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Home > Products and services > CSIRTUK advisories > Advisories archive > November 2006 > Three Gentoo Linux Security Advisories: 1. GLSA 200611-23 - Mono: Insecure temporary file creation 2. GLSA 200611-25 - OpenLDAP: Denial of Service vulnerability 3. GLSA 200611-24 - LHa: Multiple vulnerabilities

November 2006

Three Gentoo Linux Security Advisories: 1. GLSA 200611-23 - Mono: Insecure temporary file creation 2. GLSA 200611-25 - OpenLDAP: Denial of Service vulnerability 3. GLSA 200611-24 - LHa: Multiple vulnerabilities

ID: 00833
Ref: 789/2006
Date: 30 November 2006:13:31:58
Version: 1
Title: Three Gentoo Linux Security Advisories: 1. GLSA 200611-23 - Mono: Insecure temporary file creation 2. GLSA 200611-25 - OpenLDAP: Denial of Service vulnerability 3. GLSA 200611-24 - LHa: Multiple vulnerabilities
Abstract:
Vendors affected: Gentoo
Operating systems affected: Gentoo
Applications affected: Gentoo
Title
=====

Three Gentoo Linux Security Advisories:

1. GLSA 200611-23 - Mono: Insecure temporary file creation

2. GLSA 200611-25 - OpenLDAP: Denial of Service vulnerability

3. GLSA 200611-24 - LHa: Multiple vulnerabilities

Detail
======

1. Sebastian Krahmer of the SuSE Security Team discovered that the System.CodeDom.Compiler classes of Mono create temporary files with insecure permissions.

2. Evgeny Legerov has discovered that the truncation of an incoming authcid longer than 255 characters and ending with a space as the 255th character will lead to an improperly computed name length. This will trigger an assert in the libldap code.

3. Tavis Ormandy of the Google Security Team discovered several vulnerabilities in the LZH decompression component used by LHa. The make_table function of unlzh.c contains an array index error and a buffer overflow vulnerability. The build_tree function of unpack.c contains a buffer underflow vulnerability. Additionally, unlzh.c contains a code that could run in an infinite loop.





1.



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Gentoo Linux Security Advisory GLSA 200611-23
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http://security.gentoo.org/
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Severity: Normal
Title: Mono: Insecure temporary file creation
Date: November 28, 2006
Bugs: #150264
ID: 200611-23

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Synopsis
========

Mono is vulnerable to linking attacks, potentially allowing a local user to overwrite arbitrary files.

Background
==========

Mono provides the necessary software to develop and run .NET client and server applications.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-lang/mono < 1.1.13.8.1 >= 1.1.13.8.1

Description
===========

Sebastian Krahmer of the SuSE Security Team discovered that the System.CodeDom.Compiler classes of Mono create temporary files with insecure permissions.

Impact
======

A local attacker could create links in the temporary file directory, pointing to a valid file somewhere on the filesystem. When an affected class is called, this could result in the file being overwritten with the rights of the user running the script.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Mono users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/mono-1.1.13.8.1"

References
==========

[ 1 ] CVE-2006-5072
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5072

Availability
============

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200611-23.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@gentoo.org 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 200611-25
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http://security.gentoo.org/
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Severity: Normal
Title: OpenLDAP: Denial of Service vulnerability
Date: November 28, 2006
Bugs: #154349
ID: 200611-25

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Synopsis
========

A flaw in OpenLDAP allows remote unauthenticated attackers to cause a Denial of Service.

Background
==========

OpenLDAP is a suite of LDAP-related applications and development tools.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-nds/openldap < 2.3.27-r3 >= 2.3.27-r3
*>= 2.2.28-r5
*>= 2.1.30-r8

Description
===========

Evgeny Legerov has discovered that the truncation of an incoming authcid longer than 255 characters and ending with a space as the 255th character will lead to an improperly computed name length. This will trigger an assert in the libldap code.

Impact
======

By sending a BIND request with a specially crafted authcid parameter to an OpenLDAP service, a remote attacker can cause the service to crash.

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"

References
==========

[ 1 ] CVE-2006-5779
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5779

Availability
============

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200611-25.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@gentoo.org 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 200611-24
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http://security.gentoo.org/
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Severity: Normal
Title: LHa: Multiple vulnerabilities
Date: November 28, 2006
Bugs: #151252
ID: 200611-24

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Synopsis
========

LHa is affected by several vulnerabilities including the remote execution of arbitrary code.

Background
==========

LHa is a console-based program for packing and unpacking LHarc archives.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-arch/lha < 114i-r6 >= 114i-r6

Description
===========

Tavis Ormandy of the Google Security Team discovered several vulnerabilities in the LZH decompression component used by LHa. The make_table function of unlzh.c contains an array index error and a buffer overflow vulnerability. The build_tree function of unpack.c contains a buffer underflow vulnerability. Additionally, unlzh.c contains a code that could run in an infinite loop.

Impact
======

By enticing a user to uncompress a specially crafted archive, a remote attacker could cause a Denial of Service by CPU consumption or execute arbitrary code with the rights of the user running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All LHa users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/lha-114i-r6"

References
==========

[ 1 ] CVE-2006-4335
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4335
[ 2 ] CVE-2006-4336
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4336
[ 3 ] CVE-2006-4337
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4337
[ 4 ] CVE-2006-4338
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4338

Availability
============

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200611-24.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@gentoo.org 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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