[Bug gas/23054] New: Multiple memory corruption in as-new (binuitils-2.30-15ubuntu1)

[sergej at schumilo dot de]

https://sourceware.org/bugzilla/show_bug.cgi?id=23054

            Bug ID: 23054
           Summary: Multiple memory corruption in as-new
                    (binuitils-2.30-15ubuntu1)
           Product: binutils
           Version: 2.30
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: sergej at schumilo dot de
  Target Milestone: ---

Created attachment 10942
  --> https://sourceware.org/bugzilla/attachment.cgi?id=10942&action=edit
as-new executable, ASAN reports and crashing inputs

Dear all,
after reporting the following bugs to the Ubuntu security team
(https://bugs.launchpad.net/ubuntu/+source/binutils/+bug/1763096), we were ask
to report them directly to the binutils developers: 

----------------------------------------------------

Dear all,
The following binutils as-new memory corruptions were found by a modified
version of the kAFL fuzzer (https://github.com/RUB-SysSec/kAFL). I have
attached the crashing inputs and each ASAN report.

Steps to reproduce:

Build current verison of binutils:
```
pull-lp-source binutils
cd binutils-2.30
CC=clang CXX=clang++ CFLAGS="-fsanitize=address -fsanitize-recover=address
-ggdb" CXXFLAGS="-fsanitize=address -fsanitize-recover=address -ggdb"
LDFLAGS="-fsanitize=address" ./configure
CC=clang CXX=clang++ CFLAGS="-fsanitize=address -fsanitize-recover=address
-ggdb" CXXFLAGS="-fsanitize=address
-fsanitize-recover=address -ggdb" LDFLAGS="-fsanitize=address" make
```

run inputs under ASAN:

```
ASAN_OPTIONS=halt_on_error=false:allow_addr2line=true ./as-new $file
```

We can verify those issues for as-new binuitils-2.30-15ubuntu1 (Ubuntu 16.04.4
LTS / sources from "pull-lp-source bintuils").

Credits: Sergej Schumilo, Cornelius Aschermann (both of Ruhr-Universität
Bochum)

Best regards,
Sergej Schumilo

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