{"vuid":"VU#728057","idnumber":"728057","name":"Microsoft Windows Agent fails to properly process crafted URLs","keywords":["Microsoft","Windows","Agent","crafted URLs","ms07-apr"],"overview":"Microsoft Agent fails to properly handle specially crafted URLs, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.","clean_desc":"Microsoft Agent is software that provides animated characters to enhance interaction with computer systems. Microsoft Agent comes with Microsoft Windows systems. Microsoft Agent functionality is exposed as an ActiveX control that can be used by web pages. Microsoft Agent fails to properly handle specially crafted URLs, which can result in memory corruption.","impact":"By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), an attacker may be able to execute arbitrary code with the privileges of the user. The attacker could also cause the web browser to crash.","resolution":"Apply an update\nThis issue is addressed in Microsoft Security Bulletin MS07-020.","workarounds":"Disable the Microsoft Agent ActiveX controls in Internet Explorer The vulnerable ActiveX controls can be disabled in Internet Explorer by setting the kill bit for the following CLSIDs: {D45FD31B-5C6E-11D1-9EC1-00C04FD7081F} {F5BE8BD2-7DE6-11D0-91FE-00C04FD701A5} {4BAC124B-78C8-11D1-B9A8-00C04FD97575} {D45FD31D-5C6E-11D1-9EC1-00C04FD7081F} {D45FD31E-5C6E-11D1-9EC1-00C04FD7081F} More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Internet Explorer\\ActiveX Compatibility\\{D45FD31B-5C6E-11D1-9EC1-00C04FD7081F}] \"Compatibility Flags\"=dword:00000400 [HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Internet Explorer\\ActiveX Compatibility\\{F5BE8BD2-7DE6-11D0-91FE-00C04FD701A5}] \"Compatibility Flags\"=dword:00000400 [HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Internet Explorer\\ActiveX Compatibility\\{4BAC124B-78C8-11D1-B9A8-00C04FD97575}] \"Compatibility Flags\"=dword:00000400 [HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Internet Explorer\\ActiveX Compatibility\\{D45FD31D-5C6E-11D1-9EC1-00C04FD7081F}] \"Compatibility Flags\"=dword:00000400 [HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Internet Explorer\\ActiveX Compatibility\\{D45FD31E-5C6E-11D1-9EC1-00C04FD7081F}] \"Compatibility Flags\"=dword:00000400\nUnregister AgentSvr.exe The Microsoft Agent ActiveX controls interact with the Microsoft Agent Server (AgentSvr.exe) to provide Agent functionality. The Microsoft Agent Server can be unregistered to mitigate this vulnerability by running the following command: %windir%\\msagent\\agentsvr.exe /unregserver\nDisable ActiveX Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the \"Securing Your Web Browser\" document.","sysaffected":"","thanks":"This vulnerability was reported by Microsoft, who in turn credit JJ Reyes and Carsten Eiram of Secunia.","author":"This document was written by Will Dormann.","public":["http://www.microsoft.com/technet/security/bulletin/ms07-020.mspx","http://secunia.com/advisories/22896/","http://secunia.com/secunia_research/2006-74/advisory/"],"cveids":["CVE-2007-1205"],"certadvisory":"","uscerttechnicalalert":null,"datecreated":"2007-04-10T18:12:48Z","publicdate":"2007-04-10T00:00:00Z","datefirstpublished":"2007-04-10T20:07:15Z","dateupdated":"2007-04-11T17:28:50Z","revision":7,"vrda_d1_directreport":"0","vrda_d1_population":"4","vrda_d1_impact":"3","cam_widelyknown":"15","cam_exploitation":"0","cam_internetinfrastructure":"8","cam_population":"20","cam_impact":"15","cam_easeofexploitation":"6","cam_attackeraccessrequired":"17","cam_scorecurrent":"13.19625","cam_scorecurrentwidelyknown":"16.065","cam_scorecurrentwidelyknownexploited":"27.54","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":13.19625,"vulnote":null}