New submission from Daniel Kang <[email protected]>: For invalid stripoff sizes (e.g. negative), ffmpeg crashes with a buffer underflow. The patch attached checks for negative stripoff sizes.
gdb run:
(gdb) r -i ../fuzzed.tif del.jpg
Starting program: ffmpeg/ffmpeg_g -i ../fuzzed.tif del.jpg
[Thread debugging using libthread_db enabled]
FFmpeg version git-db48f42, Copyright (c) 2000-2011 the FFmpeg developers
built on Jan 8 2011 22:30:40 with gcc 4.4.5
configuration: --enable-gpl --disable-pthreads
libavutil 50.36. 0 / 50.36. 0
libavcore 0.16. 0 / 0.16. 0
libavcodec 52.107. 0 / 52.107. 0
libavformat 52.92. 0 / 52.92. 0
libavdevice 52. 2. 3 / 52. 2. 3
libavfilter 1.72. 0 / 1.72. 0
libswscale 0.12. 0 / 0.12. 0
Program received signal SIGSEGV, Segmentation fault.
tiff_unpack_strip (avctx=<value optimized out>, data=<value optimized out>,
data_size=<value optimized out>, avpkt=<value optimized out>) at
libavcodec/tiff.c:153
153 src2[i] = av_reverse[src[i]];
(gdb) bt
#0 tiff_unpack_strip (avctx=<value optimized out>, data=<value optimized out>,
data_size=<value optimized out>, avpkt=<value optimized out>) at
libavcodec/tiff.c:153
#1 decode_frame (avctx=<value optimized out>, data=<value optimized out>,
data_size=<value optimized out>, avpkt=<value optimized out>) at
libavcodec/tiff.c:543
#2 0x0000000000756d58 in avcodec_decode_video2 (avctx=0x1203260,
picture=0x7fffffffd150, got_picture_ptr=0x7fffffffd43c, avpkt=0x1207920) at
libavcodec/utils.c:637
#3 0x00000000004d75a0 in try_decode_frame (ic=0x1200510) at
libavformat/utils.c:2080
#4 av_find_stream_info (ic=0x1200510) at libavformat/utils.c:2361
#5 0x00000000004312db in opt_input_file (filename=0x7fffffffdafe
"../fuzzed.tif") at ffmpeg.c:3214
#6 0x000000000043b49c in parse_options (argc=4, argv=0x7fffffffd758,
options=<value optimized out>, parse_arg_function=0x437eb0 <opt_output_file>) at
cmdutils.c:208
#7 0x00000000004374a2 in main (argc=4, argv=0x7fffffffd758) at ffmpeg.c:4345
(gdb) disass $pc-32 $pc+32
Dump of assembler code from 0x747450 to 0x747490:
0x0000000000747450 <decode_frame+2288>: (bad)
0x0000000000747451 <decode_frame+2289>: add %eax,(%rax)
0x0000000000747453 <decode_frame+2291>: add %al,-0x587bf00a(%rbp)
0x0000000000747459 <decode_frame+2297>: (bad)
0x000000000074745a <decode_frame+2298>: add %al,(%rax)
0x000000000074745c <decode_frame+2300>: test %r14d,%r14d
0x000000000074745f <decode_frame+2303>: movslq %r14d,%r12
0x0000000000747462 <decode_frame+2306>: jle 0x74748d <decode_frame+2349>
0x0000000000747464 <decode_frame+2308>: lea -0x1(%r14),%edx
0x0000000000747468 <decode_frame+2312>: lea 0x1(%rbp,%rdx,1),%rcx
0x000000000074746d <decode_frame+2317>: nopl (%rax)
0x0000000000747470 <decode_frame+2320>: movzbl 0x0(%rbp),%edx
0x0000000000747474 <decode_frame+2324>: add $0x1,%rbp
0x0000000000747478 <decode_frame+2328>: movzbl 0xa5aac0(%rdx),%edx
0x000000000074747f <decode_frame+2335>: mov %dl,(%rax)
0x0000000000747481 <decode_frame+2337>: add $0x1,%rax
0x0000000000747485 <decode_frame+2341>: cmp %rcx,%rbp
0x0000000000747488 <decode_frame+2344>: jne 0x747470 <decode_frame+2320>
0x000000000074748a <decode_frame+2346>: movslq %r14d,%r12
0x000000000074748d <decode_frame+2349>: movq $0x0,(%r15,%r12,1)
End of assembler dump.
