httpd mod_auth_pam winbind

[Vadym Chepkov]

--- On Mon, 4/5/10, Daniel J Walsh <dwalsh at redhat.com> wrote:

> From: Daniel J Walsh <dwalsh at redhat.com>
> Subject: Re: httpd mod_auth_pam winbind
> To: "Vadym Chepkov" <chepkov at yahoo.com>
> Cc: selinux at lists.fedoraproject.org
> Date: Monday, April 5, 2010, 8:11 AM
> On 04/02/2010 12:58 PM, Vadym Chepkov
> wrote:
> > --- On Fri, 4/2/10, Daniel J Walsh<dwalsh at redhat.com> 
> wrote:
> >
> >    
> >> From: Daniel J Walsh<dwalsh at redhat.com>
> >> Subject: Re: httpd mod_auth_pam winbind
> >> To: "Vadym Chepkov"<chepkov at yahoo.com>
> >> Cc: selinux at lists.fedoraproject.org
> >> Date: Friday, April 2, 2010, 11:33 AM
> >> On 04/02/2010 12:38 AM, Vadym Chepkov
> >> wrote:
> >>      
> >>> Hi,
> >>>
> >>> I have
> selinux-policy-targeted-2.4.6-255.el5_4.4
> >>>
> >>> allow_httpd_mod_auth_pam
> -->   on
> >>> httpd_can_network_connect
> -->   on
> >>>
> >>> httpd with mod_auth_pam via winbind
> >>>
> >>> get the following avc when in "permissive"
> mode
> >>>
> >>>
> >>> type=SYSCALL msg=audit(1270181973.950:37):
> >>>        
> >> arch=c000003e syscall=41 success=yes exit=19 a0=10
> a1=3 a2=9
> >> a3=0 items=0 ppid=2032 pid=2039 auid=4294967295
> uid=48
> >> gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48
> fsgid=48
> >> tty=(none) ses=4294967295 comm="httpd"
> exe="/usr/sbin/httpd"
> >> subj=user_u:system_r:httpd_t:s0 key=(null)
> >>      
> >>> type=AVC msg=audit(1270181973.950:37): avc:
> >>>        
> >> denied  { create } for  pid=2039
> comm="httpd"
> >> scontext=user_u:system_r:httpd_t:s0
> >> tcontext=user_u:system_r:httpd_t:s0
> >> tclass=netlink_audit_socket
> >>      
> >>> type=SYSCALL msg=audit(1270181973.950:38):
> >>>        
> >> arch=c000003e syscall=44 success=yes exit=124
> a0=13
> >> a1=7fff640fa9c0 a2=7c a3=0 items=0 ppid=2032
> pid=2039
> >> auid=4294967295 uid=48 gid=48 euid=48 suid=48
> fsuid=48
> >> egid=48 sgid=48 fsgid=48 tty=(none)
> ses=4294967295
> >> comm="httpd" exe="/usr/sbin/httpd"
> >> subj=user_u:system_r:httpd_t:s0 key=(null)
> >>      
> >>> type=AVC msg=audit(1270181973.950:38): avc:
> >>>        
> >> denied  { nlmsg_relay } for  pid=2039
> comm="httpd"
> >> scontext=user_u:system_r:httpd_t:s0
> >> tcontext=user_u:system_r:httpd_t:s0
> >> tclass=netlink_audit_socket
> >>      
> >>> type=AVC msg=audit(1270181973.950:38): avc:
> >>>        
> >> denied  { write } for  pid=2039
> comm="httpd"
> >> scontext=user_u:system_r:httpd_t:s0
> >> tcontext=user_u:system_r:httpd_t:s0
> >> tclass=netlink_audit_socket
> >>      
> >>> type=SYSCALL msg=audit(1270181973.950:39):
> >>>        
> >> arch=c000003e syscall=45 success=yes exit=36
> a0=13
> >> a1=7fff640f8690 a2=231c a3=42 items=0 ppid=2032
> pid=2039
> >> auid=4294967295 uid=48 gid=48 euid=48 suid=48
> fsuid=48
> >> egid=48 sgid=48 fsgid=48 tty=(none)
> ses=4294967295
> >> comm="httpd" exe="/usr/sbin/httpd"
> >> subj=user_u:system_r:httpd_t:s0 key=(null)
> >>      
> >>> type=AVC msg=audit(1270181973.950:39): avc:
> >>>        
> >> denied  { read } for  pid=2039
> comm="httpd"
> >> scontext=user_u:system_r:httpd_t:s0
> >> tcontext=user_u:system_r:httpd_t:s0
> >> tclass=netlink_audit_socket
> >>      
> >>> audit2allow suggests simple:
> >>> allow httpd_t self:netlink_audit_socket {
> nlmsg_relay
> >>>        
> >> write create read };
> >>      
> >>> Is something missing in the policy or I missed
> some
> >>>        
> >> other boolean?
> >>      
> >>>
> >>>        
> >> No this could be considered a bug.  Basically
> pam is
> >> trying to send an
> >> audit message to the audit.log.
> >>
> >> YOu can add this access,  it would allow the
> appache
> >> process to attempt
> >> to send audit messages.  Since the httpd is
> running as
> >> non root, it
> >> might not have the capabilities necessary to send
> them
> >>
> >> Open a bug report on this, since we probably
> should
> >> dontaudit these
> >> calls if the boolean to allow pam is turned on.
> >>      
> > dontaudit wouldn't work, apache denies access in
> enforcing mode.
> >
> > Bug 579105 Submitted
> >
> > Thank you,
> >     
> > Sincerely yours,
> >    Vadym Chepkov
> >
> >
> > --
> > selinux mailing list
> > selinux at lists.fedoraproject.org
> > https://admin.fedoraproject.org/mailman/listinfo/selinux
> >    
> Vadym, Please open a bug on RHEL5 to add this
> functionality.  I will add 
> it to RHEL6, now

Dan,

I did open BZ 579105 on RHEL5. By the way is RHEL6 can be downloaded as a beta, perhaps already? I don't see it on RHN, only RHEL5.5-beta

Thanks,
Vadym