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TITLE:
OpenSSL CMS / PKCS #7 Decryption "Million Message Attack"
Vulnerability

SECUNIA ADVISORY ID:
SA46958

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/46958/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=46958

RELEASE DATE:
2012-03-12

DISCUSS ADVISORY:
http://secunia.com/advisories/46958/#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/46958/

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=46958

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:
A vulnerability has been reported in OpenSSL, which can be exploited
by malicious people to bypass certain security restrictions.

The vulnerability is caused due to an error in the CMS and PKCS #7
decryption code, which can be exploited via a so-called "Million
Message Attack" against CMS, PKCS #7, or S/MIME decryption
operations.

Successful exploitation requires sending on average 2^20 messages,
affecting only automated systems in practise.

SOLUTION:
Update to version 1.0.0h or 0.9.8u.

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

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Ivan Nestlerode.

ORIGINAL ADVISORY:
http://www.openssl.org/news/secadv_20120312.txt

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:
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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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