Bugs found in Kerberos
The MIT developers of the Kerberos authentication system have released patches for several serious security holes, which could allow remote attackers to obtain sensitive information, shut down a system or execute malicious code.
The first problem is with the Kerberos Key Distribution Center (KDC) and involves the way the KDC handles incoming krb4 requests. The problem can be exploited to crash the KDC server, execute malicious code or disclose memory, according to MIT.
The second problem is in the way the KDC sends responses for krb4 requests, which can be exploited to disclose potentially sensitive stack memory via a specially crafted krb4 request.
Exploitation for these first two bugs requires that krb4 support is enabled in the KDC; it is disabled by default in newer versions. These bugs affect Kerberos 5 versions 1.6.3 and earlier.
The third bug is in the Kerberos RPC library when handling open file descriptors. Under certain conditions, an attacker could send an overly large number of RPC connections, causing a memory corruption and allowing the execution of malicious code.
This bug affects Kerberos 5 versions 1.2.2 to 1.3 and 1.4 through 1.6.3, according to MIT.
Independent security firm Secunia gave the bugs a "highly critical" ranking.
» posted by abennett
Techworld.com
Symantec Backup Exec 12 and Backup Exec System Recovery 8 deliver industry leading Windows data protection and system recovery. Download this whitepaper to find out the top reasons to upgrade and how to get continuous data protection and complete system recovery.
Data and system loss — from a hard drive failure, malicious attack, natural disaster, or simple human error — can happen anytime. Don’t leave your business vulnerable. Make sure you have a secure recovery strategy in place. Symantec's latest backup and system recovery technology can efficiently restore critical applications, individual emails and documents and even restore your entire system in minutes in the event of a loss.
Businesses face a growing challenge to ensure that the IT environment is properly protected. Backup Exec 12 integrates with other applications in the Symantec family of products, to complement your current data protection strategy, keep your data securely backed up and make it recoverable when you need it most.
Crimeware: Understanding New Attacks and Defenses
By Markus Jakobsson, Zulfikar Ramzan
Published Apr 6, 2008 by Addison-Wesley Professional. Part of the Symantec Press series.
Enter now! | Official rules | Sample chapter
Securing VoIP Networks: Threats, Vulnerabilities, and Countermeasures
By Peter Thermos, Ari Takanen
Published Aug 1, 2007 by Addison-Wesley Professional.
Enter now! | Official rules | Sample chapter