(gdb) info all-registers
rax 0x12086f0 18908912
rbx 0x1203720 18888480
rcx 0xfffffffffba38277 -73170313
rdx 0x106 262
rsi 0x1 1
rdi 0x7ffff724ae60 140737339764320
rbp 0xfffffffffba38170 0xfffffffffba38170
rsp 0x7fffffffcfa0 0x7fffffffcfa0
r8 0x12086e0 18908896
r9 0x0 0
r10 0x1 1
r11 0x7ffff6f73b33 140737336785715
r12 0x107 263
r13 0xc8 200
r14 0x107 263
r15 0x12086f0 18908912
rip 0x747470 0x747470 <decode_frame+2320>
eflags 0x10202 [ IF RF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0
st0 0 (raw 0x00000000000000000000)
st1 0 (raw 0x00000000000000000000)
st2 0 (raw 0x00000000000000000000)
st3 0 (raw 0x00000000000000000000)
st4 0 (raw 0x00000000000000000000)
st5 0 (raw 0x00000000000000000000)
st6 0 (raw 0x00000000000000000000)
st7 0 (raw 0x00000000000000000000)
fctrl 0x37f 895
fstat 0x0 0
ftag 0xffff 65535
fiseg 0x0 0
fioff 0x0 0
foseg 0x0 0
fooff 0x0 0
fop 0x0 0
xmm0 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x80 <repeats 16 times>}, v8_int16 = {0x8080, 0x8080, 0x8080,
0x8080, 0x8080,
0x8080, 0x8080, 0x8080}, v4_int32 = {0x80808080, 0x80808080, 0x80808080,
0x80808080}, v2_int64 = {0x8080808080808080, 0x8080808080808080},
uint128 = 0x80808080808080808080808080808080}
---Type <return> to continue, or q <return> to quit---
xmm1 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0},
v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 =
0x00000000000000000000000000000000}
xmm2 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0,
0x8000000000000000}, v16_int8 = {0x0 <repeats 13 times>, 0xff, 0xff, 0xff},
v8_int16 = {0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0xff00, 0xffff}, v4_int32 = {0x0, 0x0, 0x0, 0xffffff00},
v2_int64 = {0x0, 0xffffff0000000000}, uint128 =
0xffffff00000000000000000000000000}
xmm3 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double =
{0x8000000000000000, 0x8000000000000000}, v16_int8 = {0x0, 0xff <repeats 15
times>}, v8_int16 = {0xff00,
0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff}, v4_int32 =
{0xffffff00, 0xffffffff, 0xffffffff, 0xffffffff}, v2_int64 =
{0xffffffffffffff00,
0xffffffffffffffff}, uint128 = 0xffffffffffffffffffffffffffffff00}
xmm4 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0,
0x8000000000000000}, v16_int8 = {0x73, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x54,
0x72, 0x69, 0x65,
0x64, 0x20, 0x74, 0x6f}, v8_int16 = {0x73, 0x0, 0x0, 0x0, 0x7254, 0x6569,
0x2064, 0x6f74}, v4_int32 = {0x73, 0x0, 0x65697254, 0x6f742064}, v2_int64 =
{0x73,
0x6f74206465697254}, uint128 = 0x6f742064656972540000000000000073}
xmm5 {v4_float = {0x0, 0x1, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0, 0x0, 0x0, 0xe0, 0x95, 0x9c, 0xe7, 0x3f, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v8_int16 = {0x0, 0xe000, 0x9c95, 0x3fe7, 0x0, 0x0, 0x0, 0x0}, v4_int32
= {0xe0000000, 0x3fe79c95, 0x0, 0x0}, v2_int64 = {0x3fe79c95e0000000, 0x0},
uint128 = 0x00000000000000003fe79c95e0000000}
xmm6 {v4_float = {0x0, 0x1, 0x0, 0x0}, v2_double = {0x1, 0x0},
v16_int8 = {0x6d, 0x7d, 0xbf, 0xbb, 0x27, 0xaf, 0xf5, 0x3f, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0, 0x0}, v8_int16 = {0x7d6d, 0xbbbf, 0xaf27, 0x3ff5, 0x0, 0x0, 0x0, 0x0},
v4_int32 = {0xbbbf7d6d, 0x3ff5af27, 0x0, 0x0}, v2_int64 = {0x3ff5af27bbbf7d6d,
0x0},
uint128 = 0x00000000000000003ff5af27bbbf7d6d}
xmm7 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0, 0x0, 0x0, 0x0, 0x68, 0xc8, 0xbc, 0x3b, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0}, v8_int16 = {0x0, 0x0, 0xc868, 0x3bbc, 0x0, 0x0, 0x0, 0x0}, v4_int32 =
