modules/rlm_unix/rlm_unix.c in FreeRADIUS before 2.2.0, when unix mode is enabled for user authentication, does not properly check the password expiration in /etc/shadow, which allows remote authenticated users to authenticate using an expired password.

- fix for CVE-2011-4966 (bnc#797313)     (freeradius-server-CVE-2011-4966.patch)

  - fixed a bug in the logrotate script (bnc#797292)

It was discovered that FreeRADIUS incorrectly handled unix authentication. A remote user could successfully authenticate with an expired password. (CVE-2011-4966)

Pierre Carrier discovered that FreeRADIUS incorrectly handled rlm_pap hash processing. An authenticated user could use this issue to cause FreeRADIUS to crash, resulting in a denial of service, or possibly execute arbitrary code. The default compiler options for affected releases should reduce the vulnerability to a denial of service.
(CVE-2014-2015).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

From Red Hat Security Advisory 2013:0134 :

Updated freeradius2 packages that fix one security issue and multiple bugs are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

FreeRADIUS is an open source Remote Authentication Dial-In User Service (RADIUS) server which allows RADIUS clients to perform authentication against the RADIUS server. The RADIUS server may optionally perform accounting of its operations using the RADIUS protocol.

It was found that the 'unix' module ignored the password expiration setting in '/etc/shadow'. If FreeRADIUS was configured to use this module for user authentication, this flaw could allow users with an expired password to successfully authenticate, even though their access should have been denied. (CVE-2011-4966)

This update also fixes the following bugs :

* After log rotation, the freeradius logrotate script failed to reload the radiusd daemon and log messages were lost. This update has added a command to the freeradius logrotate script to reload the radiusd daemon and the radiusd daemon re-initializes and reopens its log files after log rotation as expected. (BZ#787111)

* The radtest script with the 'eap-md5' option failed because it passed the IP family argument when invoking the radeapclient utility and the radeapclient utility did not recognize the IP family. The radeapclient utility now recognizes the IP family argument and radtest now works with eap-md5 as expected. (BZ#846476)

* Previously, freeradius was compiled without the '--with-udpfromto' option. Consequently, with a multihomed server and explicitly specifying the IP address, freeradius sent the reply with the wrong IP source address. With this update, freeradius has been built with the '--with-udpfromto' configuration option and the RADIUS reply is always sourced from the IP address the request was sent to. (BZ#846471)

* Due to invalid syntax in the PostgreSQL admin schema file, the FreeRADIUS PostgreSQL tables failed to be created. With this update, the syntax has been adjusted and the tables are created as expected.
(BZ#818885)

* FreeRADIUS has a thread pool that dynamically grows based on load.
If multiple threads using the 'rlm_perl()' function are spawned in quick succession, the FreeRADIUS server sometimes terminated unexpectedly with a segmentation fault due to parallel calls to the 'rlm_perl_clone()' function. With this update, a mutex for the threads has been added and the problem no longer occurs. (BZ#846475)

* The man page for 'rlm_dbm_parser' was incorrectly installed as 'rlm_dbm_parse', omitting the trailing 'r'. The man page now correctly appears as rlm_dbm_parser. (BZ#781877)

All users of freeradius2 are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
They are also advised to check for RPM backup files ending in '.rpmnew' or '.rpmsave' under the /etc/raddb/ directory after the update because the FreeRADIUS server will attempt to load every file it finds in its configuration directory. The extra files will often cause the wrong configuration values to be applied resulting in either unpredictable behavior or the failure of the server to initialize and run.

Updated freeradius packages fixes security vulnerabilities :

It was found that the unix module ignored the password expiration setting in /etc/shadow. If FreeRADIUS was configured to use this module for user authentication, this flaw could allow users with an expired password to successfully authenticate, even though their access should have been denied (CVE-2011-4966).

Stack-based buffer overflow in the cbtls_verify function in FreeRADIUS 2.1.10 through 2.1.12, when using TLS-based EAP methods, allows remote attackers to cause a denial of service (server crash) and possibly execute arbitrary code via a long not after timestamp in a client certificate (CVE-2012-3547).

This update for freeradius-server provides the following fixes and improvements :

  - Increase the vendor IDs limit from 32767 to 65535.
    (bnc#791666)

  - Fix issues with escaping special characters in password.
    (bnc#797515)

  - Respect expired passwords and accounts when using the     unix module. (bnc#797313, CVE-2011-4966)

It was found that the 'unix' module ignored the password expiration setting in '/etc/shadow'. If FreeRADIUS was configured to use this module for user authentication, this flaw could allow users with an expired password to successfully authenticate, even though their access should have been denied. (CVE-2011-4966)

This update also fixes the following bugs :

  - After log rotation, the freeradius logrotate script     failed to reload the radiusd daemon and log messages     were lost. This update has added a command to the     freeradius logrotate script to reload the radiusd daemon     and the radiusd daemon re-initializes and reopens its     log files after log rotation as expected.

  - The radtest script with the 'eap-md5' option failed     because it passed the IP family argument when invoking     the radeapclient utility and the radeapclient utility     did not recognize the IP family. The radeapclient     utility now recognizes the IP family argument and     radtest now works with eap-md5 as expected.

