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Secunia Security Advisory 50456

Secunia Security Advisory 50456
Posted Sep 1, 2012
Authored by Secunia | Site secunia.com

Secunia Security Advisory - Two vulnerabilities have been reported in Asterisk, which can be exploited by malicious users to bypass certain security restrictions and compromise a vulnerable system.

tags | advisory, vulnerability
MD5 | aa862e14ef6b8bf316d70c0ed4bb3aa7

Secunia Security Advisory 50456

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TITLE:
Asterisk Two Vulnerabilities

SECUNIA ADVISORY ID:
SA50456

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/50456/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=50456

RELEASE DATE:
2012-08-31

DISCUSS ADVISORY:
http://secunia.com/advisories/50456/#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/50456/

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=50456

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 users to bypass certain security restrictions
and compromise a vulnerable system.

1) An error within the Asterisk Manager Interface when handling
"originate" actions does not properly restrict access and can be
exploited to execute arbitrary shell commands via the “ExternalIVR"
application action.

This is related to vulnerability #1 in:
SA48891

Successful exploitation of this vulnerability requires an attacker to
have the ability to place calls.

2) An error when making IAX2 calls on behalf of a peer may result in
certain ACL rules to be ignored for the call attempt.

Successful exploitation of this vulnerability requires an attacker to
have credentials of a peer defined in a dynamic Asterisk Realtime
Architecture (ARA) backend.

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

SOLUTION:
Apply patches (please see the vendor's advisory for details).

PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) Zubair Ashraf, IBM X-Force Research.
2) Alan Frisch.

ORIGINAL ADVISORY:
http://downloads.asterisk.org/pub/security/AST-2012-012.html
http://downloads.asterisk.org/pub/security/AST-2012-013.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/

----------------------------------------------------------------------

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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