Bug 212056 - (CVE-2006-4573) CVE-2006-4573 screen buffer overflow
CVE-2006-4573 screen buffer overflow
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
low Severity low
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Assigned To: Marcela Mašláňová
Brock Organ
: Security
Depends On:
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Reported: 2006-10-24 15:41 EDT by Josh Bressers
Modified: 2011-08-02 14:32 EDT (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2007-08-09 11:12:00 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Josh Bressers 2006-10-24 15:41:34 EDT
From the screen-users mailing list:

    I've just released screen-4.0.3. This is not the promised next version
    with vertical split and other cool things, but just a security release
    that fixes two bugs in the utf8 combining characters handling. The
    bugs could be used to crash/hang screen by writing a special string
    to a window.

    The fixed version is (as usual) available via:


    Credits go to cstone & Rich Felker for finding the bugs.

Kees Cook of Ubuntu analysed this issue and determined that it's likely an
exploitable issue, but it's non trivial to exploit.  This will require a fair
amount of user interaction to exploit, thus the low severity.

This issue also likely affects RHEL2.1 and RHEL3
Comment 2 Marcela Mašláňová 2006-12-11 07:38:30 EST
Solved in rawhide.
Comment 3 Marcela Mašláňová 2007-03-28 07:07:25 EDT
New version, fix bugs from comment#1
Comment 4 Marcela Mašláňová 2007-08-09 11:12:00 EDT
Please update on screen-4.0.3 and higher.
Comment 5 Josh Bressers 2011-08-02 14:32:12 EDT

Red Hat no longer plans to fix this issue in Red Hat Enterprise Linux 4.

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