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Did you make sure to change ulimit -c away from '0'? (The default) |
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antoine wrote: |
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> I failed to crash any of my test systems with that exploit, hardened or |
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> not. And no-one else seems to have confirmed that it does work. |
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> I can however crash x86_64 systems with another unfixed bug (up to |
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> 2.6.12-rc4). |
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> |
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> Antoine |
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> |
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> On Fri, 2005-05-13 at 15:09 +0100, Pedro Venda wrote: |
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> |
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>>hi everyone, |
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>> |
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>>Has anyone got a clue on how should the proof of concept code behave on |
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>>vulnerable and not vulnerable machines? |
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>> |
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>>On a PaX+grsecurity hardened server, it outputs: |
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>> |
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>>[+] ./elfcd1 argv_start=0xb47b23d4 argv_end=0xb47b23dc ESP: 0xb47b1890 |
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>>[+] phase 1 |
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>>[+] AAAA argv_start=0xb5e0442e argv_end=0xb5e04432 ESP: 0xb5e03930 |
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>>[+] phase2, <RET> to crash Killed |
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>> |
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>>and doesn't core-dump. Also it doesn't warn about the segmentation violation |
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>>process in the logs... |
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>> |
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>>On my laptop, a test server and 2 other workstations (standard 2.6.11.5-8 |
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>>kernels) results are consistent but different from the hardened server: |
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>>pjlv@archon test $ ./elfcd1 |
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>> |
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>>[+] ./elfcd1 argv_start=0xbfffeff7 argv_end=0xbfffefff ESP: 0xbfffedb0 |
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>>[+] phase 1 |
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>>[+] AAAA argv_start=0xbfff6fee argv_end=0xbfff6ff2 ESP: 0xbfff6e80 |
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>>[+] phase 2, <RET> to crash Segmentation fault (core dumped) |
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>> |
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>>and core-dumps. |
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>> |
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>>any help? is the hardened server secure? I suppose so, since it didn't core |
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>>dump. |
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>> |
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>>regards, |
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>>pedro venda. |
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> |
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> |
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Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org |
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tc1hBT+hc2hh85hLjJJ605Y= |
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=xtdv |
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