Two constraint violations

Two constraint violations

[Alan Rouse]

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1.  When I boot to a desktop as user_t, then open a terminal, and execute 'su' to login as root, a file is created in the /root directory called .xauth0SiF7t.  That produces the following AVC:

type=AVC msg=audit(1274122005.740:4): avc: denied { create } for pid=4410 comm="su" name=".xauth0SiF7t" scontext=user_u:user_r:user_su_t:s0 tcontext=system_u:object_r:default_t:s0 tclass=file

Audit2allow generates the an allow rule but tells me it is a constraint violation.

allow user_su_t default_t:file create;

Any insights into why this is happening / what I should do to fix it?

2.  Note, I'm still also getting this AVC during system boot, for which audit2allow also generates a rule which is a constraint violation:

type=AVC msg=audit(1274121983.953:3): avc: denied { relablefrom } for pid=4335 comm="restorecond" name=".xsession-errors" dev=sda3 ino=127759 scontext=user_u:user_r:user_t:s0 tcontext=system_u:object_r:xauth_home_t:s0 tclass=file

Any insights into why this is happening / what I should do to fix it?






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Re: Two constraint violations

[Daniel J Walsh]

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On 05/17/2010 03:11 PM, Alan Rouse wrote:
> 1.  When I boot to a desktop as user_t, then open a terminal, and execute 'su' to login as root, a file is created in the /root directory called .xauth0SiF7t.  That produces the following AVC:
> 
> type=AVC msg=audit(1274122005.740:4): avc: denied { create } for pid=4410 comm="su" name=".xauth0SiF7t" scontext=user_u:user_r:user_su_t:s0 tcontext=system_u:object_r:default_t:s0 tclass=file
> 
> Audit2allow generates the an allow rule but tells me it is a constraint violation.
> 
> allow user_su_t default_t:file create;
> 
> Any insights into why this is happening / what I should do to fix it?
> 
> 2.  Note, I'm still also getting this AVC during system boot, for which audit2allow also generates a rule which is a constraint violation:
> 
> type=AVC msg=audit(1274121983.953:3): avc: denied { relablefrom } for pid=4335 comm="restorecond" name=".xsession-errors" dev=sda3 ino=127759 scontext=user_u:user_r:user_t:s0 tcontext=system_u:object_r:xauth_home_t:s0 tclass=file
> 
> Any insights into why this is happening / what I should do to fix it?
> 
> 
> 
> 
> 
> 
/root is mislabeled.  It should not be default_t.

Also user_t should probably not be allowed to run su.  Since it is a non
admin user.

In Fedora Policy, staff_t and user_t can not run su.  They need to use
sudo.
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