Date: Thu, 13 Dec 2012 07:52:26 +0530 From: Dhiru Kholia <dhiru.kholia@...il.com> To: john-dev@...ts.openwall.com Subject: Re: krb5pa-sha1 crash On Thu, Dec 13, 2012 at 3:25 AM, magnum <john.magnum@...hmail.com> wrote: > Still can't reproduce. Are you running 32-bit? Make a debug build, throw it at gdb and tell me where it crashed. I am using 64-bit Linux and I am able to reproduce the crash every time. However, turning on debugging makes the crash go away. ✗ cat crashing-hash AD.EXAMPLE.COMaduser:$krb5pa$18$AD.EXAMPLE.COMaduser$ad$AD.EXAMPLE.COMaduser$64dfeee04be2b2e0423814e0df4d0f960885aca4efffe6cb5694c4d34690406071c4968abd2c153ee42d258c5e09a41269bbcd7799f478d3 Clang's asan crashes too but at a strange location. ERROR: AddressSanitizer stack-buffer-overflow on address 0x7fff50cf4ff7 at pc 0x4cdcad bp 0x7fff50cf4cd0 sp 0x7fff50cf4cc8 WRITE of size 1 at 0x7fff50cf4ff7 thread T0 #0 0x4cdcad in hmac_sha1_data /home/dsk/JohnTheRipper/src/gladman_hmac.c:87 Address 0x7fff50cf4ff7 is located at offset 567 in frame <derive_key> of T0's stack: This frame has 5 object(s): [32, 52) 'uu' [96, 116) 'ux' [160, 324) 'c1' [384, 548) 'c2' [608, 772) 'c3' Fixing this overflow might not (or might) solve the original problem. -- Cheers, Dhiru
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