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Bug 1105033 - libfreebl3.so runs prelink during the initialization phase
Summary: libfreebl3.so runs prelink during the initialization phase
Keywords:
Status: CLOSED DUPLICATE of bug 1103674
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: nss-softokn
Version: 6.6
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Elio Maldonado Batiz
QA Contact: BaseOS QE Security Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-06-05 09:17 UTC by Milos Malik
Modified: 2015-09-10 22:53 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 1153602 (view as bug list)
Environment:
Last Closed: 2014-06-11 18:09:54 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 1262003 0 unspecified CLOSED [selinux][rhel-6.7] /bin/sh: Permission denied 2021-02-22 00:41:40 UTC

Internal Links: 1262003

Description Milos Malik 2014-06-05 09:17:10 UTC 
Description of problem:
 * libfreebl3.so runs prelink during the initialization phase -> each program which needs this library automatically runs prelink
 * libfreebl3.so calls fchown() on the pipe, where the prelink process sends its output

Version-Release number of selected component (if applicable):
nss-softokn-freebl-3.14.3-13.el6

How reproducible:
always

Steps to Reproduce:
# get a RHEL-6.6 machine where prelink package is installed
# setenforce 1
# service crond restart
# ausearch -m avc -m user_avc -m selinux_err -i

Actual results:
----
type=PATH msg=audit(06/05/2014 06:02:35.735:31600) : item=0 name=(null) inode=128576 dev=00:08 mode=fifo,600 ouid=root ogid=root rdev=00:00 obj=unconfined_u:system_r:crond_t:s0-s0:c0.c1023 nametype=NORMAL 
type=SYSCALL msg=audit(06/05/2014 06:02:35.735:31600) : arch=ppc64 syscall=fchown success=no exit=-13(Permission denied) a0=1 a1=0 a2=0 a3=2 items=1 ppid=19225 pid=19226 auid=root uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=pts1 ses=179 comm=prelink exe=/usr/sbin/prelink subj=unconfined_u:system_r:prelink_t:s0-s0:c0.c1023 key=(null) 
type=AVC msg=audit(06/05/2014 06:02:35.735:31600) : avc:  denied  { setattr } for  pid=19226 comm=prelink name= dev=pipefs ino=128576 scontext=unconfined_u:system_r:prelink_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:crond_t:s0-s0:c0.c1023 tclass=fifo_file 
----

Expected results:
 * prelink does not call fchown() on the pipe, where prelink process sends its output
Comment 1 Milos Malik 2014-06-05 09:20:09 UTC 
# ldd `which id`
	linux-vdso64.so.1 =>  (0x00000fff87a00000)
	libselinux.so.1 => /lib64/libselinux.so.1 (0x00000080ca8a0000)
	libc.so.6 => /lib64/libc.so.6 (0x00000080ca360000)
	libdl.so.2 => /lib64/libdl.so.2 (0x00000080ca590000)
	/lib64/ld64.so.1 (0x0000000033e50000)
# strace -f -o output.txt -E LD_PRELOAD=/lib64/libfreebl3.so `which id`
uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
# grep -e prelink -e fchown output.txt 
19336 stat("/usr/sbin/prelink", {st_mode=S_IFREG|0755, st_size=1402904, ...}) = 0
19337 execve("/usr/sbin/prelink", ["/usr/sbin/prelink", "-u", "-o", "-", "/lib64/libfreebl3.so"], [/* 38 vars */] <unfinished ...>
19337 fchown(1, 0, 0 <unfinished ...>
19337 <... fchown resumed> )            = -1 EACCES (Permission denied)
#
Comment 2 Milos Malik 2014-06-05 09:38:56 UTC 
See also BZ#1103674.
Comment 3 Bob Relyea 2014-06-11 18:09:54 UTC 
Yes, freebl this is by design. It's a fips requirement.
Comment 4 Eric Paris 2014-07-09 13:33:29 UTC 

*** This bug has been marked as a duplicate of bug 1103674 ***
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