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Date: Wed, 1 Nov 2017 10:26:56 +0800
From: "旺仔" <16362505@...com>
To: "oss-security" <oss-security@...ts.openwall.com>
Subject: CVE-2017-16231: PCRE 8.41 match() stack overflow; CVE-2017-16232: LibTIFF 4.0.8 memory leaks

------------------ Original ------------------
From:  "cve-request"<cve-request@...re.org>;
Date:  Mon, Oct 30, 2017 08:36 PM
To:  "zhangjw"<zhangjw@...t.org.cn>; 
Cc:  "cve-request"<cve-request@...re.org>; 
Subject:  Re: [scr412063] PCRE; LibTIFF

 
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The two CVE IDs are below. Please note that CVE can cover a memory
leak within a library (such as any file in the tiff-4.0.8/libtiff
subdirectory), but cannot cover a memory leak in a command-line
program. Therefore, please omit reports about a memory leak affecting
tools/tiff2bw.c or a different tools/*.c file.


> [Suggested description]
> In PCRE 8.41,
> after compiling, a pcretest load test PoC produces a crash overflow
> in the function match() in pcre_exec.c because of a self-recursive call.
> 
> ------------------------------------------
> 
> [Vulnerability Type]
> Buffer Overflow
> 
> ------------------------------------------
> 
> [Vendor of Product]
> Perl Compatible Regular Expressions
> 
> ------------------------------------------
> 
> [Affected Product Code Base]
> PCRE - 8.41
> 
> ------------------------------------------
> 
> [Affected Component]
> file:pcre_exec.c
> function match() line 983 and line 2061
> 
> ------------------------------------------
> 
> [Attack Type]
> Local
> 
> ------------------------------------------
> 
> [Impact Denial of Service]
> true
> 
> ------------------------------------------
> 
> [Attack Vectors]
> A crash file
> 
> ------------------------------------------
> 
> [Discoverer]
> ZHANG JIAWANG from cncert

Use CVE-2017-16231.


> [Suggested description]
> LibTIFF 4.0.8 has multiple memory leak vulnerabilities, which allow
> attackers to cause a denial of service (memory consumption), as demonstrated
> by tif_open.c, tif_lzw.c, and tif_aux.c
> 
> ------------------------------------------
> 
> [Additional Information]
> /tiff2bw ../../../../libtiff_4.0.8_afl/2bw_output/crashes/poc.tif 222.tif
> LZWDecode: Not enough data at scanline 0 (short 6442443006 bytes).
> /usr/local/bin/llvm-symbolizer: /lib/x86_64-linux-gnu/libtinfo.so.5: no version information available (required by /usr/local/bin/llvm-symbolizer)
> 
> =================================================================
> ==25328==ERROR: LeakSanitizer: detected memory leaks
> 
> Direct leak of 6442451106 byte(s) in 1 object(s) allocated from:
>     #0 0x4bbfd3 in __interceptor_malloc /home/brian/final/llvm.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:67:3
>     #1 0x4e88be in main /home/zzt/Fuzzing/Victims/ASAN/tiff-4.0.8/tools/tiff2bw.c:258:28
>     #2 0x7f293f0fdabf in __libc_start_main /build/glibc-qbmteM/glibc-2.21/csu/libc-start.c:289
> 
> Direct leak of 1137 byte(s) in 1 object(s) allocated from:
>     #0 0x4bbfd3 in __interceptor_malloc /home/brian/final/llvm.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:67:3
>     #1 0x54d6b6 in TIFFClientOpen /home/zzt/Fuzzing/Victims/tiff-4.0.8/libtiff/tif_open.c:119
> 
> Indirect leak of 81904 byte(s) in 1 object(s) allocated from:
>     #0 0x4bbfd3 in __interceptor_malloc /home/brian/final/llvm.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:67:3
>     #1 0x5ea2e9 in LZWSetupDecode /home/zzt/Fuzzing/Victims/tiff-4.0.8/libtiff/tif_lzw.c:232
> 
> Indirect leak of 2273 byte(s) in 5 object(s) allocated from:
>     #0 0x4bc3d7 in realloc /home/brian/final/llvm.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:98:3
>     #1 0x56f5db in _TIFFCheckRealloc /home/zzt/Fuzzing/Victims/tiff-4.0.8/libtiff/tif_aux.c:73
>     #2 0x56f5db in _TIFFCheckMalloc /home/zzt/Fuzzing/Victims/tiff-4.0.8/libtiff/tif_aux.c:88
> 
> Indirect leak of 1240 byte(s) in 2 object(s) allocated from:
>     #0 0x4bc3d7 in realloc /home/brian/final/llvm.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:98:3
>     #1 0x56f430 in _TIFFCheckRealloc /home/zzt/Fuzzing/Victims/tiff-4.0.8/libtiff/tif_aux.c:73
> 
> ------------------------------------------
> 
> [Vendor of Product]
> TIFF Library and Utilities
> 
> ------------------------------------------
> 
> [Affected Product Code Base]
> LibTIFF tiff2bw - 4.0.8
> 
> ------------------------------------------
> 
> [Affected Component]
> multi memory leak vulnerabilities in files as tiff2bw.c tif_open.c and so on
> 
> ------------------------------------------
> 
> [Attack Type]
> Local
> 
> ------------------------------------------
> 
> [Impact Denial of Service]
> true
> 
> ------------------------------------------
> 
> [Attack Vectors]
> to open a poc file
> 
> ------------------------------------------
> 
> [Discoverer]
> ZHANG JIAWANG from cncert

Use CVE-2017-16232.


- -- 
CVE Assignment Team
M/S M300, 202 Burlington Road, Bedford, MA 01730 USA
[ A PGP key is available for encrypted communications at
  http://cve.mitre.org/cve/request_id.html ]
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Download attachment "pcre_poc.txt" of type "application/octet-stream" (23850 bytes)

Download attachment "libtiff_poc.tif" of type "application/octet-stream" (6684 bytes)

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