Description:
Mujstest, which is part of mupdf is a scriptable tester for mupdf + js.
A fuzzing revealed a strcpy-param-overlap.
The complete ASan output:
# mujstest $FILE
==26843==ERROR: AddressSanitizer: strcpy-param-overlap: memory ranges [0x0000013c5d40,0x0000013c62ed) and [0x0000013c6285, 0x0000013c6832) overlap
#0 0x473129 in __interceptor_strcpy /var/tmp/portage/sys-devel/llvm-3.8.0-r3/work/llvm-3.8.0.src/projects/compiler-rt/lib/asan/asan_interceptors.cc:545
#1 0x4f7910 in main /var/tmp/portage/app-text/mupdf-1.9a/work/mupdf-1.9a/platform/x11/jstest_main.c:353:6
#2 0x7f8af37a961f in __libc_start_main /var/tmp/portage/sys-libs/glibc-2.22-r4/work/glibc-2.22/csu/libc-start.c:289
#3 0x41ade8 in _init (/usr/bin/mujstest+0x41ade8)
0x0000013c6140 is located 0 bytes to the right of global variable 'filename' defined in 'platform/x11/jstest_main.c:15:13' (0x13c5d40) of size 1024
0x0000013c6285 is located 5 bytes inside of global variable 'getline_buffer' defined in 'platform/x11/jstest_main.c:24:13' (0x13c6280) of size 4096
SUMMARY: AddressSanitizer: strcpy-param-overlap /var/tmp/portage/sys-devel/llvm-3.8.0-r3/work/llvm-3.8.0.src/projects/compiler-rt/lib/asan/asan_interceptors.cc:545 in __interceptor_strcpy
==26843==ABORTING
Affected version:
1.9a
Fixed version:
1.10 (not yet released)
Commit fix:
http://git.ghostscript.com/?p=mupdf.git;h=cfe8f35bca61056363368c343be36812abde0a06
Credit:
This bug was discovered by Agostino Sarubbo of Gentoo.
CVE:
N/A
Timeline:
2016-08-04: bug discovered
2016-08-05: bug reported to upstream
2016-09-22: upstream released a patch
2016-09-25: blog post about the issue
Note:
This bug was found with American Fuzzy Lop.
Permalink:
mupdf: mujstest: strcpy-param-overlap in main (jstest_main.c)