A vulnerability in OpenSSL could allow an unauthenticated, remote attacker to execute arbitrary code.
The vulnerability is due to improper handling of Datagram Transport Layer Security (DTLS) fragments by a system running the affected application. An unauthenticated, remote attacker could exploit this vulnerability by sending crafted DTLS fragments to a targeted system. A successful exploit could cause a buffer overrun condition that the attacker could use to execute arbitrary code on the system. If OpenSSL is running with elevated privileges on the system, exploitation could result in a complete system compromise.
OpenSSL has confirmed the vulnerability and released software updates.
Indicators of Compromise
The following OpenSSL versions are affected:
OpenSSL versions prior to 0.9.8za
OpenSSL versions prior to 1.0.0m
OpenSSL versions prior to 1.0.1h
The vulnerability is due to improper handling of crafted DTLS fragments by a system running an affected version of OpenSSL.
An unauthenticated, remote attacker could exploit this vulnerability by sending DTLS fragments to a targeted system. A successful exploit could cause a buffer overrun condition that the attacker could use to execute arbitrary code on the system. If OpenSSL is running with elevated privileges on the system, exploitation could result in a complete system compromise.
To exploit this vulnerability, an attacker would need to send crafted DTLS fragments to the targeted device. Depending on where the targeted system resides in an environment, an attacker may need to bypass firewall restrictions or other protection measures, which may reduce the likelihood of a successful exploit.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators are advised to monitor affected systems.
OpenSSL.org has released a security advisory at the following link: CVE-2014-0195
Apple has released a security advisory at the following link: HT6443
BlackBerry has released a security advisory at the following link: KB36051
Blue Coat has released an advisory at the following link: SA80
Red Hat has released updated software for registered subscribers at the following link: Red Hat Network. Red Hat packages can be updated on Red Hat Enterprise Linux versions 5 and later using the yum tool.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.