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UNIRAS Brief - 415/06 - Three Gentoo Linux Security Advisories:
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UNIRAS (UK Govt CERT) Briefing Notice - 415/06 dated 16.06.06 Time: 11:45
UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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UNIRAS material is also available from its website at www.uniras.gov.uk and
Information about NISCC is available from www.niscc.gov.uk
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Title
=====
Three Gentoo Linux Security Advisories:
1. GLSA 200606-17 - OpenLDAP: Buffer overflow
2. GLSA 200606-18 - PAM-MySQL: Multiple vulnerabilities
3. GLSA 200606-19 - Sendmail: Denial of Service
Detail
======
1. slurpd contains a buffer overflow when reading very long hostnames from
the status file.
2. A flaw in handling the result of pam_get_item() as well as further
unspecified flaws were discovered in PAM-MySQL.
3. Frank Sheiness discovered that the mime8to7() function can recurse
endlessly during the decoding of multipart MIME messages until the
stack of the process is filled and the process crashes.
1.
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Gentoo Linux Security Advisory GLSA 200606-17
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http://security.gentoo.org/
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Severity: Normal
Title: OpenLDAP: Buffer overflow
Date: June 15, 2006
Bugs: #134010
ID: 200606-17
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Synopsis
========
The OpenLDAP replication server slurpd contains a buffer overflow that
could result in arbitrary code execution.
Background
==========
OpenLDAP is a suite of LDAP-related applications and development tools.
It includes slapd (the standalone LDAP server), slurpd (the standalone
LDAP replication server), various LDAP libraries, utilities and example
clients.
Affected packages
=================
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Package / Vulnerable / Unaffected
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1 net-nsd/openldap < 2.3.22 >= 2.3.22
Description
===========
slurpd contains a buffer overflow when reading very long hostnames from
the status file.
Impact
======
By injecting an overly long hostname in the status file, an attacker
could possibly cause the execution of arbitrary code with the
permissions of the user running slurpd.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All openLDAP users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-nds/openldap-2.3.22"
References
==========
[ 1 ] CVE-2006-2754
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2754
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200606-17.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@xxxxxxxxxx or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
2.
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Gentoo Linux Security Advisory GLSA 200606-18
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http://security.gentoo.org/
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Severity: Normal
Title: PAM-MySQL: Multiple vulnerabilities
Date: June 15, 2006
Bugs: #120842
ID: 200606-18
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Synopsis
========
Vulnerabilities in PAM-MySQL can lead to a Denial of Service, making it
impossible to log into a machine.
Background
==========
PAM-MySQL is a PAM module used to authenticate users against a MySQL
backend.
Affected packages
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-auth/pam_mysql < 0.7_rc1 >= 0.7_rc1
Description
===========
A flaw in handling the result of pam_get_item() as well as further
unspecified flaws were discovered in PAM-MySQL.
Impact
======
By exploiting the mentioned flaws an attacker can cause a Denial of
Service and thus prevent users that authenticate against PAM-MySQL from
logging into a machine. There is also a possible additional attack
vector with more malicious impact that has not been confirmed yet.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All PAM-MySQL users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-auth/pam_mysql-0.7_rc1"
References
==========
[ 1 ] Official release information
http://pam-mysql.sourceforge.net/News/
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200606-18.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@xxxxxxxxxx or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
3.
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Gentoo Linux Security Advisory GLSA 200606-19
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http://security.gentoo.org/
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Severity: Normal
Title: Sendmail: Denial of Service
Date: June 15, 2006
Bugs: #135141
ID: 200606-19
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Synopsis
========
Faulty multipart MIME messages can cause forked Sendmail processes to
crash.
Background
==========
Sendmail is a popular mail transfer agent (MTA).
Affected packages
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 mail-mta/sendmail < 8.13.6-r1 >= 8.13.6-r1
Description
===========
Frank Sheiness discovered that the mime8to7() function can recurse
endlessly during the decoding of multipart MIME messages until the
stack of the process is filled and the process crashes.
Impact
======
By sending specially crafted multipart MIME messages, a remote attacker
can cause a subprocess forked by Sendmail to crash. If Sendmail is not
set to use a randomized queue processing, the attack will effectively
halt the delivery of queued mails as well as the malformed one,
incoming mail delivered interactively is not affected. Additionally, on
systems where core dumps with an individual naming scheme (like
"core.pid") are enabled, a filesystem may fill up with core dumps. Core
dumps are disabled by default in Gentoo.
Workaround
==========
The Sendmail 8.13.7 release information offers some workarounds, please
see the Reference below. Note that the issue has actually been fixed in
the 8.13.6-r1 ebuild.
Resolution
==========
All Sendmail users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/sendmail-8.13.6-r1"
References
==========
[ 1 ] CVE-2006-1173
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1173
[ 2 ] Sendmail 8.13.7 release information
http://www.sendmail.org/releases/8.13.7.html
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200606-19.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@xxxxxxxxxx or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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For additional information or assistance, please contact the HELP Desk by
telephone or Not Protectively Marked information may be sent via
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On Call Duty Officer:
Tel: +44 (0) 870 487 0748 and follow the prompts
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UNIRAS wishes to acknowledge the contributions of Gentoo for the information
contained in this Briefing.
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This Briefing contains the information released by the original author. Some
of the information may have changed since it was released. If the vulnerability
affects you, it may be prudent to retrieve the advisory from the site of the
original source to ensure that you receive the most current information concerning
that problem.
Reference to any specific commercial product, process, or service by trade
name, trademark manufacturer, or otherwise, does not constitute or imply
its endorsement, recommendation, or favouring by UNIRAS or NISCC. The views
and opinions of authors expressed within this notice shall not be used for
advertising or product endorsement purposes.
Neither UNIRAS or NISCC shall also accept responsibility for any errors
or omissions contained within this briefing notice. In particular, they shall
not be liable for any loss or damage whatsoever, arising from or in connection
with the usage of information contained within this notice.
UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST)
and has contacts with other international Incident Response Teams (IRTs) in
order to foster cooperation and coordination in incident prevention, to prompt
rapid reaction to incidents, and to promote information sharing amongst its
members and the community at large.
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<End of UNIRAS Briefing>
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