Off-by-one error in the sql_error function in sql_unixodbc.c in FreeRADIUS 1.0.2.5-5, and possibly other versions including 1.0.4, might allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by causing the external database query to fail. NOTE: this single issue is part of a larger-scale disclosure, originally by SUSE, which reported multiple issues that were disputed by FreeRADIUS. Disputed issues included file descriptor leaks, memory disclosure, LDAP injection, and other issues. Without additional information, the most recent FreeRADIUS report is being regarded as the authoritative source for this CVE identifier.

Several problems have been discovered in freeradius, a high-performance and highly configurable RADIUS server. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2005-4744     SuSE researchers have discovered several off-by-one     errors may allow remote attackers to cause a denial of     service and possibly execute arbitrary code.

  - CVE-2006-1354     Due to insufficient input validation it is possible for     a remote attacker to bypass authentication or cause a     denial of service.

Updated freeradius packages that fix an authentication weakness are now available.

This update has been rated as having important security impact by the Red Hat Security Response Team.

FreeRADIUS is a high-performance and highly configurable free RADIUS server designed to allow centralized authentication and authorization for a network.

A bug was found in the way FreeRADIUS authenticates users via the MSCHAP V2 protocol. It is possible for a remote attacker to authenticate as a victim by sending a malformed MSCHAP V2 login request to the FreeRADIUS server. (CVE-2006-1354)

Please note that FreeRADIUS installations not using the MSCHAP V2 protocol for authentication are not vulnerable to this issue.

A bug was also found in the way FreeRADIUS logs SQL errors from the sql_unixodbc module. It may be possible for an attacker to cause FreeRADIUS to crash or execute arbitrary code if they are able to manipulate the SQL database FreeRADIUS is connecting to.
(CVE-2005-4744)

Users of FreeRADIUS should update to these erratum packages, which contain backported patches and are not vulnerable to these issues.

The freeradious development team reports :

Multiple issues exist with version 1.0.4, and all prior versions of the server. Externally exploitable vulnerabilities exist only for sites that use the rlm_sqlcounter module. Those sites may be vulnerable to SQL injection attacks, similar to the issues noted below. All sites that have not deployed the rlm_sqlcounter module are not vulnerable to external exploits.

The issues are : SQL Injection attack in the rlm_sqlcounter module.
Buffer overflow in the rlm_sqlcounter module, that may cause a server crash. Buffer overflow while expanding %t, that may cause a server crash.

Off-by-one error in the sql_error function in sql_unixodbc.c in FreeRADIUS might allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by causing the external database query to fail.

Updated packages have been patched to correct this issue.

ID	Name	Product	Family	Severity
22631	Debian DSA-1089-1 : freeradius - several vulnerabilities	Nessus	Debian Local Security Checks	high
21895	CentOS 3 / 4 : freeradius (CESA-2006:0271)	Nessus	CentOS Local Security Checks	high
21679	FreeBSD : freeradius -- multiple vulnerabilities (ec2f2ff5-f710-11da-9156-000e0c2e438a)	Nessus	FreeBSD Local Security Checks	medium
21201	Mandrake Linux Security Advisory : freeradius (MDKSA-2006:066)	Nessus	Mandriva Local Security Checks	medium
21180	RHEL 3 / 4 : freeradius (RHSA-2006:0271)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2005-4744

critical

Tenable Plugins

high

high

medium

medium

high