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Redhat: 'ncurses' vulnerabilty Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
RedHat Linux If you are any setuid applications that use ncurses and its cursor movementfunctionality, local users may gain access to the program's privileges.

---------------------------------------------------------------------
                   Red Hat, Inc. Security Advisory

Synopsis:          New ncurses packages fixing buffer overrun available
Advisory ID:       RHSA-2000:115-02
Issue date:        2000-11-23
Updated on:        2000-11-26
Product:           Red Hat Linux
Keywords:          ncurses buffer overrun exploit setuid
Cross references:  N/A
---------------------------------------------------------------------

1. Topic:

If you are any setuid applications that use ncurses and its cursor movement
functionality, local users may gain access to the program's privileges.

2000-11-27: Added packages for Red Hat Linux 7 for Alpha

2. Relevant releases/architectures:

Red Hat Linux 6.2 - i386, alpha, sparc
Red Hat Linux 6.2EE - i386, alpha, sparc
Red Hat Linux 7.0 - i386, alpha

3. Problem description:

There used to be an overflowable buffer in the part of the ncurses library handling cursor movement.

Attackers can force a privileged application to use their own termcap file
containing a special terminal entry which will trigger the ncurses
vulnerability, allowing them to execute arbitrary code with the privileges
of the exploited binary.

4. Solution:

For each RPM for your particular architecture, run:

rpm -Fvh [filename]

where filename is the name of the RPM.

5. Bug IDs fixed  (http://bugzilla.Red Hat.com/bugzilla for more info):

20809 - ncurses allows local privilege escalation

6. RPMs required:

Red Hat Linux 6.2:

alpha: 
ftp://updates.Red Hat.com/6.2/alpha/ncurses-5.0-12.alpha.rpm 
ftp://updates.Red Hat.com/6.2/alpha/ncurses-devel-5.0-12.alpha.rpm

sparc: 
ftp://updates.Red Hat.com/6.2/sparc/ncurses-5.0-12.sparc.rpm 
ftp://updates.Red Hat.com/6.2/sparc/ncurses-devel-5.0-12.sparc.rpm

i386: 
ftp://updates.Red Hat.com/6.2/i386/ncurses-5.0-12.i386.rpm 
ftp://updates.Red Hat.com/6.2/i386/ncurses-devel-5.0-12.i386.rpm

sources: 
ftp://updates.Red Hat.com/6.2/SRPMS/ncurses-5.0-12.src.rpm

Red Hat Linux 7.0:

alpha: 
ftp://updates.Red Hat.com/7.0/alpha/ncurses-5.2-2.alpha.rpm 
ftp://updates.Red Hat.com/7.0/alpha/ncurses-devel-5.2-2.alpha.rpm

i386: 
ftp://updates.Red Hat.com/7.0/i386/ncurses-5.2-2.i386.rpm 
ftp://updates.Red Hat.com/7.0/i386/ncurses-devel-5.2-2.i386.rpm

sources: 
ftp://updates.Red Hat.com/7.0/SRPMS/ncurses-5.2-2.src.rpm

7. Verification:

MD5 sum                           Package Name
--------------------------------------------------------------------------
268df5613b61b146b8cae1c59369c0b7  6.2/SRPMS/ncurses-5.0-12.src.rpm
1decbd07374fd9fb7ae5a12641d2667b  6.2/alpha/ncurses-5.0-12.alpha.rpm
ed52d2bad06cee2cec081bb889a5e363  6.2/alpha/ncurses-devel-5.0-12.alpha.rpm
d401a0317132c114a75dfeefb881f66c  6.2/i386/ncurses-5.0-12.i386.rpm
bc84ee23b1b8f960a0911a5388c52d24  6.2/i386/ncurses-devel-5.0-12.i386.rpm
654eca10b3b44afef783c39da3b254dc  6.2/sparc/ncurses-5.0-12.sparc.rpm
e273dd6e88899781bcc7441e7505de5c  6.2/sparc/ncurses-devel-5.0-12.sparc.rpm
4444a46c15c28db246b191daf4f3dfde  7.0/SRPMS/ncurses-5.2-2.src.rpm
64d008bc67646bc54c3b94b84a0c63fe  7.0/alpha/ncurses-5.2-2.alpha.rpm
b2b05f687584244fd0a33583d7684b25  7.0/alpha/ncurses-devel-5.2-2.alpha.rpm
9affe6c75ae33d616ea695766c10e44e  7.0/i386/ncurses-5.2-2.i386.rpm
a555ec460de5650c4a2c42abc5de838c  7.0/i386/ncurses-devel-5.2-2.i386.rpm

These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at:
     http://www.Red Hat.com/corp/contact.html

You can verify each package with the following command:
    rpm --checksig  

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
    rpm --checksig --nogpg 

8. References:

N/A


Copyright(c) 2000 Red Hat, Inc.


 
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