Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title PAM regression
Informations
Name USN-1140-2 First vendor Publication 2011-05-31
Vendor Ubuntu Last vendor Modification 2011-05-31
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 6.9 Attack Range Local
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.04 - Ubuntu 10.10 - Ubuntu 10.04 LTS - Ubuntu 8.04 LTS

Summary:

The USN-1140-1 PAM update caused cron to stop working.

Software Description: - pam: Pluggable Authentication Modules

Details:

USN-1140-1 fixed vulnerabilities in PAM. A regression was found that caused cron to stop working with a "Module is unknown" error. As a result, systems configured with automatic updates will not receive updates until cron is restarted, these updates are installed or the system is rebooted. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Marcus Granado discovered that PAM incorrectly handled configuration files
with non-ASCII usernames. A remote attacker could use this flaw to cause a
denial of service, or possibly obtain login access with a different users
username. This issue only affected Ubuntu 8.04 LTS. (CVE-2009-0887)

It was discovered that the PAM pam_xauth, pam_env and pam_mail modules
incorrectly handled dropping privileges when performing operations. A local
attacker could use this flaw to read certain arbitrary files, and access
other sensitive information. (CVE-2010-3316, CVE-2010-3430, CVE-2010-3431,
CVE-2010-3435)

It was discovered that the PAM pam_namespace module incorrectly cleaned the
environment during execution of the namespace.init script. A local attacker
could use this flaw to possibly gain privileges. (CVE-2010-3853)

It was discovered that the PAM pam_xauth module incorrectly handled certain
failures. A local attacker could use this flaw to delete certain unintended
files. (CVE-2010-4706)

It was discovered that the PAM pam_xauth module incorrectly verified
certain file properties. A local attacker could use this flaw to cause a
denial of service. (CVE-2010-4707)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 11.04:
libpam-modules 1.1.2-2ubuntu8.3
libpam0g 1.1.2-2ubuntu8.3

Ubuntu 10.10:
libpam-modules 1.1.1-4ubuntu2.3
libpam0g 1.1.1-4ubuntu2.3

Ubuntu 10.04 LTS:
libpam-modules 1.1.1-2ubuntu5.3
libpam0g 1.1.1-2ubuntu5.3

Ubuntu 8.04 LTS:
libpam-modules 0.99.7.1-5ubuntu6.4
libpam0g 0.99.7.1-5ubuntu6.4

In general, a standard system update will make all the necessary changes.

References:
https://launchpad.net/bugs/790538

Package Information:
https://launchpad.net/ubuntu/+source/pam/1.1.2-2ubuntu8.3
https://launchpad.net/ubuntu/+source/pam/1.1.1-4ubuntu2.3
https://launchpad.net/ubuntu/+source/pam/1.1.1-2ubuntu5.3
https://launchpad.net/ubuntu/+source/pam/0.99.7.1-5ubuntu6.4

Original Source

Url : http://www.ubuntu.com/usn/USN-1140-2

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-399 Resource Management Errors
50 % CWE-189 Numeric Errors (CWE/SANS Top 25)

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:13730
 
Oval ID: oval:org.mitre.oval:def:13730
Title: USN-1140-2 -- pam regression
Description: pam: Pluggable Authentication Modules Details: USN-1140-1 fixed vulnerabilities in PAM. A regression was found that caused cron to stop working with a "Module is unknown" error. As a result, systems configured with automatic updates will not receive updates until cron is restarted, these updates are installed or the system is rebooted. This update fixes the problem. We apologize for the inconvenience. Original advisory The USN-1140-1 PAM update caused cron to stop working.
Family: unix Class: patch
Reference(s): USN-1140-2
CVE-2009-0887
CVE-2010-3316
CVE-2010-3430
CVE-2010-3431
CVE-2010-3435
CVE-2010-3853
CVE-2010-4706
CVE-2010-4707
 Version: 5
Platform(s): Ubuntu 10.10
Ubuntu 8.04
Ubuntu 10.04
 Product(s): pam
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:13977
 
