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TITLE:
Asterisk UPDTL Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA43429

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43429/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43429

RELEASE DATE:
2011-03-03

DISCUSS ADVISORY:
http://secunia.com/advisories/43429/#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/43429/

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=43429

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:
Some vulnerabilities have been reported in Asterisk, which can be
exploited by malicious people to compromise a vulnerable system.

The vulnerabilities are caused due to boundary errors within the
"decode_open_type()" and "udptl_rx_packet()" functions in
main/udptl.c, which can be exploited to cause heap-based and
stack-based buffer overflows by e.g. sending specially crafted UDPTL
packets to a server performing T.38 pass through or termination.

Successful exploitation requires that the "t38pt_udptl" option is set
to "yes" ("no" by default).

The vulnerabilities are reported in Asterisk Open Source Edition
prior to versions 1.4.39.2, 1.6.1.22, 1.6.2.16.2, and 1.8.2.4 and
Asterisk Business Edition prior to version C.3.6.3.

SOLUTION:
Update to a fixed version or apply patches.

Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://downloads.asterisk.org/pub/security/AST-2011-002.html

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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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.

Subscribe:
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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