RHSA-2007:0795Executive Summary
| Summary | |
|---|---|
| Title | cyrus-sasl security and bug fix update |
| Informations | |||
|---|---|---|---|
| Name | RHSA-2007:0795 | First vendor Publication | 2007-09-04 |
| Vendor | RedHat | Last vendor Modification | 2007-09-04 |
| Severity (Vendor) | Moderate | Revision | 01 |
Security-Database Scoring CVSS v2
| Cvss vector : (AV:N/AC:H/Au:N/C:N/I:N/A:P) | |||
|---|---|---|---|
| Cvss Base Score | 2.6 | Attack Range | Network |
| Cvss Impact Score | 2.9 | Attack Complexity | High |
| Cvss Expoit Score | 4.9 | Authentification | None Required |
| Calculate full CVSS 2.0 Vectors scores | |||
Detail
Problem Description: An updated cyrus-sasl package that addresses a security issue and fixes various other bugs is now available for Red Hat Enterprise Linux 4. This update has been rated as having moderate security impact by the Red Hat Security Response Team. 2. Relevant releases/architectures: Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Enterprise Linux Desktop version 4 - i386, x86_64 Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64 3. Problem description: The cyrus-sasl package contains the Cyrus implementation of SASL. SASL is the Simple Authentication and Security Layer, a method for adding authentication support to connection-based protocols. A bug was found in cyrus-sasl's DIGEST-MD5 authentication mechanism. As part of the DIGEST-MD5 authentication exchange, the client is expected to send a specific set of information to the server. If one of these items (the "realm") was not sent or was malformed, it was possible for a remote unauthenticated attacker to cause a denial of service (segmentation fault) on the server. (CVE-2006-1721) This errata also fixes the following bugs: * the Kerberos 5 library included in Red Hat Enterprise Linux 4 was not thread safe. This update adds functionality which allows it to be used safely in a threaded application. * several memory leak bugs were fixed in cyrus-sasl's DIGEST-MD5 authentication plug-in. * /dev/urandom is now used by default on systems which don't support hwrandom. Previously, dev/random was the default. * cyrus-sasl needs zlib-devel to build properly. This dependency information is now included in the package. Users are advised to upgrade to this updated cyrus-sasl package, which resolves these issues. 4. Solution: Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/FAQ_58_10188 5. Bug IDs fixed (http://bugzilla.redhat.com/): 157012 - [RFE] cyrus-sasl should use /dev/urandom by default 189814 - CVE-2006-1721 cyrus-sasl digest-md5 DoS 190113 - Missing build dependancy for zlib-devel in cyrus-sasl 243910 - krb5-libs are not thread-safe 244075 - Memory leaks in digest-md5 plugin 250732 - sasl-sample-server crash |
Original Source
| Url : https://rhn.redhat.com/errata/RHSA-2007-0795.html |
CWE : Common Weakness Enumeration
| id | Name |
|---|---|
| CWE-20 | Improper Input Validation |
OVAL Definitions
| Definition Id: oval:org.mitre.oval:def:9861 | |||
| Oval ID: | oval:org.mitre.oval:def:9861 | ||
| Title: | digestmd5.c in the CMU Cyrus Simple Authentication and Security Layer (SASL) library 2.1.18, and possibly other versions before 2.1.21, allows remote unauthenticated attackers to cause a denial of service (segmentation fault) via malformed inputs in DIGEST-MD5 negotiation. | ||
| Description: | digestmd5.c in the CMU Cyrus Simple Authentication and Security Layer (SASL) library 2.1.18, and possibly other versions before 2.1.21, allows remote unauthenticated attackers to cause a denial of service (segmentation fault) via malformed inputs in DIGEST-MD5 negotiation. | ||
| Family: | unix | Class: | vulnerability |
| Reference(s): | CVE-2006-1721 |
Version: | 5 |
| Platform(s): | Red Hat Enterprise Linux 3 CentOS Linux 3 Red Hat Enterprise Linux 4 CentOS Linux 4 Oracle Linux 4 |
Product(s): | |
| Definition Synopsis: | |||
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CPE : Common Platform Enumeration
| Type | Description | Count |
|---|---|---|
| Application | 5 |
Open Source Vulnerability Database (OSVDB)
| id | Description |
|---|---|
| 24510 | Cyrus SASL DIGEST-MD5 Pre-Authentication Unspecified DoS |
(Low)
