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| author | ru <ru@FreeBSD.org> | 2001-08-21 11:21:08 +0000 |
|---|---|---|
| committer | ru <ru@FreeBSD.org> | 2001-08-21 11:21:08 +0000 |
| commit | 4d0fae19b52489173cbb9c3afb3a755a177b510a (patch) | |
| tree | 49f794eafca9c532240832831509868f5d4cf040 /lib/libalias | |
| parent | 2286423a9940558949a4146502f59590daf55499 (diff) | |
| download | FreeBSD-src-4d0fae19b52489173cbb9c3afb3a755a177b510a.zip FreeBSD-src-4d0fae19b52489173cbb9c3afb3a755a177b510a.tar.gz | |
Close the "IRC DCC" security breach reported recently on Bugtraq.
Submitted by: Makoto MATSUSHITA <matusita@jp.FreeBSD.org>
Diffstat (limited to 'lib/libalias')
| -rw-r--r-- | lib/libalias/alias_irc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/libalias/alias_irc.c b/lib/libalias/alias_irc.c index 6a8ebe2..ec5aa8a 100644 --- a/lib/libalias/alias_irc.c +++ b/lib/libalias/alias_irc.c @@ -236,6 +236,12 @@ lFOUND_CTCP: true_addr.s_addr = htonl(org_addr); destaddr.s_addr = 0; + /* Sanity/Security checking */ + if (!org_addr || !org_port || + pip->ip_src.s_addr != true_addr.s_addr || + org_port < IPPORT_RESERVED) + goto lBAD_CTCP; + /* Steal the FTP_DATA_PORT - it doesn't really matter, and this would probably allow it through at least _some_ firewalls. */ |
