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. Example: http://asterisk.example.org/cgi-bin/vmail.cgi?action=audio& \ folder=../201/INBOX&mailbox=200&context=default&password=12345 \ &msgid=0001&format=wav This will return /var/spool/asterisk/voicemail/default/201/INBOX/msg0001.wav when logged in as the 'extension 200' user. 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
patch: http://cvsweb.digium.com/index.cgi/asterisk/contrib/scripts/vmail.cgi.diff?r1=1.15;r2=1.16
fyi installed on my system with asterisk-1.0.9-r1: /usr/share/doc/asterisk-1.0.9-r1/cgi/vmail.cgi /usr/share/doc/asterisk-1.0.9-r1/scripts/vmail.cgi.gz so both will need patching (uncompressed, they are identical; so maybe we should install just one). patch available at: http://cvsweb.digium.com/index.cgi/asterisk/contrib/scripts/vmail.cgi.diff?r1=1.15;r2=1.16 as this is a minor issue, i recommend against at GLSA.
voip team or stkn, plz provide fixed ebuilds - thx
fixed in cvs, all affected * versions have been rev-bumped
Created attachment 72455 [details, diff] vmail.cgi.patch (for older installs) I have a little bit older of an install of asterisk/vmail here in production, so I had to add the untaint() function to the vmail.cgi to work around this.
Looks like all keywords are set, ready for a vote
I tend to vote NO.
vote NO, relatively minor.
Let's just make mine a full NO and close this one without GLSA.
