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Showing posts from July, 2016

PHP TAR File Parsing Uninitialized Reference (CVE-2016-4343)

A remote, unauthenticated vulnerability exists in PHP. The vulnerability allows an attacker to execute arbitrary code on the web server. CVE-2016-4343 is assigned to this vulnerability. PHP is a server-side scripting language designed for web development but also used as a general-purpose programming language. PHP code may be embedded into HTML code, or it can be used in combination with various web template systems, web content management systems and web frameworks. A remote code execution vulnerability exists in PHP due to lack of proper sanitation when parsing TAR files. It fails to properly validate the values inside the headers found in the file. This allows a remote attacker to create malicious TAR files to cause the vulnerable server to execute code. The following versions of PHP are vulnerable: PHP prior to 5.5.36 PHP prior to 5.6.22 PHP prior to 7.0.7 If your device haven't patch to prevent this vulnerable, this is time to patch now. Source : Dell SonicWa

You Might Not Know You Are Still Using SSLv2.0

Netscape Communications invented Secure Sockets Layer (SSL) protocol in 1994. It has been de facto standard for cryptographic protocol since then. Over the years the protocol has evolved (SSLv2.0 -> SSLv3.0 -> TLSv1.0 -> TLSv1.1 -> TLSv1.2) to increase security. Today, SSLv2.0 no longer provides a sufficiently high level of security. SSLv2.0 deficiencies include the following: Message authentication uses MD5. Most security-aware users have already moved away from any use of MD5. Handshake messages are not protected. This permits a man-in-the-middle to trick the client into picking a weaker cipher suite than it would normally choose. Message integrity and message encryption use the same key, which is a problem if the client and server negotiate a weak encryption algorithm. Sessions can be easily terminated. A man-in-the-middle can easily insert a TCP FIN to close the session, and the peer is unable to determine whether or not it was a legitimate end of the session.