I have on my laptop: | d...@r2:~$ ls -l

Bug#574832: [security] possible symlink attack against /tmp/ddclient.cache

2010-03-21 Thread Nico Golde
Hey, * Teodor MICU mteo...@gmail.com [2010-03-21 19:23]: On Sun, Mar 21, 2010 at 6:43 PM, Nico Golde n...@debian.org wrote: From what I see it is using /var/cache/ddclient/ddclient.cache. Can you elaborate why you think it's using /tmp/? It doesn't apper to be using that directory. This is