Slashdot Mirror
OpenSSL Security Vulnerability
SiliconEntity writes "On the heels of multiple OpenSSH vulnerabilities,
the OpenSSL project is now reporting a number of security vulnerabilities of its own. OpenSSL is a standard cryptographic library used in a wide variety of security applications. The new vulnerabilities range from denial-of-service attacks to stack corruption, which imply the possibility of running malicious code. New versions of the software are released today which address the vulnerabilities."
I got annoyed at the slashdot comments last time there was security hole in OpenSSH and wrote this page (copy pasted below). I count OpenSSL as insecure software - we need a secure replacement. GNUTLS looks somewhat better, but I don't trust it too much either.
Why is some software more secure than others?
How do you measure software security?
Here's my definition on what is secure software.
Intro
I get really tired of seeing these kinds of comments every time some widely used software has security holes:
While they may be partially true, I think they're also very misleading and disparages the hard work that some secure software authors have done.
Simplicity Is Security
The difference between secure and insecure software is really the coding techniques being used by it's authors. Authors of secure software do everything they can to prevent accidental mistakes from ever happening. Authors of insecure software just fixes the accidental mistakes. There are very few secure software authors.
Auditing insecure software doesn't make it secure. Sendmail is a good example of this. It's been audited countless times by competent people. The simplest mistakes were catched easily long time ago, but a few very difficult to find vulnerabilities were found only recently.
How do secure software authors then avoid the kind of security holes that are difficult to find? By keeping the code simple. The code doesn't get secure by polluting it with tons of security checks. It gets secure by keeping the security checks in as few places as possible.
Auditing secure software is easy. You can just quickly browse through most of the sources without having to stop and look at it carefully. Everything just looks clean, simple and correct. vsftpd is a good example of this.
Sure, it's still possible that secure software has some security holes occationally. It just happens a lot less often (if ever) and usually the problems are less critical. For example none of the security holes in Postfix have lead to arbitrary code execution or being able to read other peoples mails. Denial of Service attacks are nothing compared to them.
(some examples in the web page not included)