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TITLE:
Asterisk Denial of Service and Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA48417

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/48417/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=48417

RELEASE DATE:
2012-03-16

DISCUSS ADVISORY:
http://secunia.com/advisories/48417/#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/48417/

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=48417

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) and
potentially compromise a vulnerable system.

1) An error in the Milliwatt application within the
"milliwatt_generate()" function (apps/app_milliwatt.c) when copying
internal data samples can be exploited to cause a crash via specially
crafted packets.

Successful exploitation if this vulnerability requires that Milliwatt
is using the "o" option.

This vulnerability is reported in versions 1.4.x prior to 1.4.44,
1.6.x prior to 1.6.2.23, 1.8.x prior to 1.8.10.1, and 10.x prior to
10.2.1.

2) An error in the "ast_parse_digest()" function (main/utils.c) when
handling "HTTP Digest Authentication" information can be exploited to
cause a stack-based buffer overflow via an overly long string.

Successful exploitation if this vulnerability may allow execution of
arbitrary code.

This vulnerability is reported in versions 1.8.x prior to 1.8.10.1
and 10.x prior to 10.2.1.

SOLUTION:
Update to a fixed version.

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

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Russell Bryant.

ORIGINAL ADVISORY:
http://downloads.asterisk.org/pub/security/AST-2012-002.html
http://downloads.asterisk.org/pub/security/AST-2012-003.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.

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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