Secunia CSI7
Advisories
Research
Forums
Create Profile
Our Commitment
Database
Search
Advisories by Product
Advisories by Vendor
Terminology
Report Vulnerability
Insecure Library Loading
Highly critical

Asterisk Multiple Vulnerabilities

-

Release Date:  2008-03-19    Last Update:  2008-03-20    Views:  9,227

Secunia Advisory SA29426

Where:

From remote

Impact:

Security Bypass, DoS, System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Some vulnerabilities have been reported in Asterisk, which can be exploited by malicious people to bypass certain security restrictions, cause a DoS (Denial of Service), and potentially compromise a vulnerable system.

1) An error within the "ast_rtp_unset_m_type()" function in main/rtp.c when handling of RTP codec payloads can be exploited to write a 0 into certain memory locations by sending a specially crafted SIP packet with SDP containing a payload number greater than 256.

2) A boundary error within the "process_sdp()" function in channels/chan_sip.c when handling of RTP codec payloads can be exploited to cause a stack-based buffer overflow by sending more than 32 RTP payloads.

3) An error within the SIP channel driver when determining if authentication is required can be exploited to perform unauthenticated calls by sending specially crafted From headers to the driver.

Note: A format string error within the "ast_verbose()" logging API call has also been reported by Steve Davies and Brandon Kruse. This can be exploited to crash the application by providing input containing format specifiers, which is later used in the affected API call. However, this only affects Asterisk 1.6.x versions prior to 1.6.0-beta6.


Solution:
Update to a fixed version.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1, 2) Mu Security Research Team
3) Jason Parker

Original Advisory:
Digium:
http://downloads.digium.com/pub/security/AST-2008-002.html
http://downloads.digium.com/pub/security/AST-2008-003.html
http://downloads.digium.com/pub/security/AST-2008-004.html

Mu Security:
http://labs.musecurity.com/advisories/MU-200803-01.txt

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Asterisk Multiple Vulnerabilities

No posts yet

-

You must be logged in to post a comment.



 Products Solutions Customers Partner Resources Company
 
 Corporate
Vulnerability Intelligence Manager (VIM)
Corporate Software Inspector (CSI)
Consumer
Personal Software Inspector (PSI)
Online Software Inspector (OSI)
 Industry
Compliance
Technology
Integration
 Customers
Testimonials
 VARS
MSSP
Technology Partners
References
 Factsheets
Reports
Webinars
Events
 About us
Careers
Memberships
Newsroom


 
© 2002-2014 Secunia ApS - Rued Langgaards Vej 8, 4th floor, DK-2300 Copenhagen, Denmark - +45 7020 5144
Terms & Conditions and Copyright - Privacy - Report Vulnerability