  - Previously, freeradius was compiled without the     '--with-udpfromto' option. Consequently, with a     multihomed server and explicitly specifying the IP     address, freeradius sent the reply with the wrong IP     source address. With this update, freeradius has been     built with the '--with-udpfromto' configuration option     and the RADIUS reply is always sourced from the IP     address the request was sent to.

  - Due to invalid syntax in the PostgreSQL admin schema     file, the FreeRADIUS PostgreSQL tables failed to be     created. With this update, the syntax has been adjusted     and the tables are created as expected.

  - FreeRADIUS has a thread pool that dynamically grows     based on load. If multiple threads using the     'rlm_perl()' function are spawned in quick succession,     the FreeRADIUS server sometimes terminated unexpectedly     with a segmentation fault due to parallel calls to the     'rlm_perl_clone()' function. With this update, a mutex     for the threads has been added and the problem no longer     occurs.

  - The man page for 'rlm_dbm_parser' was incorrectly     installed as 'rlm_dbm_parse', omitting the trailing 'r'.
    The man page now correctly appears as rlm_dbm_parser.

They are also advised to check for RPM backup files ending in '.rpmnew' or '.rpmsave' under the /etc/raddb/ directory after the update because the FreeRADIUS server will attempt to load every file it finds in its configuration directory. The extra files will often cause the wrong configuration values to be applied resulting in either unpredictable behavior or the failure of the server to initialize and run.

Updated freeradius2 packages that fix one security issue and multiple bugs are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

FreeRADIUS is an open source Remote Authentication Dial-In User Service (RADIUS) server which allows RADIUS clients to perform authentication against the RADIUS server. The RADIUS server may optionally perform accounting of its operations using the RADIUS protocol.

It was found that the 'unix' module ignored the password expiration setting in '/etc/shadow'. If FreeRADIUS was configured to use this module for user authentication, this flaw could allow users with an expired password to successfully authenticate, even though their access should have been denied. (CVE-2011-4966)

This update also fixes the following bugs :

* After log rotation, the freeradius logrotate script failed to reload the radiusd daemon and log messages were lost. This update has added a command to the freeradius logrotate script to reload the radiusd daemon and the radiusd daemon re-initializes and reopens its log files after log rotation as expected. (BZ#787111)

* The radtest script with the 'eap-md5' option failed because it passed the IP family argument when invoking the radeapclient utility and the radeapclient utility did not recognize the IP family. The radeapclient utility now recognizes the IP family argument and radtest now works with eap-md5 as expected. (BZ#846476)

* Previously, freeradius was compiled without the '--with-udpfromto' option. Consequently, with a multihomed server and explicitly specifying the IP address, freeradius sent the reply with the wrong IP source address. With this update, freeradius has been built with the '--with-udpfromto' configuration option and the RADIUS reply is always sourced from the IP address the request was sent to. (BZ#846471)

* Due to invalid syntax in the PostgreSQL admin schema file, the FreeRADIUS PostgreSQL tables failed to be created. With this update, the syntax has been adjusted and the tables are created as expected.
(BZ#818885)

* FreeRADIUS has a thread pool that dynamically grows based on load.
If multiple threads using the 'rlm_perl()' function are spawned in quick succession, the FreeRADIUS server sometimes terminated unexpectedly with a segmentation fault due to parallel calls to the 'rlm_perl_clone()' function. With this update, a mutex for the threads has been added and the problem no longer occurs. (BZ#846475)

* The man page for 'rlm_dbm_parser' was incorrectly installed as 'rlm_dbm_parse', omitting the trailing 'r'. The man page now correctly appears as rlm_dbm_parser. (BZ#781877)

All users of freeradius2 are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
They are also advised to check for RPM backup files ending in '.rpmnew' or '.rpmsave' under the /etc/raddb/ directory after the update because the FreeRADIUS server will attempt to load every file it finds in its configuration directory. The extra files will often cause the wrong configuration values to be applied resulting in either unpredictable behavior or the failure of the server to initialize and run.

The remote Redhat Enterprise Linux 5 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2013:0134 advisory.

  - freeradius: does not respect expired passwords when using the unix module (CVE-2011-4966)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
74983	openSUSE Security Update : freeradius-server (openSUSE-SU-2013:0137-1)	Nessus	SuSE Local Security Checks	medium
72719	Ubuntu 10.04 LTS / 12.04 LTS / 12.10 / 13.10 : freeradius vulnerabilities (USN-2122-1)	Nessus	Ubuntu Local Security Checks	high
68705	Oracle Linux 5 : freeradius2 (ELSA-2013-0134)	Nessus	Oracle Linux Local Security Checks	medium
66052	Mandriva Linux Security Advisory : freeradius (MDVSA-2013:038)	Nessus	Mandriva Local Security Checks	medium
64925	SuSE 11.2 Security Update : freeradius (SAT Patch Number 7255)	Nessus	SuSE Local Security Checks	medium
63593	Scientific Linux Security Update : freeradius2 on SL5.x i386/x86_64 (20130108)	Nessus	Scientific Linux Local Security Checks	medium
63579	CentOS 5 : freeradius2 (CESA-2013:0134)	Nessus	CentOS Local Security Checks	medium
63415	RHEL 5 : freeradius2 (RHSA-2013:0134)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2011-4966

high

Tenable Plugins

medium

high

medium

medium

medium

medium

medium

high