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Showing posts with the label ssl exploit

An explanation of webserver logs that contain requests such as "\x16\x03\x01"

Recently I have started coming across somewhat unusual entries in the access and error logs for a few of the Apache web servers that I am responsible for maintaining. The entries look like this: - - [03/Nov/2015:13:56:23 -0500] "\x16\x03\x02\x01o\x01" 400 226 "-" "-" Here is another example: - - [03/Nov/2015:23:48:54 -0500] "\x16\x03\x01" 400 226 "-" "-" These errors will be generated on a website configured to use SSL - and in fact, error messages similar to these can be generated by misconfiguring SSL for your website. This error message, for instance, can indicate an attempt to access Apache through SSL while the OpenSSL engine is either disabled or misconfigured: Invalid method in request \x80g\x01\x03 Connections that generate that error would not be successful. This post, however, assumes that your website is working normally when used normally. So what gives? The error indicates

Amazon Finally Ditches SSLv3

Amazon S3 subscribers recently received a form letter like this one: Dear AWS Customer, This message explains some security improvements in our services. Your security is important to us. Please review the entire message carefully to determine whether your use of the services will be affected, and if so what you need to do. As of 12:00 AM PDT May 20, 2015, AWS will discontinue support of SSLv3 for securing connections to S3 buckets. Security research published late last year demonstrated that SSLv3 contained weaknesses in its ability to protect and secure communications. These weaknesses have been addressed in Transport Layer Security (TLS), which is the replacement for SSL. Consistent with our top priority to protect AWS customers, AWS will only support versions of the more modern TLS rather than SSLv3. You are receiving this email because some of your users are accessing Amazon S3 using a browser configured to use SSLv3, or some of your existing applications that use Amazon S3 a