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| /freebsd-10-stable/libexec/ftpd/ | ||
| H A D | ftpchroot.5 | diff 110036 Wed Jan 29 08:07:27 MST 2003 yar Give the code around chroot(2)/chdir(2) a major overhaul by separating its part around chroot(2) from that around initial chdir(2). This makes the below changes really easy. Move seteuid(to user's uid) to before calling chdir(2). There are two goals to achieve by that. First, NFS mounted home directories with restrictive permissions become accessible (local superuser can't access them if not mapped to uid 0 on the remote side explicitly.) Second, all the permissions to the home directory pathname components become effective; previously a user could be carried to any local directory despite its permissions since the chdir(2) was done with euid 0. This reduces possible impact from FTP server misconfiguration, e.g., assigning a wrong home directory to a user. Implement the "/./" feature. Now a guest or user subject to chrooting may have "/./" in his login directory, which separates his chroot directory from his home directory inside the chrooted environment. This works for ftpchroot(5) as well. PR: bin/17843 bin/23944 |
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