full-disclosure - Re: [FD] [RT-SA-2016-001] Padding Oracle in Apache mod_session_crypto

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Message-ID: <20161223202547.GA20297@gremlin.ru>
Date: Fri, 23 Dec 2016 23:25:47 +0300
From: gremlin@...mlin.ru
To: fulldisclosure@...lists.org
Subject: Re: [FD] [RT-SA-2016-001] Padding Oracle in Apache
	mod_session_crypto

On 2016-12-23 13:28:33 +0100, RedTeam Pentesting GmbH wrote:

 > res = apr_crypto_passphrase(&key, &ivSize, passphrase,
 > strlen(passphrase), (unsigned char *) (&salt), sizeof(apr_uuid_t),
 > *cipher, APR_MODE_CBC, 1, 4096, f, r->pool);

CBC. Again.

The earliest mention of CFB which I know is dated 1989.
The earliest mention of CTR which I know is dated 1990-ies.

But there still are people who use CBC...

Please, PLEASE, PPLEEEEAASSSE don't use it. Instead, use either
Blowfish in CFB mode or at least Rijndael (AES) in CTR (or GCM)
mode - both are available, for example, in the OpenSSL library.

-- 
Alexey V. Vissarionov aka Gremlin from Kremlin
GPG: 8832FE9FA791F7968AC96E4E909DAC45EF3B1FA8

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