OpenPKG Information for VU#993452

Sendmail fails to appropriately initialize data structures for DNS maps

Status

Affected

Vendor Statement

Please see the vendor statement for VU#993452 at:

http://www.openpkg.org/security/OpenPKG-SA-2003.037-sendmail.html

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References

None

Addendum

Text of statement for VU#993452 follows:

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________________________________________________________________________

OpenPKG Security Advisory                            The OpenPKG Project
http://www.openpkg.org/security.html              http://www.openpkg.org
openpkg-security@openpkg.org                         openpkg@openpkg.org
OpenPKG-SA-2003.037                                          28-Aug-2003
________________________________________________________________________

Package:             sendmail
Vulnerability:       Denial of Service
OpenPKG Specific:    no

Affected Releases:   Affected Packages:        Corrected Packages:
OpenPKG CURRENT      none                      N.A.
OpenPKG 1.3          none                      N.A.
OpenPKG 1.2          <= sendmail-8.12.7-1.2.2  >= sendmail-8.12.7-1.2.3

Dependent Packages:  none

Description:
Oleg Bulyzhin reported to FreeBSD [1] a confirmed [2] Denial of
Service (DoS) vulnerability in all version of the Sendmail MTA [0]
earlier than 8.12.9. Due to a wrong initialization of an internal
structure, if Sendmail gets a bad DNS reply (with actual reply size
not equal the announced reply size), it later calls free() on a random
address. This usually cause Sendmail to crash.


Please check whether you are affected by running "<prefix>/bin/rpm
-q sendmail". If you have the "sendmail" package installed and its
version is affected (see above), we recommend that you immediately
upgrade it (see Solution). [3][4]


Solution:
Select the updated source RPM appropriate for your OpenPKG release
[5], fetch it from the OpenPKG FTP service [6] or a mirror location,
verify its integrity [7], build a corresponding binary RPM from it [3]
and update your OpenPKG installation by applying the binary RPM [4].
For the affected release OpenPKG 1.2, perform the following operations
to permanently fix the security problem (for other releases adjust
accordingly).


$ ftp ftp.openpkg.org
ftp> bin
ftp> cd release/1.2/UPD
ftp> get sendmail-8.12.7-1.2.3.src.rpm
ftp> bye
$ <prefix>/bin/rpm -v --checksig sendmail-8.12.7-1.2.3.src.rpm
$ <prefix>/bin/rpm --rebuild sendmail-8.12.7-1.2.3.src.rpm
$ su -
# <prefix>/bin/rpm -Fvh <prefix>/RPM/PKG/sendmail-8.12.7-1.2.3.*.rpm

________________________________________________________________________

References:
[0]
http://www.sendmail.org/
[1]
http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/54367
[2]
http://www.sendmail.org/dnsmap1.html
[3]
http://www.openpkg.org/tutorial.html#regular-source
[4]
http://www.openpkg.org/tutorial.html#regular-binary
[5]
ftp://ftp.openpkg.org/release/1.2/UPD/sendmail-8.12.7-1.2.3.src.rpm
[6]
ftp://ftp.openpkg.org/release/1.2/UPD/
[7]
http://www.openpkg.org/security.html#signature
________________________________________________________________________

For security reasons, this advisory was digitally signed with the
OpenPGP public key "OpenPKG <openpkg@openpkg.org>" (ID 63C4CB9F) of the
OpenPKG project which you can retrieve from
http://pgp.openpkg.org and
hkp://pgp.openpkg.org. Follow the instructions on
http://pgp.openpkg.org/
for details on how to verify the integrity of this advisory.
________________________________________________________________________

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