libc.so.6 is the only thing that's linked to your binary directly; the
other libraries can't be detected in these ways so you won't see them.
On 6/25/2018 4:30 PM, Michael D. Setzer II wrote:
On 25 Jun 2018 at 15:30, Eli Schwartz wrote:
Subject: Re: Question: Finding libraries that are required for busybox??
To: [email protected]
From: Eli Schwartz <[email protected]>
Date sent: Mon, 25 Jun 2018 15:30:21 -0400
On 06/25/2018 03:20 PM, Jody Bruchon wrote:
By the way, you can also grab the relocations directly from the
binary with this horrific expression (replace the path as needed):
readelf -d /bin/busybox | sed 's/.*\[\([^]]*\)]/\1/'
Scary but effective.
That's some very complicated sed there, and it also doesn't suppress the
non-matched lines with -n, and you could skip several of those escapes
by using -r
Alternatively:
objdump -p /bin/busybox | awk '/NEEDED/{print $2}'
Effective, not scary at all.
--
Eli Schwartz
Bug Wrangler and Trusted User
Thanks for all the quick reponses. Tried the options, but am just seeing a link
to libc.so.6 and no other libraries??
readelf -d /bin/busybox | sed 's/.*\[\([^]]*\)]/\1/'
Dynamic section at offset 0x5cf14 contains 24 entries:
Tag Type Name/Value
libc.so.6
0x0000000c (INIT) 0x804ab90
0x0000000d (FINI) 0x8091d28
0x00000019 (INIT_ARRAY) 0x80a5f0c
0x0000001b (INIT_ARRAYSZ) 4 (bytes)
0x0000001a (FINI_ARRAY) 0x80a5f10
0x0000001c (FINI_ARRAYSZ) 4 (bytes)
0x6ffffef5 (GNU_HASH) 0x80481ac
0x00000005 (STRTAB) 0x8049520
0x00000006 (SYMTAB) 0x8048260
0x0000000a (STRSZ) 2591 (bytes)
0x0000000b (SYMENT) 16 (bytes)
0x00000015 (DEBUG) 0x0
0x00000003 (PLTGOT) 0x80a6000
0x00000002 (PLTRELSZ) 2304 (bytes)
0x00000014 (PLTREL) REL
0x00000017 (JMPREL) 0x804a290
0x00000011 (REL) 0x804a248
0x00000012 (RELSZ) 72 (bytes)
0x00000013 (RELENT) 8 (bytes)
0x6ffffffe (VERNEED) 0x804a198
0x6fffffff (VERNEEDNUM) 1
0x6ffffff0 (VERSYM) 0x8049f40
0x00000000 (NULL) 0x0
objdump -p /bin/busybox | awk '/NEEDED/{print $2}'
libc.so.6
ldd /bin/busybox
linux-gate.so.1 (0xb7f6a000)
libc.so.6 => /lib/libc.so.6 (0xb7d84000)
/lib/ld-linux.so.2 (0xb7f6c000)
ldd /lib/libc.so.6
/lib/ld-linux.so.2 (0xb7f67000)
linux-gate.so.1 (0xb7f65000)
+------------------------------------------------------------+
Michael D. Setzer II - Computer Science Instructor (Retired)
mailto:[email protected]
mailto:[email protected]
Guam - Where America's Day Begins
G4L Disk Imaging Project maintainer
http://sourceforge.net/projects/g4l/
+------------------------------------------------------------+
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