A design flaw has been found in the TLS and SSL protocol that allows an attacker to inject arbitrary content at the beginning of a TLS/SSL connection. The attack is related to the way how TLS and SSL handle session renegotiations. CVE-2009-3555 has been assigned to this vulnerability. As a partial mitigation against this attack, this apache2 update disables client-initiated renegotiations. This should fix the vulnerability for the majority of Apache configurations in use. NOTE: This is not a complete fix for the problem. The attack is still possible in configurations where the server initiates the renegotiation. This is the case for the following configurations : - - The "SSLVerifyClient" directive is used in a Directory or Location context. - - The "SSLCipherSuite" directive is used in a Directory or Location context. As a workaround, you may rearrange your configuration in a way that SSLVerifyClient and SSLCipherSuite are only used on the server or virtual host level. A complete fix for the problem will require a protocol change. Further information will be included in a separate announcement about this issue. In addition, this update fixes the following issues in Apache"s mod_proxy_ftp: CVE-2009-3094: Insufficient input validation in the mod_proxy_ftp module allowed remote FTP servers to cause a denial of service via a malformed reply to an EPSV command. CVE-2009-3095: Insufficient input validation in the mod_proxy_ftp module allowed remote authenticated attackers to bypass intended access restrictions and send arbitrary FTP commands to an FTP server. For the stable distribution , these problems have been fixed in version 2.2.9-10+lenny6. This version also includes some non-security bug fixes that were scheduled for inclusion in the next stable point release . The oldstable distribution , these problems have been fixed in version 2.2.3-4+etch11. For the testing distribution and the unstable distribution , these problems will be fixed in version 2.2.14-2. This advisory also provides updated apache2-mpm-itk packages which have been recompiled against the new apache2 packages. Updated apache2-mpm-itk packages for the armel architecture are not included yet. They will be released as soon as they become available. We recommend that you upgrade your apache2 and apache2-mpm-itk packages.