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Frost & Sullivan 2011 Report: Secunia Vulnerability Research
\"Frost & Sullivan believes that Secunia continues to be a major player in the vulnerability research market due to its diversity of products that provide best-in-class coverage, quality, and usability.\" This is just one of the key factors that influenced Frost & Sullivan to select Secunia over other companies.
Read the report here:
http://secunia.com/products/corporate/vim/fs_request_2011/


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TITLE:
Asterisk Multiple Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA45048

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45048/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45048

RELEASE DATE:
2011-06-24

DISCUSS ADVISORY:
http://secunia.com/advisories/45048/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/45048/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=45048

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Multiple vulnerabilities have been reported in Asterisk, which can be
exploited by malicious people to cause a DoS (Denial of Service).

1) An input validation error in the "sipsock_read()" function
(channels/chan_sip.c) when processing requests containing a NULL byte
can be exploited to corrupt memory and cause a crash via a specially
crafted SIP packet.

2) A NULL pointer dereference error in the "get_in_brackets_full()"
function (channels/sip/reqresp_parser.c) can be exploited to cause a
crash via a specially crafted SIP "Contact" header.

3) An input validation error in the IAX2 channel driver
(channels/chan_iax2.c) within the "iax2_setoption()" function can be
exploited to access an invalid pointer supplied via a specially
crafted option control frame.

Please see the vendor's advisory for a list of affected versions.

SOLUTION:
Apply updates or patches. Please see the vendor's advisory for
details.

Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

PROVIDED AND/OR DISCOVERED BY:
1) The vendor credits Paul Belanger.
2) The vendor credits jaredmauch.
3) Reported by the vendor.

ORIGINAL ADVISORY:
Asterisk:
http://downloads.asterisk.org/pub/security/AST-2011-008.html
http://downloads.asterisk.org/pub/security/AST-2011-009.html
http://downloads.asterisk.org/pub/security/AST-2011-010.html

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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