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665 Commits

Author SHA1 Message Date
John Reiser
937ae4c5e0 Avoid crash on outrageous fuzzed input 
https://github.com/upx/upx/issues/828
	modified:   p_lx_elf.cpp
 2024-06-04 15:43:11 -07:00
Markus F.X.J. Oberhumer
3495d1affd all: minor cleanups 2024-05-28 10:26:39 +02:00
John Reiser
57763ca1e2 ELF stubs: go_lang different placement of DT_STRTAB, DT_SYMTAB 
https://github.com/upx/upx/issues/825
	modified:   p_lx_elf.cpp
 2024-05-21 17:14:21 -07:00
Markus F.X.J. Oberhumer
40b7e24fcc src: introduce upx::max and friends; updates for clang-19 git snapshot 2024-05-15 14:06:05 +02:00
RainRat
62265a1bc9 fix typos 2024-05-07 01:41:41 -07:00
John Reiser
4c32a8e3d4 Fix attempted recovery from corrupted b_info 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=66271&q=label%3AProj-upx
	modified:   p_lx_elf.cpp
 2024-05-04 10:35:39 -07:00
John Reiser
548227a55b mb_dt_offsets.clear() prevents undef from corrupted input 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=66344&q=label%3AProj-upx
	modified:   p_lx_elf.cpp
 2024-05-04 09:56:34 -07:00
John Reiser
811f66de84 Check gnu_shift during unpack 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=66273&q=label%3AProj-upx
	modified:   p_lx_elf.cpp
 2024-05-04 09:05:48 -07:00
John Reiser
0e6cef99a0 Guard against empty PT_NOTE 
https://github.com/upx/upx/issues/817
	modified:   p_lx_elf.cpp
 2024-05-01 10:09:52 -07:00
John Reiser
80e22a7e38 Fix --preserve-build-id 
https://github.com/upx/upx/issues/815
	modified:   p_lx_elf.cpp
 2024-04-27 08:21:48 -07:00
John Reiser
3949af6d3c Unpacking detects and defends against malicious ELF 2024-03-28 07:48:55 -07:00
Markus F.X.J. Oberhumer
839a78f2e0 Better fix for previous commit to avoid out-of-bounds pointer. 2024-02-27 11:20:29 +01:00
John Reiser
680ce0a7af find_dt_ndx defends against overrun 
https://github.com/upx/upx/issues/790
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=66344&q=label%3AProj-upx
	modified:   p_lx_elf.cpp
 2024-02-26 14:32:02 -08:00
John Reiser
25aa0e2e46 un_asl_dynsym() should skip when !dynstr 
https://github.com/upx/upx/issues/785
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=66302
	modified:   p_lx_elf.cpp
 2024-02-08 19:32:03 -08:00
John Reiser
d429801498 Avoid &file_image[file_size] because some Standards object 
modified:   p_lx_elf.cpp
 2024-02-01 11:41:04 -08:00
John Reiser
dff3766501 Detect too-large bit-shift in elf_lookup of DT_GNUHASH 
https://github.com/upx/upx/issues/782
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65776
	modified:   p_lx_elf.cpp
 2024-01-27 13:38:25 -08:00
John Reiser
ac72c02793 check nbucket earlier in DT_HASH on ELF 
https://github.com/upx/upx/issues/780
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=66079
	modified:   p_lx_elf.cpp
 2024-01-27 11:42:25 -08:00
John Reiser
69c51eee4d better checking of DT_STRSZ for ELF 
https://github.com/upx/upx/issues/779
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=66064
	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
 2024-01-27 11:11:07 -08:00
John Reiser
ff5a4eeb96 ELF versus --brute: addStubEntrySections() needs ph_forced_method() 
https://github.com/upx/upx/issues/770
	modified:   p_lx_elf.cpp
 2024-01-25 17:17:32 -08:00
John Reiser
b48f870701 Detect circular DT_HASH and DT_GNUHASH lookup 
https://github.com/upx/upx/issues/775
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65811&q=label%3AProj-upx
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65840&q=label%3AProj-upx
 2024-01-25 15:05:53 -08:00
John Reiser
10807ebdc2 Unpack 8-byte b_info only if (ph.version <= 11): 2001 or earlier 
*x86 only: .e_entry too low
https://github.com/upx/upx/issues/774
	modified:   p_lx_elf.cpp
 2024-01-25 09:06:46 -08:00
John Reiser
d615985b8a elf_find_table_size() did not check for empty table 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65765&q=label%3AProj-upx
https://github.com/upx/upx/issues/771
	modified:   p_lx_elf.cpp
 2024-01-18 19:11:12 -08:00
John Reiser
d3e780d617 Unpacking ELF requires e_phnum at least 2 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65535
https://github.com/upx/upx/issues/763
	modified:   p_lx_elf.cpp
 2024-01-10 14:07:58 -08:00
John Reiser
d549c2b5c9 More care when recovering from slid b_info 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65531
https://github.com/upx/upx/issues/762
	modified:   p_lx_elf.cpp
 2024-01-10 13:38:18 -08:00
John Reiser
553fc9b1fb invert_pt_dynamic: Compilers differ, unsigned vs. signed 
modified:   p_lx_elf.cpp
 2024-01-10 10:33:33 -08:00
John Reiser
3dca1175e5 invert_pt_dynamic() needs better checking for malformed input 
https://github.com/upx/upx/issues/759
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65510
	modified:   p_lx_elf.cpp
 2024-01-10 09:41:12 -08:00
Markus F.X.J. Oberhumer
47fc230893 all: welcome 2024 2024-01-03 17:47:25 +01:00
John Reiser
ed2633bf95 Honor .p_align <= 64K; else assume 4K is also available 
https://github.com/upx/upx/issues/737
	modified:   p_lx_elf.cpp
 2023-11-26 11:46:12 -08:00
Markus F.X.J. Oberhumer
4f0f977f04 CI updates and cleanups 2023-11-03 17:52:46 +01:00
Markus F.X.J. Oberhumer
e964d4acf3 src/util: change TriBool logic to use a bool template parameter 2023-10-31 12:24:44 +01:00
John Reiser
d6d5e7ae3d For Android emulator: align i386 LEXEC020 binfo 
modified:   src/stub/src/i386-linux.elf-entry.S
	modified:   src/p_lx_elf.cpp

