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Crash related to execute_builtin


From: Simon Wörner
Subject: Crash related to execute_builtin
Date: Wed, 11 Jul 2018 15:02:57 +0200
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.9.0

Dear all,
The following crash related to `execute_builtin` was found by a modified
version of the kAFL fuzzer (https://github.com/RUB-SysSec/kAFL).
I have attached the binary and all related crashing inputs grouped by
the last 5 call-stack functions and input, each with a back-trace and
context (containing color).
To reproduce the crash issue, execute the binary of bash with the
crashing input as script (./bash < <crashing_input>).

We can verify all issues for GNU bash, version 4.4.23(2)
(x86_64-unknown-linux-gnu) (git commit
64447609994bfddeef1061948022c074093e9a9f).

Credits: Simon Wörner, Sergej Schumilo, Cornelius Aschermann (all of
Ruhr-Universität Bochum)

Best regards,
Simon Wörner

Attachment: crash-builtin.zip
Description: Zip archive


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