Oval ID: oval:org.mitre.oval:def:13977
Title: USN-1140-1 -- pam vulnerabilities
Description: pam: Pluggable Authentication Modules An attacker could cause PAM to read or delete arbitrary files or cause it to crash.
Family: unix Class: patch
Reference(s): USN-1140-1
CVE-2009-0887
CVE-2010-3316
CVE-2010-3430
CVE-2010-3431
CVE-2010-3435
CVE-2010-3853
CVE-2010-4706
CVE-2010-4707
 Version: 5
Platform(s): Ubuntu 10.10
Ubuntu 8.04
Ubuntu 10.04
 Product(s): pam
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:19576
 
Oval ID: oval:org.mitre.oval:def:19576
Title: VMware ESX/ESXi SLPD denial of service vulnerability and ESX third party updates for Service Console packages bind, pam, and rpm.
Description: pam_namespace.c in the pam_namespace module in Linux-PAM (aka pam) before 1.1.3 uses the environment of the invoking application or service during execution of the namespace.init script, which might allow local users to gain privileges by running a setuid program that relies on the pam_namespace PAM check, as demonstrated by the sudo program.
Family: unix Class: vulnerability
Reference(s): CVE-2010-3853
 Version: 4
Platform(s): VMWare ESX Server 4.1
VMWare ESX Server 4.0
 Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:19932
 
Oval ID: oval:org.mitre.oval:def:19932
Title: VMware ESX/ESXi SLPD denial of service vulnerability and ESX third party updates for Service Console packages bind, pam, and rpm.
Description: The run_coprocess function in pam_xauth.c in the pam_xauth module in Linux-PAM (aka pam) before 1.1.2 does not check the return values of the setuid, setgid, and setgroups system calls, which might allow local users to read arbitrary files by executing a program that relies on the pam_xauth PAM check.
Family: unix Class: vulnerability
Reference(s): CVE-2010-3316
 Version: 4
Platform(s): VMWare ESX Server 4.1
VMWare ESX Server 4.0
 Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:20251
 
Oval ID: oval:org.mitre.oval:def:20251
Title: VMware ESX/ESXi SLPD denial of service vulnerability and ESX third party updates for Service Console packages bind, pam, and rpm.
Description: The (1) pam_env and (2) pam_mail modules in Linux-PAM (aka pam) before 1.1.2 use root privileges during read access to files and directories that belong to arbitrary user accounts, which might allow local users to obtain sensitive information by leveraging this filesystem activity, as demonstrated by a symlink attack on the .pam_environment file in a user's home directory.
Family: unix Class: vulnerability
Reference(s): CVE-2010-3435
 Version: 4
Platform(s): VMWare ESX Server 4.1
VMWare ESX Server 4.0
 Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:22164
 
Oval ID: oval:org.mitre.oval:def:22164
Title: RHSA-2010:0819: pam security update (Moderate)
Description: The check_acl function in pam_xauth.c in the pam_xauth module in Linux-PAM (aka pam) 1.1.2 and earlier does not verify that a certain ACL file is a regular file, which might allow local users to cause a denial of service (resource consumption) via a special file.
Family: unix Class: patch
Reference(s): RHSA-2010:0819-01
CESA-2010:0819
CVE-2010-3316
CVE-2010-3435
CVE-2010-3853
CVE-2010-4707
 Version: 55
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
 Product(s): pam
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23155
 
Oval ID: oval:org.mitre.oval:def:23155
Title: ELSA-2010:0819: pam security update (Moderate)
Description: The check_acl function in pam_xauth.c in the pam_xauth module in Linux-PAM (aka pam) 1.1.2 and earlier does not verify that a certain ACL file is a regular file, which might allow local users to cause a denial of service (resource consumption) via a special file.
Family: unix Class: patch
Reference(s): ELSA-2010:0819-01
CVE-2010-3316
CVE-2010-3435
CVE-2010-3853
CVE-2010-4707
 Version: 21
Platform(s): Oracle Linux 5
 Product(s): pam
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:27934
 
