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OpenSSL DTLS Implementation Vulnerability Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA25878  
Release Date: 2007-10-12

Critical:
Highly critical
Impact: DoS
System access
Where: From remote
Solution Status: Vendor Patch

Software:OpenSSL 0.9.x

CVE reference:CVE-2007-4995 (Secunia mirror)

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Description:
Andy Polyakov has reported a vulnerability in OpenSSL, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.

The vulnerability is caused due to an unspecified error within the DTLS implementation. Successful exploitation may allow the execution of arbitrary code.

Note: Reportedly, this vulnerability affects only clients and servers explicitly using DTLS.

The vulnerability is reported in all versions of 0.9.8 prior to 0.9.8f.

Solution:
Update to version 0.9.8f and rebuild all packages using OpenSSL for DTLS.

Provided and/or discovered by:
Andy Polyakov

Original Advisory:
http://www.openssl.org/news/secadv_20071012.txt

Extended Solution:
The "Extended Solution" section is available for Secunia customers only. Request a trial and get access to the Secunia Customer Area and Extended Secunia advisories.



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

12 Related Secunia Security Advisories, displaying 10

1. OpenSSL Two Denial of Service Vulnerabilities
2. OpenSSL Multiple Vulnerabilities
3. OpenSSL RSA Signature Forgery Vulnerability
4. OpenSSL Potential SSL 2.0 Rollback Vulnerability
5. OpenSSL "der_chop" Script Insecure Temporary File Creation
6. OpenSSL SSL/TLS Handshake Denial of Service Vulnerabilities
7. OpenSSL ASN.1 Parsing Denial of Service Vulnerability
8. OpenSSL Multiple Vulnerabilities in Client Certificate Handling
9. OpenSSL retrieval of premaster-secret
10. OpenSSL RSA blinding attack

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