---------------------------------------------------------------------- Bist Du interessiert an einem neuen Job in IT-Sicherheit? Secunia hat zwei freie Stellen als Junior und Senior Spezialist in IT- Sicherheit: http://secunia.com/secunia_vacancies/ ---------------------------------------------------------------------- TITLE: Shorewall Rules / Policies Bypass Security Issue SECUNIA ADVISORY ID: SA16087 VERIFY ADVISORY: http://secunia.com/advisories/16087/ CRITICAL: Less critical IMPACT: Security Bypass WHERE: >From local network SOFTWARE: Shorewall 2.4.x http://secunia.com/product/5400/ Shorewall 2.0.x http://secunia.com/product/3666/ Shorewall 2.2.x http://secunia.com/product/5399/ DESCRIPTION: A security issue has been reported in Shorewall, which can be exploited by malicious people to bypass certain security restrictions. The security issue is caused due to an error that allows a client that has already been authenticated based on its MAC address to bypass all other configured rules and policies. Successful exploitation requires MACLIST_TTL to be configured to a value greater than 0 or MACLIST_DISPOSITION to be configured as "ACCEPT" . The security issue has been reported in versions 2.0.x, 2.2.x and 2.4.x. SOLUTION: Update to the fixed version of firewall script. Version 2.4.x: http://shorewall.net/pub/shorewall/2.4/shorewall-2.4.1/errata/firewall Version 2.2.x: http://shorewall.net/pub/shorewall/2.2/shorewall-2.2.5/errata/firewall Version 2.0.x: http://shorewall.net/pub/shorewall/errata/2.0.17/firewall PROVIDED AND/OR DISCOVERED BY: The vendor credits Supernaut. ORIGINAL ADVISORY: http://shorewall.net/News.htm#20050717 ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------