Date: Sun, 15 Jan 2012 15:48:17 +0100 From: Agostino Sarubbo <ago@...too.org> To: oss-security@...ts.openwall.com Subject: CVE Request for spamdyke "STARTTLS" Plaintext In reference of: http://www.openwall.com/lists/oss-security/2012/01/07/1 : According to secunia security advisory ( https://secunia.com/advisories/47435 ) : Description: A vulnerability has been reported in spamdyke, which can be exploited by malicious people to manipulate certain data. The vulnerability is caused due to the TLS implementation not properly clearing transport layer buffers when upgrading from plaintext to ciphertext after receiving the "STARTTLS" command. This can be exploited to insert arbitrary plaintext data (e.g. SMTP commands) during the plaintext phase, which will then be executed after upgrading to the TLS ciphertext phase. The vulnerability is reported in versions prior to 4.2.1. Solution: Update to version 4.2.1. And from upstream changelog ( http://www.spamdyke.org/documentation/Changelog.txt ): Changed smtp_filter() and middleman() to discard any buffered input after TLS is started. This prevents the injection of commands into a secure session by sending extra input in the same packet as the "STARTTLS" command. Not really a security problem but good practice anyway. Thanks to Eric Shubert for reporting this one. Sorry Kurt, but atm, I have not found the commit code. -- Agostino Sarubbo ago -at- gentoo.org Gentoo/AMD64 Arch Security Liaison GPG: 0x7CD2DC5D [ CONTENT OF TYPE application/pgp-signature SKIPPED ]
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