[pcre-dev] [Bug 2778] pchars (pcretest.c:2045) in PCRE8.45 c…

Top Page

Reply to this message
Author: admin
Date:  
To: pcre-dev
Subject: [pcre-dev] [Bug 2778] pchars (pcretest.c:2045) in PCRE8.45 can cause heap-buffer-overflow.
https://bugs.exim.org/show_bug.cgi?id=2778

--- Comment #1 from chengxianglin <670605832@???> ---
(In reply to chengxianglin from comment #0)
> ==8248==ERROR: AddressSanitizer: heap-buffer-overflow on address
> 0x62d000008400 at pc 0x00000052a0a6 bp 0x7ffd4e81eea0 sp 0x7ffd4e81ee98
> READ of size 1 at 0x62d000008400 thread T0
>     #0 0x52a0a5 in pchars /pcre/pcretest.c:2045:7
>     #1 0x52b04a in callout /pcre/pcretest.c:2272:9
>     #2 0x5b17e1 in internal_dfa_exec
> /pcre-CVE-2017-7186/pcre_dfa_exec.c:3080:20
>     #3 0x58d425 in pcre_dfa_exec /pcre/pcre_dfa_exec.c:3618:8
>     #4 0x522479 in main /pcre/pcretest.c:5214:9
>     #5 0x7f40690b482f in __libc_start_main
> /build/glibc-LK5gWL/glibc-2.23/csu/../csu/libc-start.c:291
>     #6 0x419c88 in _start (/pcre-CVE-2017-7186/pcretest+0x419c88)

>
> 0x62d000008400 is located 0 bytes to the right of 32768-byte region
> [0x62d000000400,0x62d000008400)
> allocated by thread T0 here:
>     #0 0x4d2718 in realloc
> /fuzzer/build/llvm_tools/llvm-4.0.0.src/projects/compiler-rt/lib/asan/
> asan_malloc_linux.cc:79
>     #1 0x51b762 in main /pcre/pcretest.c:4593:31
>     #2 0x7f40690b482f in __libc_start_main
> /build/glibc-LK5gWL/glibc-2.23/csu/../csu/libc-start.c:291

>
> SUMMARY: AddressSanitizer: heap-buffer-overflow
> /pcre-CVE-2017-7186/pcretest.c:2045:7 in pchars
> Shadow bytes around the buggy address:
>   0x0c5a7fff9030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c5a7fff9040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c5a7fff9050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c5a7fff9060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c5a7fff9070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> =>0x0c5a7fff9080:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c5a7fff9090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c5a7fff90a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c5a7fff90b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c5a7fff90c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c5a7fff90d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
> fa==8248==ERROR: AddressSanitizer: heap-buffer-overflow on address
> 0x62d000008400 at pc 0x00000052a0a6 bp 0x7ffd4e81eea0 sp 0x7ffd4e81ee98
> READ of size 1 at 0x62d000008400 thread T0
>     #0 0x52a0a5 in pchars /pcre/pcretest.c:2045:7
>     #1 0x52b04a in callout /pcr/pcretest.c:2272:9
>     #2 0x5b17e1 in internal_dfa_exec
> /pcre-CVE-2017-7186/pcre_dfa_exec.c:3080:20
>     #3 0x58d425 in pcre_dfa_exec /pcre/pcre_dfa_exec.c:3618:8
>     #4 0x522479 in main /pcre/pcretest.c:5214:9
>     #5 0x7f40690b482f in __libc_start_main
> /build/glibc-LK5gWL/glibc-2.23/csu/../csu/libc-start.c:291
>     #6 0x419c88 in _start (/pcre/pcretest+0x419c88)

>
> 0x62d000008400 is located 0 bytes to the right of 32768-byte region
> [0x62d000000400,0x62d000008400)
> allocated by thread T0 here:
>     #0 0x4d2718 in realloc
> /fuzzer/build/llvm_tools/llvm-4.0.0.src/projects/compiler-rt/lib/asan/
> asan_malloc_linux.cc:79
>     #1 0x51b762 in main /pcre/pcretest.c:4593:31
>     #2 0x7f40690b482f in __libc_start_main
> /build/glibc-LK5gWL/glibc-2.23/csu/../csu/libc-start.c:291

>
> SUMMARY: AddressSanitizer: heap-buffer-overflow
> /pcre-CVE-2017-7186/pcretest.c:2045:7 in pchars
> Shadow bytes around the buggy address:
>   0x0c5a7fff9030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c5a7fff9040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c5a7fff9050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c5a7fff9060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c5a7fff9070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> =>0x0c5a7fff9080:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c5a7fff9090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c5a7fff90a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c5a7fff90b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c5a7fff90c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c5a7fff90d0: 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
>   Freed heap region:       fd
>   Stack left redzone:      f1
>   Stack mid redzone:       f2
>   Stack right redzone:     f3
>   Stack after return:      f5
>   Stack use after scope:   f8
>   Global redzone:          f9
>   Global init order:       f6
>   Poisoned by user:        f7
>   Container overflow:      fc
>   Array cookie:            ac
>   Intra object redzone:    bb
>   ASan internal:           fe
>   Left alloca redzone:     ca
>   Right alloca redzone:    cb
> ==8248==ABORTING


--
You are receiving this mail because:
You are on the CC list for the bug.