Home / vulnerabilities Secunia Security Advisory 43722
Posted on 18 March 2011
Source : packetstormsecurity.org Link
----------------------------------------------------------------------
Meet Secunia @ Microsoft Management Summit (MMS) in Las Vegas, USA (21-25 March).
http://secunia.com/company/events/mms_2011/
----------------------------------------------------------------------
TITLE:
Asterisk Two Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA43722
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43722/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43722
RELEASE DATE:
2011-03-17
DISCUSS ADVISORY:
http://secunia.com/advisories/43722/#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/43722/
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=43722
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:
Two vulnerabilities have been reported in Asterisk, which can be
exploited by malicious people to cause a DoS (Denial of Service).
1) The Asterisk Manager Interface does not properly handle failed
writes to manager clients, which can be exploited to cause a CPU and
memory exhaustion by opening, sending invalid data, and closing
multiple connections in a short period of time.
Successful exploitation requires that the manager interface is
enabled (disabled by default).
2) A NULL pointer dereference error within the
"handle_tcptls_connection()" function in main/tcptls.c can be
exploited to cause a crash by opening multiple connections to
services using the "ast_tcptls_*" API (e.g. chan_sip, manager, and
res_phoneprov) in a short period of time.
The vulnerabilities are reported in Asterisk Open Source versions
1.6.1.x prior to 1.6.1.23, 1.6.2.x prior to 1.6.2.17.1, and 1.8.x
prior to 1.8.3.1.
SOLUTION:
Update to versions 1.6.1.23, 1.6.2.17.1, or 1.8.3.1 or apply
patches.
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) Blake Cornell
2) Blake Cornell and Chris Maj
ORIGINAL ADVISORY:
1) http://downloads.asterisk.org/pub/security/AST-2011-003.html
2) http://downloads.asterisk.org/pub/security/AST-2011-004.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/
----------------------------------------------------------------------
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.
----------------------------------------------------------------------
Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org
----------------------------------------------------------------------
