-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
ESB-2007.0060 -- [AIX]
Authentication vulnerability in pop3d, pop3ds, imapd and imapds
29 January 2007
AusCERT Security Bulletin Summary
Operating System: AIX 5.3
Impact: Inappropriate Access
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
IBM SECURITY ADVISORY
First Issued: Fri Jan 26 10:10:13 CST 2007
VULNERABILITY: Authentication vulnerability in pop3d, pop3ds, imapd
PLATFORMS: AIX 5.3.
SOLUTION: Apply the APAR, interim fix or workaround as
THREAT: Remote users can authenticate to pop3d, pop3ds, imapd
and imapds when authentication should be denied.
CERT VU Number: n/a
CVE Number: n/a
An authentication vulnerability has been discovered in pop3d, pop3ds, imapd
and imapds. The vulnerability allows a user to authenticate under
circumstances when authentication should fail. It is possible for a remote
attacker to exploit this vulnerability. Attackers will be able to use these
services as though they successfully authenticated. These daemons ship as
part of the bos.net.tcp.server fileset.
The following table shows the versions of bos.net.tcp.server which are
affected by this vulnerability:
AIX Release Lower Upper
AIX 5.2 n/a n/a
AIX 5.3 22.214.171.124 126.96.36.199
A remote user can authenticate to pop3d, pop3ds, imapd and imapds when
authentication should be denied.
IBM provides the following fixes:
APAR number for AIX 5.3.0: IY93084 (available approx. 03/07/07)
NOTE: Affected customers are urged to upgrade to the latest applicable
B. Interim Fix
Interim fixes are available. The interim fixes can be downloaded via ftp
This is a compressed tarball containing this advisory, interim fix packages
and cleartext PGP signatures for each package.
Verify you have retrieved the fixes intact:
The checksums below were generated using the "sum" and "md5sum" commands
and are as follows:
Filename sum md5
IY93084_03.070111.epkg.Z 30827 2193 f2eaab199ede9f1558f2cdbcb5bf1c4e
IY93084_04.070111.epkg.Z 55091 2198 d9bdd94a06a6644b1e409130e0545237
IY93084_05.070123.epkg.Z 61360 2201 cb24548b7ba7cb80d6c5142de62db092
See the table below to determine which AIX Technology Level a given interim
fix maps to.
These sums should match exactly. The PGP signatures in the compressed
tarball and on this advisory can also be used to verify the integrity of
the various files they correspond to. If the sums or signatures cannot be
confirmed, double check the command results and the download site address.
If those are OK, contact IBM AIX Security at email@example.com
and describe the discrepancy.
The interim fixes include prerequisite checking. This will ensure the
correct mapping between the interim fixes and AIX Technology Levels. The
following table shows the prerequisite fileset levels required for the
fixes above. The levels show are for bos.net.tcp.server.
Interim Fileset Level Fileset Level AIX
Fix (lower level) (upper level) Level
IY93084_03.070111.epkg.Z 188.8.131.52 184.108.40.206 5300-03
IY93084_04.070111.epkg.Z 220.127.116.11 18.104.22.168 5300-04
IY93084_05.070123.epkg.Z 22.214.171.124 126.96.36.199 5300-05
IMPORTANT: If possible, it is recommended that a mksysb backup of the
system is created. Verify it is both bootable, and readable before
Customers may contact IBM support if any issues arise with these interim
Interim Installation Instructions:
These packages use the new Interim Fix Management Solution to install and
manage interim fixes. More information can be found at:
To preview an epkg interim fix installation execute the following command:
# emgr -e ipkg_name -p # where ipkg_name is the name of the
# interim fix package being previewed.
To install an epkg interim fix package, execute the following command:
# emgr -e ipkg_name -X # where ipkg_name is the name of the
# interim fix package being installed.
The "X" flag will expand any filesystems if required.
Disable the daemons if they are not being used.
IV. Obtaining Fixes
AIX Version 5 APARs can be downloaded from:
Security related Interim Fixes can be downloaded from:
V. Contact Information
If you would like to receive AIX Security Advisories via email, please
Comments regarding the content of this announcement can be directed to:
To request the PGP public key that can be used to communicate securely
with the AIX Security Team send email to firstname.lastname@example.org
with a subject of "get key". The key can also be downloaded from a PGP
Public Key Server. The key id is 0x1B14F299.
Please contact your local IBM AIX support center for any assistance.
eServer is a trademark of International Business Machines Corporation.
IBM, AIX and pSeries are registered trademarks of International Business
Machines Corporation. All other trademarks are property of their respective
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.3 (GNU/Linux)
- -----END PGP SIGNATURE-----
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to email@example.com
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: firstname.lastname@example.org
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
-----BEGIN PGP SIGNATURE-----
-----END PGP SIGNATURE-----