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Bug 1517979

Summary:	heap-buffer-overflow in slapi_dn_find_parent_ext
Product:	Red Hat Enterprise Linux 7	Reporter:	Viktor Ashirov <vashirov>
Component:	389-ds-base	Assignee:	mreynolds
Status:	CLOSED WORKSFORME	QA Contact:	RHDS QE <ds-qe-bugs>
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	7.5	CC:	nkinder, pasik, rmeggins, vashirov
Target Milestone:	rc
Target Release:	7.9
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-02-28 15:14:56 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:

Description Viktor Ashirov 2017-11-27 19:46:58 UTC

Description of problem:
=================================================================
==7125== ERROR: AddressSanitizer: heap-buffer-overflow on address 0x600400511edb at pc 0x7f46b06bd758 bp 0x7f467b9ce590 sp 0x7f467b9ce580
READ of size 1 at 0x600400511edb thread T31
==7125== WARNING: Trying to symbolize code, but external symbolizer is not initialized!
    #0 0x7f46b06bd757 in slapi_dn_find_parent_ext /usr/src/debug/389-ds-base-1.3.7.5/ldap/servers/slapd/dn.c:1633
    #1 0x7f46b06bd8d8 in slapi_dn_parent /usr/src/debug/389-ds-base-1.3.7.5/ldap/servers/slapd/dn.c:1668
    #2 0x7f46b0738753 in do_modrdn /usr/src/debug/389-ds-base-1.3.7.5/ldap/servers/slapd/modrdn.c:175
    #3 0x5633f97c0e54 in ?? /usr/src/debug/389-ds-base-1.3.7.5/ldap/servers/slapd/connection.c:619
    #4 0x7f46ae84bc8a in PR_Select /usr/src/debug/nspr-4.17.0/pr/src/pthreads/../../../nspr/pr/src/pthreads/ptthread.c:216
    #5 0x7f46b0d40867 in _ZN6__asan10AsanThread11ThreadStartEv _asan_rtl_
    #6 0x7f46ae1ebdd4 in start_thread /usr/src/debug/glibc-2.17-c758a686/nptl/pthread_create.c:308
    #7 0x7f46ad8999bc in __clone /usr/src/debug////////glibc-2.17-c758a686/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:113
0x600400511edb is located 0 bytes to the right of 11-byte region [0x600400511ed0,0x600400511edb)
allocated by thread T31 here:
    #0 0x7f46b0d3cef9 in malloc _asan_rtl_
    #1 0x7f46ad8276e9 in __GI___strdup /usr/src/debug/glibc-2.17-c758a686/string/strdup.c:42
Thread T31 created by T0 here:
    #0 0x7f46b0d31a0a in __interceptor_pthread_create _asan_rtl_
    #1 0x7f46ae84b95b in PR_Select /usr/src/debug/nspr-4.17.0/pr/src/pthreads/../../../nspr/pr/src/pthreads/ptthread.c:457
    #2 0x0
Shadow bytes around the buggy address:
  0x0c010009a380: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c010009a390: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c010009a3a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c010009a3b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c010009a3c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c010009a3d0: fa fa fa fa fa fa fa fa fa fa 00[03]fa fa fd fd
  0x0c010009a3e0: fa fa 00 03 fa fa 00 03 fa fa fd fd fa fa 00 03
  0x0c010009a3f0: fa fa 00 02 fa fa 00 03 fa fa 07 fa fa fa fd fa
  0x0c010009a400: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c010009a410: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c010009a420: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07
  Heap left redzone:     fa
  Heap righ redzone:     fb
  Freed Heap region:     fd
  Stack left redzone:    f1
  Stack mid redzone:     f2
  Stack right redzone:   f3
  Stack partial redzone: f4
  Stack after return:    f5
  Stack use after scope: f8
  Global redzone:        f9
  Global init order:     f6
  Poisoned by user:      f7
  ASan internal:         fe
==7125== ABORTING


Version-Release number of selected component (if applicable):
389-ds-base-1.3.7.5-10.el7.x86_64

Comment 2 wibrown@redhat.com 2017-11-28 14:44:46 UTC

I think to solve this I'll need some more info about what DN is the problem. It may be that the DN is not null terminated which is what leads to this issue ...

Comment 3 wibrown@redhat.com 2017-11-28 15:37:34 UTC

Upstream ticket:
https://pagure.io/389-ds-base/issue/49472