Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2005.0882 -- Assurance - Vulnerability Advisory Asterisk PBX Comedian Voice Mail 7 November 2005 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Asterisk Versions <= 1.0.9 Asterisk Beta Versions <= 1.2.0-beta1 Asterisk @ Home Versions <= 1.5 Asterisk @ Home Beta Versions <= 2.0 Beta 4 Publisher: Assurance Operating System: Linux variants BSD variants Mac OS X Impact: Access Confidential Data Access: Existing Account Original Bulletin: http://www.assurance.com.au/advisories/200511-asterisk.txt - --------------------------BEGIN INCLUDED TEXT-------------------- Assurance.com.au - Vulnerability Advisory - ----------------------------------------------- Release Date: 07-Nov-2005 Software: Asterisk Web-VoiceMail (Comedian VoiceMail) http://www.asterisk.org/ Asterisk is a complete PBX in software. It runs on Linux, BSD and MacOSX and provides all of the features you would expect from a PBX and more. Asterisk does voice over IP in many protocols, and can interoperate with almost all standards-based telephony equipment using relatively inexpensive hardware. Versions affected: Asterisk Versions <= 1.0.9 Asterisk Beta Versions <= 1.2.0-beta1 Asterisk @ Home Versions <= 1.5 Asterisk @ Home Beta Versions <= 2.0 Beta 4 Vulnerability discovered: A vulnerability in the voicemail retrieval system allows an authenticated user to download any .wav/.WAV file from the system, including other users voicemail messages. Vulnerability impact: Low - Insecure web-ui causes breach of privacy Vulnerability information: vmail.cgi doesn't clean a parameter passed by the web user which is later used to open a file and return a raw stream to the user. This allows any authenticated user of the voicemail system to listen to other peoples messages, or to open any file with the extension .wav/.WAV on the system. Solution: Asterisk has released patches for the vulnerabilities. Ensure you are running Asterisk versions > 1.0.9 / 1.2.0-beta1 Ensure you are running Asterisk @ Home versions > 1.5 / 2.0 beta 4 References: Assurance.com.au advisory http://www.assurance.com.au/advisories/200511-asterisk.txt Asterisk advisory note http://www.asterisk.org/changelog Credit: Adam Pointon of Assurance.com.au http://www.assurance.com.au/ Disclosure timeline: 17-Oct-2005 - Discovered during a quick audit of the asterisk web ui 18-Oct-2005 - Email sent to support and the primary author 18-Oct-2005 - Immediate response received 31-Oct-2005 - Patched version committed to CVS 07-Nov-2005 - Advisory released About us: Assurance.com.au is a specialised information security consultancy. Our mission is to help organisations identify and secure their information assets. Our expertise concentrates in security architecture design, managed security and professional services in security testing/review and compliance. Supporting this approach are professional and managed services in the following areas: * Compliance Services - Penetration testing, security reviews, compliance and audit services * Wireless and mobility solutions - design, installation and management of IEEE 802.11a/b/g (WiFi), tele-mobility and other wireless solutions * UNIX-like systems, network and security advice and consulting Assurance.com.au also provides organisations with services to support compliance to legislative, public and internal/private standards. While primarily specialising in Australian & New Zealand standards efforts Assurance.com.au also works with other international standards related to information security These include: * ISO/IEC 17799:*, AS/NZS 17799:*, BS7799 * ISO 15408 (Common Criteria), ITSEC, TCSEC * ISO 13569, ISO 11131 * ACSI33, AS2805, AS3806, AS4360, AS4539, AS8018, HB231:2001, NPP4 (privacy) * Sarbanes-Oxley - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBQ27qtSh9+71yA2DNAQIVQwP/SXjnvrxvzZ1jVJuKxxRSE1hZkUb/GZFt 4NnS4unIEU/47LzlLs7sRnhNsGbGkYqMAnWQZgtQV3vVvxWaXnjgdgYXSXp0eVPB amFQF7mTsCXxX3gwS9+tYgvCt54OCMzYNo07BgnTPCs+WE87XTVGeqvg6b+B+L/i Ep501sju7IY= =9TWw -----END PGP SIGNATURE-----