From: Szabolcs Nagy <nsz@port70.net>
To: Konstantin Serebryany <konstantin.s.serebryany@gmail.com>,
Rich Felker <dalias@libc.org>,
musl@lists.openwall.com
Subject: Re: buffer overflow in regcomp and a way to find more of those
Date: Sat, 21 Mar 2015 22:38:25 +0100 [thread overview]
Message-ID: <20150321213825.GK16260@port70.net> (raw)
In-Reply-To: <20150321210302.GJ16260@port70.net>
* Szabolcs Nagy <nsz@port70.net> [2015-03-21 22:03:02 +0100]:
...
> r12 0x10 16
> r13 0x7 7
> r14 0x6e2dc3 7220675
> r15 0x1 1
> rip 0x47a05b 0x47a05b <inet_pton+1307>
> eflags 0x10202 [ IF RF ]
> cs 0x33 51
> ss 0x2b 43
> ds 0x0 0
> es 0x0 0
> fs 0x63 99
> gs 0x0 0
> (gdb) p (char*)0x6e2dc3
> $3 = 0x6e2dc3 "2.8288;3:33::2.82.83333"
> (gdb)
ah.. r14 is incremented as the string is parsed
the original string is
(gdb) p (char*)0x6e2dc3-35
$37 = 0x6e2da0 "8:a:2:8:3:28:8::2:83:20:8:2:833:23:2.8288;3:33::2.82.83333"
with this i can reproduce the crash
next prev parent reply other threads:[~2015-03-21 21:38 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-20 20:17 Konstantin Serebryany
2015-03-20 20:40 ` Rich Felker
2015-03-20 21:28 ` Szabolcs Nagy
2015-03-20 23:48 ` Szabolcs Nagy
2015-03-20 22:32 ` Rich Felker
2015-03-20 23:52 ` Szabolcs Nagy
2015-03-21 0:06 ` Konstantin Serebryany
2015-03-21 0:26 ` Szabolcs Nagy
2015-03-21 0:46 ` Rich Felker
2015-03-21 0:54 ` Konstantin Serebryany
2015-03-21 1:00 ` Rich Felker
2015-03-21 1:05 ` Konstantin Serebryany
2015-03-21 1:10 ` Konstantin Serebryany
2015-03-21 1:23 ` Szabolcs Nagy
2015-03-21 1:30 ` Rich Felker
2015-03-21 2:10 ` Szabolcs Nagy
2015-03-21 2:17 ` Rich Felker
2015-03-21 1:32 ` Rich Felker
2015-03-21 1:37 ` Konstantin Serebryany
2015-03-21 1:56 ` Rich Felker
2015-03-21 2:14 ` Konstantin Serebryany
2015-03-21 2:20 ` Rich Felker
2015-03-21 6:05 ` Konstantin Serebryany
2015-03-21 13:28 ` Szabolcs Nagy
2015-03-21 21:03 ` Szabolcs Nagy
2015-03-21 21:38 ` Szabolcs Nagy [this message]
2015-03-21 22:13 ` Szabolcs Nagy
2015-03-22 6:36 ` Justin Cormack
2015-03-23 5:02 ` Konstantin Serebryany
2015-03-23 12:25 ` Szabolcs Nagy
2015-03-23 15:56 ` Konstantin Serebryany
2015-03-23 4:55 ` Konstantin Serebryany
2015-03-23 12:35 ` Szabolcs Nagy
2015-03-23 14:40 ` stephen Turner
2015-03-23 14:53 ` Szabolcs Nagy
2015-03-23 15:46 ` stephen Turner
2015-03-23 16:28 ` Rich Felker
2015-03-23 17:21 ` Nathan McSween
2015-03-28 22:00 ` Szabolcs Nagy
2015-03-28 22:32 ` Konstantin Serebryany
2015-03-28 22:38 ` Rich Felker
2015-03-28 23:15 ` Szabolcs Nagy
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