https://bugs.exim.org/show_bug.cgi?id=2773
Bug ID: 2773 Summary: pcretest.c in PCRE 8.40 allows remote attackers to cause a denial of service (heap-based buffer overflow) Product: PCRE Version: 8.40 Hardware: x86-64 OS: Linux Status: NEW Severity: bug Priority: medium Component: Code Assignee: philip.ha...@gmail.com Reporter: 670605...@qq.com CC: pcre-dev@exim.org ==28550==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62d000008400 at pc 0x00000052a216 bp 0x7ffc5b356fa0 sp 0x7ffc5b356f98 READ of size 1 at 0x62d000008400 thread T0 #0 0x52a215 in pchars /pcre/pcretest.c:2045:7 #1 0x52b18a in callout /pcre/pcretest.c:2272:9 #2 0x5b0dea in internal_dfa_exec /pcre/pcre_dfa_exec.c:3078:20 #3 0x58cb45 in pcre_dfa_exec /pcre/pcre_dfa_exec.c:3616:8 #4 0x5225f4 in main /pcre/pcretest.c:5205:9 #5 0x7f48c72d282f 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 0x51b809 in main /pcre/pcretest.c:4593:31 #2 0x7f48c72d282f in __libc_start_main /build/glibc-LK5gWL/glibc-2.23/csu/../csu/libc-start.c:291 SUMMARY: AddressSanitizer: heap-buffer-overflow /pcre/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 ==28550==ABORTING -- You are receiving this mail because: You are on the CC list for the bug. -- ## List details at https://lists.exim.org/mailman/listinfo/pcre-dev