1465061 – There is an invalid free in Image::printIFDStructure that leads to a Segmentation fault at exiv2. A crafted input will lead to remote denial of service attack.

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Bug 1465061 - There is an invalid free in Image::printIFDStructure that leads to a Segmentation fault at exiv2. A crafted input will lead to remote denial of service attack.

Summary: There is an invalid free in Image::printIFDStructure that leads to a Segmenta...

Keywords:
Status:	CLOSED ERRATA
Alias:	None
Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	exiv2
Sub Component:
Version:	7.5-Alt
Hardware:	x86_64
OS:	Linux
Priority:	unspecified
Severity:	urgent
Target Milestone:	rc
Target Release:	---
Assignee:	Jan Grulich
QA Contact:	Desktop QE
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2017-06-26 14:09 UTC by owl337
Modified:	2019-08-06 12:47 UTC (History)
CC List:	2 users (show)
Fixed In Version:
Doc Type:	If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed:	2019-08-06 12:46:47 UTC
Target Upstream Version:
Embargoed:

Attachments	(Terms of Use)
Triggered by "exiv POC1" (93 bytes, application/x-rar) 2017-06-26 14:09 UTC, owl337	no flags	Details
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System	ID	Private	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2019:2101	0	None	None	None	2019-08-06 12:47:09 UTC

Description owl337 2017-06-26 14:09:44 UTC

Created attachment 1291986 [details]
Triggered by  "exiv POC1"

Description of problem:

There is an ivalid free in Image::printIFDStructure that leads to a Segmentation fault at exiv2. A crafted input will lead to remote denial of service attack.

Version-Release number of selected component (if applicable):

<= 0.26

How reproducible:

exiv2 POC1


Steps to Reproduce:

$./exiv2 POC1

invalid type value detected in Image::printIFDStructure:  32768
Exiv2  exception in print action for file POC1:
invalid type value detected in Image::printIFDStructure
Segmentation fault

The gdb debugging information is as follows:

(gdb) set args POC1
(gdb) r
...
invalid type value detected in Image::printIFDStructure

