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Bug 1510883

Summary: slapd can not create and read links with slapd_tmp_t
Product: Red Hat Enterprise Linux 7 Reporter: Patrik Kis <pkis>
Component: selinux-policyAssignee: Lukas Vrabec <lvrabec>
Status: CLOSED ERRATA QA Contact: Milos Malik <mmalik>
Severity: high Docs Contact:
Priority: medium    
Version: 7.5CC: lmiksik, lvrabec, mgrepl, mhonek, mmalik, plautrba, ssekidde
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: selinux-policy-3.13.1-179.el7 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-04-10 12:46:03 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1400578    

Description Patrik Kis 2017-11-08 11:40:53 UTC 
Description of problem:
After adding a new feature to openldap where nss certs are converted to pem files, slapd need create and read links with slapd_tmp_t, but the policy prevents it.

Version-Release number of selected component (if applicable):
openldap-servers-2.4.44-9.el7
selinux-policy-3.13.1-166.el7

How reproducible:
always

Steps to Reproduce:
Comment 3 Milos Malik 2017-11-08 11:57:37 UTC 
----
type=PROCTITLE msg=audit(11/08/2017 12:56:22.981:102) : proctitle=/usr/sbin/slapd -u ldap -h ldapi:/// ldap:/// 
type=SYSCALL msg=audit(11/08/2017 12:56:22.981:102) : arch=x86_64 syscall=symlink success=no exit=EACCES(Permission denied) a0=0x55f87750434b a1=0x55f877518d40 a2=0x0 a3=0x7fecdf00c2d9 items=0 ppid=1 pid=21835 auid=unset uid=ldap gid=ldap euid=ldap suid=ldap fsuid=ldap egid=ldap sgid=ldap fsgid=ldap tty=(none) ses=unset comm=slapd exe=/usr/sbin/slapd subj=system_u:system_r:slapd_t:s0 key=(null) 
type=AVC msg=audit(11/08/2017 12:56:22.981:102) : avc:  denied  { create } for  pid=21835 comm=slapd name=ce275665.0 scontext=system_u:system_r:slapd_t:s0 tcontext=system_u:object_r:slapd_tmp_t:s0 tclass=lnk_file permissive=0 
----
Comment 4 Milos Malik 2017-11-08 12:05:36 UTC 
SELinux denial mentioned in comment#3 was caught in enforcing mode. Following SELinux denials appeared in permissive mode:
----
type=PROCTITLE msg=audit(11/08/2017 13:03:42.667:248) : proctitle=/usr/sbin/slapd -u ldap -h ldapi:/// ldap:/// 
type=PATH msg=audit(11/08/2017 13:03:42.667:248) : item=2 name=/tmp/certs--tlsmc-4FEAC3A966D2FF8BF5320A899F0CAD6CDB5A2A5716296E725516E4795F85B6E2/cacerts/ce275665.0 inode=26297909 dev=fd:03 mode=link,777 ouid=ldap ogid=ldap rdev=00:00 obj=system_u:object_r:slapd_tmp_t:s0 nametype=CREATE cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 
type=PATH msg=audit(11/08/2017 13:03:42.667:248) : item=1 name=/tmp/certs--tlsmc-4FEAC3A966D2FF8BF5320A899F0CAD6CDB5A2A5716296E725516E4795F85B6E2/cacerts/ inode=26221754 dev=fd:03 mode=dir,700 ouid=ldap ogid=ldap rdev=00:00 obj=system_u:object_r:slapd_tmp_t:s0 nametype=PARENT cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 
type=PATH msg=audit(11/08/2017 13:03:42.667:248) : item=0 name=cert0.pem nametype=UNKNOWN cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 
type=CWD msg=audit(11/08/2017 13:03:42.667:248) : cwd=/ 
type=SYSCALL msg=audit(11/08/2017 13:03:42.667:248) : arch=x86_64 syscall=symlink success=yes exit=0 a0=0x564d3a02dccb a1=0x564d3a69bdd0 a2=0x0 a3=0x7f09136a82d9 items=3 ppid=1 pid=18564 auid=unset uid=ldap gid=ldap euid=ldap suid=ldap fsuid=ldap egid=ldap sgid=ldap fsgid=ldap tty=(none) ses=unset comm=slapd exe=/usr/sbin/slapd subj=system_u:system_r:slapd_t:s0 key=(null) 
type=AVC msg=audit(11/08/2017 13:03:42.667:248) : avc:  denied  { create } for  pid=18564 comm=slapd name=ce275665.0 scontext=system_u:system_r:slapd_t:s0 tcontext=system_u:object_r:slapd_tmp_t:s0 tclass=lnk_file permissive=1 
----
type=PROCTITLE msg=audit(11/08/2017 13:03:42.717:249) : proctitle=/usr/sbin/slapd -u ldap -h ldapi:/// ldap:/// 
type=PATH msg=audit(11/08/2017 13:03:42.717:249) : item=0 name=/tmp/certs--tlsmc-4FEAC3A966D2FF8BF5320A899F0CAD6CDB5A2A5716296E725516E4795F85B6E2/cacerts/ce275665.0 inode=26297908 dev=fd:03 mode=file,400 ouid=ldap ogid=ldap rdev=00:00 obj=system_u:object_r:slapd_tmp_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 
type=CWD msg=audit(11/08/2017 13:03:42.717:249) : cwd=/ 
type=SYSCALL msg=audit(11/08/2017 13:03:42.717:249) : arch=x86_64 syscall=open success=yes exit=11 a0=0x7fffcc8e0e20 a1=O_RDONLY a2=0x1b6 a3=0x24 items=1 ppid=1 pid=18564 auid=unset uid=ldap gid=ldap euid=ldap suid=ldap fsuid=ldap egid=ldap sgid=ldap fsgid=ldap tty=(none) ses=unset comm=slapd exe=/usr/sbin/slapd subj=system_u:system_r:slapd_t:s0 key=(null) 
type=AVC msg=audit(11/08/2017 13:03:42.717:249) : avc:  denied  { read } for  pid=18564 comm=slapd name=ce275665.0 dev="vda3" ino=26297909 scontext=system_u:system_r:slapd_t:s0 tcontext=system_u:object_r:slapd_tmp_t:s0 tclass=lnk_file permissive=1 
----
Comment 13 errata-xmlrpc 2018-04-10 12:46:03 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0763