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Date: Sun, 24 Feb 2013 11:34:47 +0400
From: gremlin@...mlin.ru
To: oss-security@...ts.openwall.com
Subject: nginx CVE-2013-0337 world-readable logs
On 22-Feb-2013 15:46:15 +0400, I wrote:
>> Some distros are affected.
> Alas for them... But the solution is simple.
>> This is not just misconfiguration.
> This issue isn't related to the nginx itself.
> However, I'd agree that nginx could use restrictive mode for
> its' log files:
> +++ nginx-1.2.7/src/core/ngx_log.c
> @@ -325,7 +325,7 @@
> - NGX_FILE_DEFAULT_ACCESS);
> + NGX_FILE_USR_GRP_ACCESS);
I've contacted the nginx team via their security-alert@ and got
the "won't fix" answer by Maxim Dounin:
> We are fine with default permissions used for log files.
> If in a particular configuration stricter permissions are
> required, this may be done either by creating appropriate
> log files with needed permissions, or by restricting access
> to a directory with log files.
Although respecting the umask value could be a better solution
(and I'll try once again to convince the developers in that),
the developers' opinion is clear: pre-creating the logs is the
expected method to fix the ${subject}.
--
Alexey V. Vissarionov aka Gremlin from Kremlin <gremlin ПРИ gremlin ТЧК ru>
GPG key ID: 0xEF3B1FA8, keyserver: hkp://subkeys.pgp.net
GPG key fingerprint: 8832 FE9F A791 F796 8AC9 6E4E 909D AC45 EF3B 1FA8
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