| Summary: | heap-buffer-overflow at contrib/japanese/gdevmjc.c:670 in mj_raster_cmd | ||
|---|---|---|---|
| Product: | Ghostscript | Reporter: | Suhwan <prada960808> |
| Component: | General | Assignee: | Julian Smith <julian.smith> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | ||
| Priority: | P4 | ||
| Version: | master | ||
| Hardware: | PC | ||
| OS: | Linux | ||
| Customer: | Word Size: | --- | |
| Attachments: | poc | ||
Created attachment 18377 [details] poc Hello. I found a heap-buffer-overflow bug in GhostScript. Please confirm. Thanks. OS: Ubuntu 18.04 64bit Steps to reproduce: 1. Download the .POC files. 2. Compile the source code with ASan. 3. Run following cmd. gs -sOutputFile=tmp -sDEVICE=mj700v2c $PoC Here's ASAN report ================================================================= ==42361==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62f000029670 at pc 0x000001fdc864 bp 0x7fffdbbb03c0 sp 0x7fffdbbb03b8 READ of size 1 at 0x62f000029670 thread T0 #0 0x1fdc863 in mj_raster_cmd ghostpdl/./contrib/japanese/gdevmjc.c:670:18 #1 0x1fd2de5 in mj_print_page ghostpdl/./contrib/japanese/gdevmjc.c:1393:13 #2 0x13f07d9 in gx_default_print_page_copies ghostpdl/./base/gdevprn.c:1231:12 #3 0x13ef028 in gdev_prn_output_page_aux ghostpdl/./base/gdevprn.c:1133:27 #4 0x22b6f20 in gs_output_page ghostpdl/./base/gsdevice.c:212:17 #5 0x3054b9f in zoutputpage ghostpdl/./psi/zdevice.c:416:12 #6 0x2e8bdb6 in interp ghostpdl/./psi/interp.c:1300:28 #7 0x2e8bdb6 in gs_call_interp ghostpdl/./psi/interp.c:520 #8 0x2e8bdb6 in gs_interpret ghostpdl/./psi/interp.c:477 #9 0x2e3f451 in gs_main_interpret ghostpdl/./psi/imain.c:253:12 #10 0x2e3f451 in gs_main_run_string_end ghostpdl/./psi/imain.c:791 #11 0x2e3f451 in gs_main_run_string_with_length ghostpdl/./psi/imain.c:735 #12 0x2e548f0 in run_string ghostpdl/./psi/imainarg.c:1117:12 #13 0x2e548f0 in runarg ghostpdl/./psi/imainarg.c:1086 #14 0x2e5302a in argproc ghostpdl/./psi/imainarg.c:1008:16 #15 0x2e479f7 in gs_main_init_with_args01 ghostpdl/./psi/imainarg.c:241:24 #16 0x2e539d0 in gs_main_init_with_args ghostpdl/./psi/imainarg.c:288:16 #17 0x57b86f in main ghostpdl/./psi/gs.c:95:16 #18 0x7fe15e3f1b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310 #19 0x482e79 in _start (gs+0x482e79) 0x62f000029670 is located 0 bytes to the right of 53872-byte region [0x62f00001c400,0x62f000029670) allocated by thread T0 here: #0 0x542d30 in __interceptor_malloc (gs+0x542d30) #1 0x23640fd in gs_heap_alloc_bytes ghostpdl/./base/gsmalloc.c:193:34 SUMMARY: AddressSanitizer: heap-buffer-overflow ghostpdl/./contrib/japanese/gdevmjc.c:670:18 in mj_raster_cmd Shadow bytes around the buggy address: 0x0c5e7fffd270: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c5e7fffd280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c5e7fffd290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c5e7fffd2a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c5e7fffd2b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0c5e7fffd2c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00[fa]fa 0x0c5e7fffd2d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c5e7fffd2e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c5e7fffd2f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c5e7fffd300: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c5e7fffd310: 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 ==42361==ABORTING