URL:
<https://savannah.gnu.org/bugs/?57937>
Summary: Heap Buffer overflow in MWrapChar
Project: GNU Screen
Submitted by: hanno
Submitted on: Mon 02 Mar 2020 01:01:51 PM CET
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Release: None
Discussion Lock: Any
Fixed Release: None
Planned Release: None
Work Required: None
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Details:
With an ASAN-compiled screen I observed a heap overflow.
This seems to happen if there is some output of the screen and the window is
resized. I was able to reproduce this by doing a cat /dev/urandom within a
screen in a GUI terminal and then resizing the window for a while in random
movement.
ASAN detects a 1 byte heap overflow in MWrapChar, log attached.
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File Attachments:
-------------------------------------------------------
Date: Mon 02 Mar 2020 01:01:51 PM CET Name: screen-asan.txt Size: 3KiB By:
hanno
asan stack trace
<http://savannah.gnu.org/bugs/download.php?file_id=48531>
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