{0x0, 0x3bbcc868, 0x0, 0x0}, v2_int64 = {0x3bbcc86800000000, 0x0},
uint128 = 0x00000000000000003bbcc86800000000}
xmm8 {v4_float = {0x0, 0xfffffffd, 0x0, 0x0}, v2_double =
{0xffffffffffffffd2, 0x0}, v16_int8 = {0xe0, 0xe6, 0x35, 0x67, 0x9e, 0x6, 0x47,
0xc0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v8_int16 = {0xe6e0, 0x6735, 0x69e, 0xc047,
0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x6735e6e0, 0xc047069e, 0x0, 0x0}, v2_int64 = {
0xc047069e6735e6e0, 0x0}, uint128 = 0x0000000000000000c047069e6735e6e0}
xmm9 {v4_float = {0x0, 0x1, 0x0, 0x0}, v2_double = {0x1, 0x0},
v16_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xf0, 0x3f, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0}, v8_int16 = {0x0, 0x0, 0x0, 0x3ff0, 0x0, 0x0, 0x0, 0x0}, v4_int32 =
{0x0, 0x3ff00000, 0x0, 0x0}, v2_int64 = {0x3ff0000000000000, 0x0},
uint128 = 0x00000000000000003ff0000000000000}
xmm10 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0, 0x0, 0x46, 0x84, 0x24, 0x59, 0xd6, 0x3e, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v8_int16 = {0x0, 0x8446, 0x5924, 0x3ed6, 0x0, 0x0, 0x0, 0x0}, v4_int32
= {0x84460000, 0x3ed65924, 0x0, 0x0}, v2_int64 = {0x3ed6592484460000, 0x0},
uint128 = 0x00000000000000003ed6592484460000}
xmm11 {v4_float = {0x9689a800, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x6a, 0xa2, 0x65, 0x50, 0xf2, 0xea, 0x8f, 0xbd, 0x0, 0x0, 0x0, 0x0,
0x0,
0x0, 0x0, 0x0}, v8_int16 = {0xa26a, 0x5065, 0xeaf2, 0xbd8f, 0x0, 0x0, 0x0,
0x0}, v4_int32 = {0x5065a26a, 0xbd8feaf2, 0x0, 0x0}, v2_int64 =
{0xbd8feaf25065a26a,
0x0}, uint128 = 0x0000000000000000bd8feaf25065a26a}
xmm12 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x29, 0xf2, 0x88, 0x6c, 0xa6, 0x49, 0xde, 0x3e, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0, 0x0}, v8_int16 = {0xf229, 0x6c88, 0x49a6, 0x3ede, 0x0, 0x0, 0x0, 0x0},
v4_int32 = {0x6c88f229, 0x3ede49a6, 0x0, 0x0}, v2_int64 = {0x3ede49a66c88f229,
0x0},
uint128 = 0x00000000000000003ede49a66c88f229}
xmm13 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0xb3, 0x12, 0x58, 0x17, 0x64, 0x46, 0xe6, 0x3b, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0, 0x0}, v8_int16 = {0x12b3, 0x1758, 0x4664, 0x3be6, 0x0, 0x0, 0x0, 0x0},
v4_int32 = {0x175812b3, 0x3be64664, 0x0, 0x0}, v2_int64 = {0x3be64664175812b3,
0x0},
uint128 = 0x00000000000000003be64664175812b3}
xmm14 {v4_float = {0x0, 0x3, 0x0, 0x0}, v2_double = {0x2d, 0x0},
v16_int8 = {0xc0, 0x9, 0xf2, 0x16, 0xb5, 0xdf, 0x46, 0x40, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0, 0x0}, v8_int16 = {0x9c0, 0x16f2, 0xdfb5, 0x4046, 0x0, 0x0, 0x0, 0x0},
v4_int32 = {0x16f209c0, 0x4046dfb5, 0x0, 0x0}, v2_int64 = {0x4046dfb516f209c0,
0x0},
uint128 = 0x00000000000000004046dfb516f209c0}
xmm15 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0},
v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 =
0x00000000000000000000000000000000}
mxcsr 0x1fa0 [ PE IM DM ZM OM UM PM ]
----------
files: tif_soff_size.diff
messages: 13311
priority: normal
status: open
substatus: open
title: ffmpeg crashes on tif files with invalid stripoff sizes
type: patch
________________________________________________
FFmpeg issue tracker <[email protected]>
<https://roundup.ffmpeg.org/issue2515>
________________________________________________
tif_soff_size.diff
Description: Binary data