Oval ID: oval:org.mitre.oval:def:27934
Title: DEPRECATED: ELSA-2010-0819 -- pam security update (moderate)
Description: [0.99.6.2-6.2] - fix insecure dropping of priviledges in pam_xauth and pam_mail - CVE-2010-3316 (#637898), CVE-2010-3435 (#641335) - fix insecure executing of scripts with user supplied environment variables in pam_namespace - CVE-2010-3853 (#643043)
Family: unix Class: patch
Reference(s): ELSA-2010-0819
CVE-2010-3316
CVE-2010-3435
CVE-2010-3853
CVE-2010-4707
 Version: 4
Platform(s): Oracle Linux 5
 Product(s): pam
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 25

OpenVAS Exploits

Date Description
2012-08-10 Name : Gentoo Security Advisory GLSA 201206-31 (pam)
File : nvt/glsa_201206_31.nasl
2012-03-16 Name : VMSA-2011-0004.3 VMware ESX/ESXi SLPD denial of service vulnerability and ESX...
File : nvt/gb_VMSA-2011-0004.nasl
2011-06-06 Name : Ubuntu Update for pam USN-1140-1
File : nvt/gb_ubuntu_USN_1140_1.nasl
2011-06-06 Name : Ubuntu Update for pam USN-1140-2
File : nvt/gb_ubuntu_USN_1140_2.nasl
2010-12-02 Name : Fedora Update for pam FEDORA-2010-17155
File : nvt/gb_fedora_2010_17155_pam_fc14.nasl
2010-11-23 Name : Fedora Update for pam FEDORA-2010-17133
File : nvt/gb_fedora_2010_17133_pam_fc12.nasl
2010-11-16 Name : RedHat Update for pam RHSA-2010:0819-01
File : nvt/gb_RHSA-2010_0819-01_pam.nasl
2010-11-16 Name : Fedora Update for pam FEDORA-2010-17112
File : nvt/gb_fedora_2010_17112_pam_fc13.nasl
2010-11-16 Name : Mandriva Update for pam MDVSA-2010:220 (pam)
File : nvt/gb_mandriva_MDVSA_2010_220.nasl
2009-09-09 Name : Gentoo Security Advisory GLSA 200909-01 (pam)
File : nvt/glsa_200909_01.nasl
2009-04-15 Name : Fedora Core 10 FEDORA-2009-3204 (pam)
File : nvt/fcore_2009_3204.nasl
2009-04-15 Name : Fedora Core 9 FEDORA-2009-3231 (pam)
File : nvt/fcore_2009_3231.nasl
2009-03-31 Name : Mandrake Security Advisory MDVSA-2009:077 (pam)
File : nvt/mdksa_2009_077.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
70653 Linux-PAM pam_xauth Module pam_xauth.c check_acl Function Special ACL File Lo...

Linux-PAM contains a flaw that may allow a local denial of service. The issue is triggered when the 'check_acl' function in 'pam_xauth.c' in the 'pam_xauth' module fails to verify that a ACL file is a regular file, allowing a local user to use a special file to cause a denial of service.
70652 Linux-PAM pam_xauth Module pam_xauth.c pam_sm_close_session Function Arbitrar...

Linux-PAM contains a flaw related to the 'pam_sm_close_session' function in 'pam_xauth.c' in the 'pam_xauth' module's failure to properly handle an inability to determine a target uid. This may allow a local attacker to delete arbitrary files via a program utilizing the pam_xauth PAM check.
68994 Linux-PAM pam_xauth Module run_coprocess() Function Process Limit Bypass

Linux-PAM contains a flaw that may allow an attacker to gain access to unauthorized privileges. The issue is triggered when the "pam_xauth" module incorrectly checks the return values of the "setuid()" and "setgid()" functions when dropping privileges, allowing a remote attacker to gain escalated privileges.
68993 Linux-PAM pam_mail Module Arbitrary Mail File Enumeration

Linux-PAM contains a flaw that may lead to an unauthorized information disclosure.  The issue is triggered when an error in the 'pam_mail' module occurs when dropping privileges, which will disclose the presence of certain mail files to a local attacker.
68992 Linux-PAM pam_namespace Module namespace Init Script Environment Handling Loc...

