{"vuid":"VU#836024","idnumber":"836024","name":"Apple iChat fails to properly handle crafted TXT key hashes","keywords":["Apple","iChat Agent","DoS","denial of service","TXT key hashes","Apple-2007-002"],"overview":"A vulnerability in the way Apple iChat handles specially crafted TXT key hashes could lead to denial of service.","clean_desc":"Apple iChat is an instant message client for Apple Mac OS X. Apple iChat Agent is a back-end process that manages iChat sessions and available contacts. Apple Bounjour is a service provided with Apple Mac OS X that facilitates automatic discovery of computers, devices, and services on IP networks. The iChat Agent uses Bonjour to discover available contacts. The Apple iChat Agent contains a vulnerability that could be exploited when it attempts to handle specially crafted TXT key hashes received via Bonjour messages. According to  MOAB-29-01-2007: This will instantly cause a SIGTRAP signal to be sent to the process, causing a so-called 'crash'. Further attempts to launch iChat Bonjour functionality again will fail as mDNSResponder keeps the crafted record (and restarting it will be necessary).","impact":"A remote, unauthenticated attacker on the same multicast network may be able to cause iChat to crash, thereby creating a denial-of-service condition.","resolution":"Update\nApple has released an update to address this issue. See Apple Security Update 2007-002.","workarounds":"","sysaffected":"","thanks":"This issue was reported by LMH in\n MOAB-29-01-2007.","author":"This document was written by Chris Taschner.","public":["http://projects.info-pull.com/moab/MOAB-29-01-2007.html","http://secunia.com/advisories/23945/","http://docs.info.apple.com/article.html?artnum=305102","http://secunia.com/advisories/24198/","http://www.apple.com/macosx/features/ichat/","http://developer.apple.com/networking/bonjour/index.html","http://securitytracker.com/alerts/2007/Feb/1017661.html","http://www.securityfocus.com/bid/22304"],"cveids":["CVE-2007-0710"],"certadvisory":"","uscerttechnicalalert":null,"datecreated":"2007-01-30T16:08:08Z","publicdate":"2007-01-30T00:00:00Z","datefirstpublished":"2007-02-26T21:04:59Z","dateupdated":"2007-03-16T12:36:19Z","revision":23,"vrda_d1_directreport":"0","vrda_d1_population":"2","vrda_d1_impact":"2","cam_widelyknown":"15","cam_exploitation":"0","cam_internetinfrastructure":"7","cam_population":"10","cam_impact":"3","cam_easeofexploitation":"10","cam_attackeraccessrequired":"20","cam_scorecurrent":"2.475","cam_scorecurrentwidelyknown":"3.0375","cam_scorecurrentwidelyknownexploited":"5.2875","ipprotocol":"","cvss_accessvector":"","cvss_accesscomplexity":"","cvss_authentication":null,"cvss_confidentialityimpact":"","cvss_integrityimpact":"","cvss_availabilityimpact":"","cvss_exploitablity":null,"cvss_remediationlevel":"","cvss_reportconfidence":"","cvss_collateraldamagepotential":"","cvss_targetdistribution":"","cvss_securityrequirementscr":"","cvss_securityrequirementsir":"","cvss_securityrequirementsar":"","cvss_basescore":"","cvss_basevector":"","cvss_temporalscore":"","cvss_environmentalscore":"","cvss_environmentalvector":"","metric":2.475,"vulnote":null}