Home / vulnerabilities Secunia Security Advisory 46168
Posted on 30 September 2011
Source : packetstormsecurity.org Link
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TITLE:
Microsoft Windows SSL/TLS Initialization Vector Selection Weakness
SECUNIA ADVISORY ID:
SA46168
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/46168/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=46168
RELEASE DATE:
2011-09-29
DISCUSS ADVISORY:
http://secunia.com/advisories/46168/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
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http://secunia.com/advisories/46168/
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https://ca.secunia.com/?page=viewadvisory&vuln_id=46168
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
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DESCRIPTION:
A weakness has been reported in Microsoft Windows, which can be
exploited by malicious people to disclose potentially sensitive
information and hijack a user's session.
The weakness is caused due to a design error in the Secure Sockets
Layer 3.0 (SSL) and Transport Layer Security 1.0 (TLS) protocols when
selecting a Initialization Vector (IV) used with symmetric cipher
suites in CBC mode (e.g. AES). This can be exploited to conduct a
chosen-plaintext attack which would allow the decryption of e.g HTTPS
sessions via a Man-in-the-Middle (MitM) attack.
SOLUTION:
As a workaround enable TLS 1.1 or 1.2 (please see the vendor's
advisory for details).
PROVIDED AND/OR DISCOVERED BY:
Reported by Thai Duong and Juliano Rizzo.
ORIGINAL ADVISORY:
Microsoft (KB2588513):
http://technet.microsoft.com/en-us/security/advisory/2588513
Thai Duong:
http://vnhacker.blogspot.com/2011/09/beast.html
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
DEEP LINKS:
Further details available in Customer Area:
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EXTENDED DESCRIPTION:
Further details available in Customer Area:
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EXTENDED SOLUTION:
Further details available in Customer Area:
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EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
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