Linux-PAM contains a flaw that may allow an attacker to gain access to unauthorized privileges. The issue is triggered when an error in the 'pam_namespace' module when executing the namespace init script occurs, allowing a local attacker to use crafted environment variables when running a setuid program to gain elevated privileges.
68991 Linux-PAM pam_env Module .pam_environment File Symlink Arbitrary Local File D...

Linux-PAM contains a flaw that may lead to an unauthorized information disclosure. The issue is triggered when an error in the 'pam_env' module when dropping privileges occurs, allowing a local attacker to gain access to arbitrary files by symlinking the '.pam_environment' file to a restricted file.
53112 Linux-PAM (pam) libpam/pam_misc.c _pam_StrTok Function Integer Signedness Wea...

Information Assurance Vulnerability Management (IAVM)

Date Description
2011-05-12 IAVM : 2011-A-0066 - Multiple Vulnerabilities in VMware Products
Severity : Category I - VMSKEY : V0027158

Nessus® Vulnerability Scanner

Date Description
2016-03-04 Name : The remote VMware ESX / ESXi host is missing a security-related patch.
File : vmware_VMSA-2011-0004_remote.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : suse_11_3_pam-111025.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2010-0819.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2010-0891.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20101101_pam_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20101116_pam_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2012-06-26 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201206-31.nasl - Type : ACT_GATHER_INFO
2011-12-13 Name : The remote SuSE 11 host is missing one or more security updates.
File : suse_11_pam-111025.nasl - Type : ACT_GATHER_INFO
2011-12-13 Name : The remote SuSE 10 host is missing a security-related patch.
File : suse_pam-7814.nasl - Type : ACT_GATHER_INFO
2011-11-03 Name : The remote SuSE 10 host is missing a security-related patch.
File : suse_pam-7815.nasl - Type : ACT_GATHER_INFO
2011-06-13 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1140-2.nasl - Type : ACT_GATHER_INFO
2011-06-13 Name : The remote Ubuntu host is missing a security-related patch.
File : ubuntu_USN-1140-1.nasl - Type : ACT_GATHER_INFO
2011-03-08 Name : The remote VMware ESXi / ESX host is missing one or more security-related pat...
File : vmware_VMSA-2011-0004.nasl - Type : ACT_GATHER_INFO
2010-11-24 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2010-0819.nasl - Type : ACT_GATHER_INFO
2010-11-18 Name : The remote Fedora host is missing a security update.
File : fedora_2010-17133.nasl - Type : ACT_GATHER_INFO
2010-11-18 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2010-0891.nasl - Type : ACT_GATHER_INFO
2010-11-08 Name : The remote Fedora host is missing a security update.
File : fedora_2010-17155.nasl - Type : ACT_GATHER_INFO
2010-11-05 Name : The remote Fedora host is missing a security update.
File : fedora_2010-17112.nasl - Type : ACT_GATHER_INFO
2010-11-04 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2010-220.nasl - Type : ACT_GATHER_INFO
2010-11-02 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2010-0819.nasl - Type : ACT_GATHER_INFO
2009-09-08 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200909-01.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2009-077.nasl - Type : ACT_GATHER_INFO
2009-04-23 Name : The remote Fedora host is missing a security update.
File : fedora_2009-3204.nasl - Type : ACT_GATHER_INFO
2009-04-15 Name : The remote Fedora host is missing a security update.
File : fedora_2009-3231.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2014-02-17 11:58:39
  • Multiple Updates