4574e77f43
This change modifies extb_channel to allow matching users in secret channels, which prevents trivial ban evasion by setting the target channel +s. Information leak due to this change is unlikely since the attacker would have to know that the target channel exists, the name of the channel (or guess it), have a specific user they wanted to know whether was in the channel (and not know already), and the target user would need to have something like autojoin-on-invite enabled (or any of the other various ways hostname cloaking is attacked).
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
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* Channel extban type: matches users who are in a certain channel
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* -- jilles
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*
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* $Id: extb_channel.c 1723 2006-07-06 15:23:58Z jilles $
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*/
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#include "stdinc.h"
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#include "modules.h"
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#include "client.h"
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#include "channel.h"
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#include "hash.h"
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#include "ircd.h"
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static int _modinit(void);
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static void _moddeinit(void);
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static int eb_channel(const char *data, struct Client *client_p, struct Channel *chptr, long mode_type);
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DECLARE_MODULE_AV1(extb_channel, _modinit, _moddeinit, NULL, NULL, NULL, "$Revision: 1723 $");
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static int
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_modinit(void)
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{
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extban_table['c'] = eb_channel;
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return 0;
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}
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static void
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_moddeinit(void)
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{
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extban_table['c'] = NULL;
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}
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static int eb_channel(const char *data, struct Client *client_p,
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struct Channel *chptr, long mode_type)
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{
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struct Channel *chptr2;
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(void)chptr;
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(void)mode_type;
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if (data == NULL)
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return EXTBAN_INVALID;
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chptr2 = find_channel(data);
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if (chptr2 == NULL)
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return EXTBAN_INVALID;
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/* require consistent target */
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if (chptr->chname[0] == '#' && data[0] == '&')
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return EXTBAN_INVALID;
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return IsMember(client_p, chptr2) ? EXTBAN_MATCH : EXTBAN_NOMATCH;
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}
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