	modified:   src/stub/i386-linux.elf-entry.h
	modified:   misc/testsuite/upx_testsuite_1-expected_sha256sums.sh
 2023-09-28 12:02:28 -07:00
John Reiser
854988bc5f Detect AlreadyPacked even when trailing PackHeader has been lopped. 
This is heuristic, but strong.
https://github.com/upx/upx/issues/712
	modified:   p_lx_elf.cpp
	modified:   p_unix.h
 2023-09-21 14:12:18 -07:00
Markus F.X.J. Oberhumer
62dbf8485f src: sort cleanups 2023-09-04 07:28:48 +02:00
John Reiser
b526eed346 Detect "no Shdrs" earlier when already packed 
https://github.com/upx/upx/issues/699
	modified:   p_lx_elf.cpp
 2023-08-23 19:52:35 +02:00
John Reiser
59c6a71b72 More use of ph_forced_method() 
modified:   p_lx_elf.cpp
 2023-08-23 19:52:35 +02:00
John Reiser
bfb5ea50a9 Temporary 
modified:   p_lx_elf.cpp
 2023-08-23 19:52:35 +02:00
John Reiser
149d84edca --brute versus forced_method(ph.method) 
https://github.com/upx/upx/issues/694  (partial)
	modified:   p_lx_elf.cpp
 2023-08-23 19:52:35 +02:00
Markus F.X.J. Oberhumer
b9bf81d548 src/p_lx_elf.cpp: init o_binfo to avoid crash with MSAN build 
This should be double-checked by @jreiser
 2023-08-16 22:23:28 +02:00
Markus F.X.J. Oberhumer
a9ac4b5e23 src: introduce type tribool 2023-08-15 14:44:50 +02:00
Markus F.X.J. Oberhumer
777d4f5279 src: refactoring: create packhead.h and move some methods 2023-08-11 03:57:20 +02:00
Markus F.X.J. Oberhumer
757401dd0c CI and spell checks 2023-08-09 13:08:38 +02:00
John Reiser
75e153dd99 More care in ::forward_Shdrs() and ::pack4() 
Also, de-compressing arm64 shlib restores .init_array[0],
although supposedly *_RELATIVE relocation should overwrite.

https://github.com/upx/upx/issues/693
	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
 2023-08-04 11:52:58 -07:00
John Reiser
3a16d4a12e Spell check; No-Functional-Change 
modified:   p_lx_elf.cpp
 2023-07-31 06:06:31 -07:00
John Reiser
41e9f7985f forward_Shdrs: elfout for main, lowmem for shlib 
Especially Android.
https://github.com/upx/upx/issues/680
	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
 2023-07-29 13:43:33 -07:00
John Reiser
905bfacf44 Pacify clang-tidy 2023-07-26 17:21:39 -07:00
Markus F.X.J. Oberhumer
053e95033f all: improve C++ static analyzers 2023-07-26 22:28:47 +02:00
John Reiser
745fef7425 fpad4, fpad8, and _Shdr hacking should guard against (!fo) 
Also pacify some clang scan-build complaints.
	modified:   p_lx_elf.cpp
 2023-07-26 07:27:12 -07:00
John Reiser
c9d625a237 Use 'elfout' for changing ElfXX_Ehdr 
https://github.com/upx/upx/issues/688
	modified:   p_lx_elf.cpp
 2023-07-26 07:15:22 +02:00
John Reiser
2684e815e0 Fix use of memfd_create for shlib stubs, espcially Android 
Also relocation of init_array[0] for Elf32 shlib.
        https://github.com/upx/upx/issues/220
        https://github.com/upx/upx/issues/609
        https://github.com/upx/upx/issues/680

	modified:   stub/src/amd64-linux.elf-so_main.c
	modified:   stub/src/i386-linux.elf-so_main.c
	modified:   p_lx_elf.cpp

	modified:   stub/src/arm.v4a-linux.elf-so_fold.S
	modified:   stub/src/arm64-linux.elf-so_entry.S
	modified:   stub/src/arm64-linux.elf-so_fold.S
	modified:   stub/src/i386-linux.elf-so_fold.S

	modified:   stub/amd64-linux.elf-so_fold.h
	modified:   stub/arm.v4a-linux.elf-so_fold.h
	modified:   stub/arm.v5a-linux.elf-so_fold.h
	modified:   stub/arm64-linux.elf-so_entry.h
	modified:   stub/arm64-linux.elf-so_fold.h
	modified:   stub/i386-linux.elf-so_fold.h
	modified:   stub/tmp/amd64-linux.elf-so_fold.bin.dump
 2023-07-26 07:15:22 +02:00
John Reiser
672d69c68a Fix unpacking of upx-3.94-armeb_linux/upx 
Getting past the code of the stub must deal with variances
between released versions.
	modified:   p_lx_elf.cpp
 2023-07-18 16:56:39 -07:00