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

From: gremlin () gremlin ru
Date: Fri, 23 Dec 2016 23:25:47 +0300

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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Current thread:

[RT-SA-2016-001] Padding Oracle in Apache mod_session_crypto RedTeam Pentesting GmbH (Dec 23)
- Re: [RT-SA-2016-001] Padding Oracle in Apache mod_session_crypto gremlin (Dec 27)
  - Re: [RT-SA-2016-001] Padding Oracle in Apache mod_session_crypto Tim (Dec 27)
    - Re: [RT-SA-2016-001] Padding Oracle in Apache mod_session_crypto Erik Auerswald (Dec 29)
    - Re: [RT-SA-2016-001] Padding Oracle in Apache mod_session_crypto Tim (Dec 30)