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UnixWare 7.1.4 UnixWare 7.1.3 : ppp buffer overflow Oct 20 2005 10:46PM
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SCO Security Advisory

Subject: UnixWare 7.1.4 UnixWare 7.1.3 : ppp buffer overflow
Advisory number: SCOSA-2005.41
Issue date: 2005 October 20
Cross reference: sr894991 fz532994 erg712940 CAN-2005-2927
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1. Problem Description

iDEFENSE has identified a Buffer Overflow vulnerability in
SCO Unixware ppp prompt. Local exploitation of a buffer
overflow vulnerability in the ppp binary, allows attackers
to gain root privileges.

This could lead to the execution of arbitrary code with root
privileges, as ppp is setuid root by default.

The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the following name CAN-2005-2927 to this issue.

2. Vulnerable Supported Versions

System Binaries
----------------------------------------------------------------------
UnixWare 7.1.4 /usr/bin/ppptalk
UnixWare 7.1.3 /usr/bin/ppptalk

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-2005.41

4.2 Verification

MD5 (erg712940.uw714.pkg.Z) = d47a9958e6dfd44c9b95e1d9489011f4

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 erg712940.uw714.pkg.Z to the /var/spool/pkg directory

# uncompress /var/spool/pkg/erg712940.uw714.pkg.Z
# pkgadd -d /var/spool/pkg/erg712940.uw714.pkg

5. UnixWare 7.1.3

5.1 Location of Fixed Binaries

ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.41

5.2 Verification

MD5 (erg712940.uw713.pkg.Z) = 474799fc2cda9db5c486880599e1cdcc

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 erg712940.uw713.pkg.Z to the /var/spool/pkg directory

# uncompress /var/spool/pkg/erg712940.uw713.pkg.Z
# pkgadd -d /var/spool/pkg/erg712940.uw713.pkg

6. References

Specific references for this advisory:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2927

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 sr894991 fz532994
erg712940.

7. 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.

8. Acknowledgments

The SCO Group would like to thank iDefense for discovering and
reporting this weakness.

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