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Category:   Application (VPN)  >   Stunnel Vendors:   Stunnel.org
(Stunnel Issues Fix) OpenSSL DTLS Processing Bugs Let Remote Users Deny Service and Execute Arbitrary Code
SecurityTracker Alert ID:  1030417
SecurityTracker URL:  http://securitytracker.com/id/1030417
CVE Reference:   CVE-2014-0195, CVE-2014-0221   (Links to External Site)
Date:  Jun 12 2014
Impact:   Denial of service via network, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two vulnerabilities were reported in OpenSSL. A remote user can execute arbitrary code on the target system. A remote user can cause denial of service conditions. Stunnel is affected.

A remote user can send specially crafted DTLS fragments to the target DTLS client or server to trigger a buffer overflow and execute arbitrary code on the target system [CVE-2014-0195]. Only applications using OpenSSL as a DTLS client or server are affected.

The vendor was notified on April 23, 2014.

Juri Aedla reported this vulnerability (via HP's ZDI).

A remote server can send a specially crafted DTLS handshake to the target DTLS client to trigger a recursion flaw and cause the target service to crash [CVE-2014-0221]. Only applications using OpenSSL as a DTLS client are affected.

The vendor was notified on May 9, 2014.

Imre Rad (Search-Lab Ltd.) reported this vulnerability.

Impact:   A remote user can execute arbitrary code on the target system.

A remote user can cause the target service to crash.

Solution:   Stunnel has issued a fix (5.02).

The Stunnel advisory is available at:

https://www.stunnel.org/sdf_ChangeLog.html

Vendor URL:  www.openssl.org/news/secadv_20140605.txt (Links to External Site)
Cause:   Boundary error, State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry is a follow-up to the message listed below.
Jun 5 2014 OpenSSL DTLS Processing Bugs Let Remote Users Deny Service and Execute Arbitrary Code



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