Description
It was found that the OpenSSL library did not properly re-initialize its
internal state in the SSL_library_init() function after previous calls to
the CRYPTO_cleanup_all_ex_data() function, which would cause a memory leak
for each subsequent SSL connection. This flaw could cause server
applications that call those functions during reload, such as a combination
of the Apache HTTP Server, mod_ssl, PHP, and cURL, to consume all available
memory, resulting in a denial of service. (CVE-2009-4355)
Dan Kaminsky found that browsers could accept certificates with MD2 hash
signatures, even though MD2 is no longer considered a cryptographically
strong algorithm. This could make it easier for an attacker to create a
malicious certificate that would be treated as trusted by a browser.
OpenSSL now disables the use of the MD2 algorithm inside signatures by
default. (CVE-2009-2409)