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NULL Pointer Access in function imagetopnm of convert.c:1943(jp2) #857

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Young-X opened this issue Oct 29, 2016 · 5 comments
Open

NULL Pointer Access in function imagetopnm of convert.c:1943(jp2) #857

Young-X opened this issue Oct 29, 2016 · 5 comments

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@Young-X
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@Young-X Young-X commented Oct 29, 2016

DESCRIPTION
OPENJPEG null ptr dereference in convertbmp.c:980

VERSION
OPENJPEG-2.1.2

Address Sanitizer Output
==3411==ERROR: AddressSanitizer: SEGV on unknown address 0x00000000 (pc 0x08146eaf bp 0xbfc960a8 sp 0xbfc96040 T0)
#0 0x8146eae (/home/yang/openjpeg/openjpeg-2.1.2/build-clang/bin/opj_decompress+0x8146eae)
#1 0x813715c (/home/yang/openjpeg/openjpeg-2.1.2/build-clang/bin/opj_decompress+0x813715c)
#2 0xb7403636 (/lib/i386-linux-gnu/libc.so.6+0x18636)
#3 0x805f327 (/home/yang/openjpeg/openjpeg-2.1.2/build-clang/bin/opj_decompress+0x805f327)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/home/yang/openjpeg/openjpeg-2.1.2/build-clang/bin/opj_decompress+0x8146eae)

GDB Information
Breakpoint 4, imagetopnm (image=0x8d2d5c0, outfile=0xbfb08654 "image.pnm", force_split=0)
at /home/yang/openjpeg/openjpeg-2.1.2/src/bin/jp2/convert.c:1935
1935 red = image->comps[compno].data;
(rr) p red
$7 = (int *) 0xbfb05558
(rr) p image->comps[compno].data
$8 = (OPJ_INT32 *) 0x0
(rr) c
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x08051b76 in imagetopnm (image=0x8d2d5c0, outfile=0xbfb08654 "image.pnm", force_split=0)
at /home/yang/openjpeg/openjpeg-2.1.2/src/bin/jp2/convert.c:1943
1943 v = *red + adjustR; ++red;

Analysis
image->comps[compno].data = NULL and it was assigned to red, so the program accesses to red, segment fault occurs.

Poc
Contact me if you need Poc file at YangX92@hotmail.com

@Young-X Young-X changed the title NULL Pointer Access in function imagetopnm of convrt.c:1943(jp2) NULL Pointer Access in function imagetopnm of convert.c:1943(jp2) Oct 29, 2016
@1ucian0

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@1ucian0 1ucian0 commented Dec 3, 2016

Please, refer to this issue as CVE-2016-9114

@rouault

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@rouault rouault commented Aug 9, 2017

@Young-X Please verify if that occurs still with latest master. If so, please attach the reproducer to the ticket

@carnil

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@carnil carnil commented Sep 23, 2017

@Young-X can you please provide the reproducer?

@Young-X

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@Young-X Young-X commented Oct 24, 2017

There is no crash with latest version and PoC that triggered #857.
Sorry for replying late.

@carnil

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@carnil carnil commented Oct 29, 2017

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