Program received signal SIGSEGV, Segmentation fault.
__GI___libc_free (mem=0x656400) at malloc.c:2933
2933	malloc.c: No such file or directory.
(gdb) bt
#0  __GI___libc_free (mem=0x656400) at malloc.c:2933
#1  0x00007ffff745b823 in __gnu_cxx::new_allocator<char>::deallocate (
    __p=0x656400 <error: Cannot access memory at address 0x656400>, this=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/ext/new_allocator.h:110
#2  __gnu_cxx::__alloc_traits<std::allocator<char> >::deallocate (
    __p=0x656400 <error: Cannot access memory at address 0x656400>, __a=..., __n=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/ext/alloc_traits.h:185
#3  std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_destroy (this=<optimized out>, 
    __size=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/basic_string.h:185
#4  std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_dispose (this=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/basic_string.h:180
#5  std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string (
    this=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/basic_string.h:544
#6  std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::~pair (
    this=<optimized out>) at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/stl_pair.h:96
#7  __gnu_cxx::new_allocator<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::destroy (this=<optimized out>, __p=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/ext/new_allocator.h:133
#8  std::_Rb_tree<int, std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<int>, std::allocator<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_destroy_node (this=0x7ffff79a0818 <Exiv2::tagName(unsigned short, unsigned long)::tags>, 
---Type <return> to continue, or q <return> to quit---
    __p=0x0) at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/stl_tree.h:520
#9  std::_Rb_tree<int, std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<int>, std::allocator<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_drop_node (this=0x7ffff79a0818 <Exiv2::tagName(unsigned short, unsigned long)::tags>, 
    __p=0x0) at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/stl_tree.h:561
#10 std::_Rb_tree<int, std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<int>, std::allocator<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_erase (this=0x7ffff79a0818 <Exiv2::tagName(unsigned short, unsigned long)::tags>, __x=0x0)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/stl_tree.h:1614
#11 0x00007ffff745b7e3 in std::_Rb_tree<int, std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<int>, std::allocator<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_erase (
    this=0x7ffff79a0818 <Exiv2::tagName(unsigned short, unsigned long)::tags>, __x=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/stl_tree.h:1612
#12 0x00007ffff745b7e3 in std::_Rb_tree<int, std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<int>, std::allocator<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_erase (
    this=0x7ffff79a0818 <Exiv2::tagName(unsigned short, unsigned long)::tags>, __x=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/stl_tree.h:1612
#13 0x00007ffff745b7e3 in std::_Rb_tree<int, std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>---Type <return> to continue, or q <return> to quit---
, std::allocator<char> > >, std::_Select1st<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<int>, std::allocator<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_erase (
    this=0x7ffff79a0818 <Exiv2::tagName(unsigned short, unsigned long)::tags>, __x=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/stl_tree.h:1612
#14 0x00007ffff745b7e3 in std::_Rb_tree<int, std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<int>, std::allocator<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_erase (
    this=0x7ffff79a0818 <Exiv2::tagName(unsigned short, unsigned long)::tags>, __x=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/stl_tree.h:1612
#15 0x00007ffff745b7e3 in std::_Rb_tree<int, std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::_Select1st<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::less<int>, std::allocator<std::pair<int const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >::_M_erase (
    this=0x7ffff79a0818 <Exiv2::tagName(unsigned short, unsigned long)::tags>, __x=<optimized out>)
    at /usr/bin/../lib/gcc/x86_64-linux-gnu/5.2.1/../../../../include/c++/5.2.1/bits/stl_tree.h:1612
#16 0x00007ffff6694c92 in __run_exit_handlers (status=1, listp=0x7ffff6a1f698 <__exit_funcs>, 
    run_list_atexit=run_list_atexit@entry=true) at exit.c:82
#17 0x00007ffff6694ce5 in __GI_exit (status=<optimized out>) at exit.c:104
#18 0x00007ffff667bac7 in __libc_start_main (main=0x407240 <main(int, char* const*)>, argc=2, argv=0x7fffffffe538, 
    init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe528) at libc-start.c:323
#19 0x0000000000407169 in _start ()

This vulnerability was triggered in __GI___libc_free() at line malloc.c:2933. From the information above we can see that the program try to free a memory it can not access. In order to get more information, we use AddressSanitizer mode compiling the program . 

$ ./exiv2 POC1
invalid type value detected in Image::printIFDStructure:  32768
Exiv2 exception in print action for file POC1:
invalid type value detected in Image::printIFDStructure
=================================================================
==28127==ERROR: AddressSanitizer: attempting free on address which was not malloc()-ed: 0x60200000ed90 in thread T0
    #0 0x4e1c92  (/home/icy/real/exiv2-asan/install/bin/exiv2+0x4e1c92)
    #1 0x51515c  (/home/icy/real/exiv2-asan/install/bin/exiv2+0x51515c)
    #2 0x4e2fe6  (/home/icy/real/exiv2-asan/install/bin/exiv2+0x4e2fe6)
    #3 0x7f057e3ffabf  (/lib/x86_64-linux-gnu/libc.so.6+0x20abf)
    #4 0x43b288  (/home/icy/real/exiv2-asan/install/bin/exiv2+0x43b288)

AddressSanitizer can not describe address in more detail (wild memory access suspected).
==28127==ABORTING


Actual results:

crash

Expected results:

crash


Additional info:

Credits:

This vulnerability is detected by team OWL337, with our custom fuzzer collAFL. Please contact ganshuitao   and chaoz.cn if you need more info about the team, the tool or the vulnerability.

Comment 2 Dan Čermák 2017-10-29 23:49:36 UTC

The upstream issue is: https://github.com/Exiv2/exiv2/issues/144. The issue has been fixed on the master branch.

Comment 4 Jan Grulich 2019-01-28 16:08:13 UTC

Fixed with exiv2-0.27.0-1.el7_6.

Comment 8 errata-xmlrpc 2019-08-06 12:46:47 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/RHSA-2019:2101

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