+---------------------------------------------------------------------+ | LinuxSecurity.com Weekly Newsletter | | January 20th, 2006 Volume 7, Number 3a | +---------------------------------------------------------------------+ Editors: Dave Wreski Benjamin D. Thomas dave@private ben@private Linux Advisory Watch is a comprehensive newsletter that outlines the security vulnerabilities that have been announced throughout the week. It includes pointers to updated packages and descriptions of each vulnerability. This week, advisories were realeased for httpd, mod_auth_pgsql, auth_ldap, ethereal, struts, cups, gpdf, apache, and the kernel. The distributor for this week is Red Hat. ---- Earn an NSA recognized IA Masters Online The NSA has designated Norwich University a center of Academic Excellence in Information Security. Our program offers unparalleled Infosec management education and the case study affords you unmatched consulting experience. Using interactive e-Learning technology, you can earn this esteemed degree, without disrupting your career or home life. http://www.msia.norwich.edu/linsec ---- IPv6 approach for TCP SYN Flood attack over VoIP, Part V By: Suhas Desai In this paper, we describe and analyze a network based DoS attack for IP based networks. It is known as SYN flooding. It works by an attacker sending many TCP connection requests with spoofed source addresses to a victim's machine. Each request causes the targeted host to instantiate data structures out of a limited pool of resources to deny further legitimate access. Part I http://www.linuxsecurity.com/content/view/121083/49/ Part II http://www.linuxsecurity.com/content/view/121124/49/ Part III http://www.linuxsecurity.com/content/view/121169/49/ Part IV http://www.linuxsecurity.com/content/view/121205/49/ Part V: 7. Result Analysis 7.1 Most powerful and flexible L4-7 security and content networking test solution proven for: - Firewalls, edge routers, session controllers, proxies, IDS/IPS, VPN concentrators. - Servers, content switches/caches, load balancers, SSL accelerators 7.2 Mix real VoIP calls (H.323 & SIP) over integrated DHCP, IPSec, PPPoE and 802.1 xs - Realistic testing, faster set-up, no need for scripting 7.3 Integrated IPv6, IPsecv6, VLAN, and SNMP support -Rapidly test next-generation dual-stack devices and Stress the management plane at the same time 7.4 Create a realistic mix of application traffic with H.323, SIP, RTSP, SNMP, messaging on each test interface, DoS. /spam /virus attacks with over 150 measurements. 8. Conclusion This paper has described and analyzed a network based denial of service attack, called SYN flooding. It has contributed a detailed analysis for practical approach to application Performance validation for VoIP application with IPv6/IPv4 configurations and TCP SYN Flooding attacks over connection oriented networks. To protect from DoS attacks for secure, scalable, high-availability IPV6 services over VoIP performance above methods proven better results. It has proved working also for spam and virus attacks over TCP connections with network tester methods of MoonV6. 9. Acknowledgement We would like to thank Zlata Trhulj for design documentation of IPv6 services and Network tester methods presented at North American IPv6 Coalition Meeting-Reston, VA, 25 May, 2005. Read Entire Article: http://www.linuxsecurity.com/content/view/121241/49/ ---------------------- EnGarde Secure Community 3.0.3 Released Guardian Digital is happy to announce the release of EnGarde Secure Community 3.0.3 (Version 3.0, Release 3). This release includes several bug fixes and feature enhancements to the Guardian Digital WebTool, the SELinux policy, and the LiveCD environment. http://www.linuxsecurity.com/content/view/121150/65/ --- Linux File & Directory Permissions Mistakes One common mistake Linux administrators make is having file and directory permissions that are far too liberal and allow access beyond that which is needed for proper system operations. A full explanation of unix file permissions is beyond the scope of this article, so I'll assume you are familiar with the usage of such tools as chmod, chown, and chgrp. If you'd like a refresher, one is available right here on linuxsecurity.com. http://www.linuxsecurity.com/content/view/119415/49/ --- Buffer Overflow Basics A buffer overflow occurs when a program or process tries to store more data in a temporary data storage area than it was intended to hold. Since buffers are created to contain a finite amount of data, the extra information can overflow into adjacent buffers, corrupting or overwriting the valid data held in them. http://www.linuxsecurity.com/content/view/119087/49/ -------- --> Take advantage of the LinuxSecurity.com Quick Reference Card! --> http://www.linuxsecurity.com/docs/QuickRefCard.pdf +---------------------------------+ | Distribution: Red Hat | ----------------------------// +---------------------------------+ * RedHat: Moderate: httpd security update 17th, January, 2006 Updated Apache httpd packages that correct three security issues are now available for Red Hat Enterprise Linux 3 and 4. This update has been rated as having moderate security impact by the Red Hat Security Response Team. http://www.linuxsecurity.com/content/view/121220 * RedHat: Critical: mod_auth_pgsql security update 17th, January, 2006 Updated mod_auth_pgsql packages that fix format string security issues are now available for Red Hat Enterprise Linux 3 and 4. This update has been rated as having critical security impact by the Red Hat Security Response Team. http://www.linuxsecurity.com/content/view/121221 * RedHat: Critical: auth_ldap security update 17th, January, 2006 An updated auth_ldap packages that fixes a format string security issue is now available for Red Hat Enterprise Linux 2.1. This update has been rated as having critical security impact by the Red Hat Security Response Team. http://www.linuxsecurity.com/content/view/121222 * RedHat: Moderate: ethereal security update 17th, January, 2006 Updated Ethereal packages that fix various security vulnerabilities are now available. This update has been rated as having moderate security impact by the Red Hat Security Response Team. http://www.linuxsecurity.com/content/view/121223 * RedHat: Low: struts security update for Red Hat Application Server 17th, January, 2006 Updated Red Hat Application Server components are now available including a security update for Struts. This update has been rated as having low security impact by the Red Hat Security Response Team. http://www.linuxsecurity.com/content/view/121224 * RedHat: Important: cups security update 17th, January, 2006 Updated CUPS packages that fix multiple security issues are now available for Red Hat Enterprise Linux. This update has been rated as having important security impact by the Red Hat Security Response Team. http://www.linuxsecurity.com/content/view/121225 * RedHat: Important: gpdf security update 17th, January, 2006 An updated gpdf package that fixes several security issues is now available for Red Hat Enterprise Linux 4. This update has been rated as having important security impact by the Red Hat Security Response Team. http://www.linuxsecurity.com/content/view/121226 * RedHat: Moderate: apache security update 17th, January, 2006 Updated Apache httpd packages that correct a security issue are now available for Red Hat Enterprise Linux 2.1. This update has been rated as having moderate security impact by the Red Hat Security Response Team. http://www.linuxsecurity.com/content/view/121227 * RedHat: Important: kernel security update 17th, January, 2006 Updated kernel packages that fix several security issues in the Red Hat Enterprise Linux 4 kernel are now available. This security advisory has been rated as having important security impact by the Red Hat Security Response Team. http://www.linuxsecurity.com/content/view/121228 ------------------------------------------------------------------------ Distributed by: Guardian Digital, Inc. 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