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SCO Security Advisory

Subject: UnixWare 7.1.4 UnixWare 7.1.3 UnixWare 7.1.1 : CDE dtlogin unspecified double free
Advisory number: SCOSA-2005.18
Issue date: 2005 April 7
Cross reference: sr890079 fz529303 erg712592 CAN-2004-0368 CERT VU#179804
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1. Problem Description

The Common Desktop Environment (CDE) dtlogin utility is
used to log into a CDE session. The CDE dtlogin utility has
a double-free vulnerability in the X Display Manager Control
Protocol (XDMCP). By sending a specially-crafted XDMCP
packet to a vulnerable system, a remote attacker could
obtain sensitive information, cause a denial of service or
execute arbitrary code on the system.

CERT Vulnerability Note VU#179804, Common Desktop Environment
(CDE) dtlogin improperly deallocates memory at
http://www.kb.cert.org/vuls/id/179804.

The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CAN-2004-0368 to this issue.

2. Vulnerable Supported Versions

System Binaries
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UnixWare 7.1.4 /usr/dt/bin/dtgreet
/usr/dt/bin/dtlogin
/usr/dt/lib/libDtLogin.so.1

UnixWare 7.1.3 /usr/dt/bin/dtgreet
/usr/dt/bin/dtlogin
/usr/dt/lib/libDtLogin.so.1

UnixWare 7.1.1 See Maintenance Pack 5 notes


3. Solution

The proper solution is to install the latest packages.

4. UnixWare 7.1.4

4.1 Location of Fixed Binaries

ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.18

4.2 Verification

MD5 (erg712592.pkg.Z) = d3714b22a624db25740f5539c063d407

md5 is available for download from
ftp://ftp.sco.com/pub/security/tools

4.3 Installing Fixed Binaries

Upgrade the affected binaries with the following sequence:

Download erg712592.pkg.Z to the /var/spool/pkg directory

# uncompress /var/spool/pkg/erg712592.pkg.Z
# pkgadd -d /var/spool/pkg/erg712592.pkg

5. UnixWare 7.1.3

5.1 Location of Fixed Binaries

ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.18

5.2 Verification

MD5 (erg712592.713.pkg.Z) = fc8d0c4f0ebdcf65504d1b4985c7ba52

md5 is available for download from
ftp://ftp.sco.com/pub/security/tools

5.3 Installing Fixed Binaries

Upgrade the affected binaries with the following sequence:

Download erg712592.713.pkg.Z to the /var/spool/pkg directory

# uncompress /var/spool/pkg/erg712592.713.pkg.Z
# pkgadd -d /var/spool/pkg/erg712592.713.pkg

6. UnixWare 7.1.1 uw711mp5

6.1 Location of Fixed Binaries

The fixes are available in SCO UnixWare Release 7.1.1
Maintenance Pack 5 or later. See

ftp://ftp.sco.com/pub/unixware7/uw711pk/uw711mp5.txt
and
ftp://ftp.sco.com/pub/unixware7/uw711pk/uw711mp5_errata.txt

6.2 Verification

MD5 (uw711mp5.cpio.Z) = 50bd66b7d57b2025da9dca4010d0ab1a

md5 is available for download from
ftp://ftp.sco.com/pub/security/tools

6.3 Installing Fixed Binaries

See uw711mp5.txt and uw711mp5_errata.txt for install instructions.

7. References

Specific references for this advisory:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0368

SCO security resources:
http://www.sco.com/support/security/index.html

SCO security advisories via email
http://www.sco.com/support/forums/security.html

This security fix closes SCO incidents sr890079 fz529303
erg712592.

8. Disclaimer

SCO is not responsible for the misuse of any of the information
we provide on this website and/or through our security
advisories. Our advisories are a service to our customers
intended to promote secure installation and use of SCO
products.

9. Acknowledgments

SCO would like to thank Dave Aitel

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