---------------------------------------------------------------------- A new version (0.9.0.0 - Release Candidate 1) of the free Secunia PSI has been released. The new version includes many new and advanced features, which makes it even easier to stay patched. Download and test it today: https://psi.secunia.com/ Read more about this new version: https://psi.secunia.com/?page=changelog ---------------------------------------------------------------------- TITLE: Asterisk "BYE/Also" Denial of Service Vulnerability SECUNIA ADVISORY ID: SA28312 VERIFY ADVISORY: http://secunia.com/advisories/28312/ CRITICAL: Moderately critical IMPACT: DoS WHERE: >From remote SOFTWARE: Asterisk 1.x http://secunia.com/product/2155/ Asterisk Appliance Developer Kit 0.x http://secunia.com/product/14821/ Asterisk Business Edition 2.x http://secunia.com/product/14820/ DESCRIPTION: A vulnerability has been reported in Asterisk, which can be exploited by malicious people to cause a DoS (Denial of Service). The vulnerability is caused due to a null-pointer dereference error within the handling of the "BYE/Also" transfer method and can be exploited to crash the application. Successful exploitation requires that a dialog has already been established. The vulnerability is reported in the following versions: * Asterisk Open Source 1.4.x prior to version 1.4.17 * Asterisk Business Edition C.x.x prior to version C.1.0-beta8 * AsteriskNOW pre-release prior to beta7 * Asterisk Appliance Developer Kit prior to Asterisk 1.4 revision 95946 * s800i (Asterisk Appliance) 1.0.x prior to version 1.0.3.4 SOLUTION: Asterisk Open Source: Update to version 1.4.17: http://downloads.digium.com/pub/telephony/asterisk Asterisk Business Edition: Fixed in version C.1.0 AsteriskNOW: Fixed in Beta7 http://www.asterisknow.org/. Asterisk Appliance Developer Kit: Update to Asterisk 1.4 revision 95946. s800i (Asterisk Appliance): Update to version 1.0.3.4. PROVIDED AND/OR DISCOVERED BY: The vendor credits Grey VoIP. ORIGINAL ADVISORY: http://downloads.digium.com/pub/security/AST-2008-001.html ---------------------------------------------------------------------- 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 ----------------------------------------------------------------------