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45 lines
1.9 KiB
45 lines
1.9 KiB
6 years ago
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diff -up shadow-4.1.5.1/man/usermod.8.xml.chgrp-guard shadow-4.1.5.1/man/usermod.8.xml
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--- shadow-4.1.5.1/man/usermod.8.xml.chgrp-guard 2016-05-04 13:44:17.267917583 +0200
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+++ shadow-4.1.5.1/man/usermod.8.xml 2016-05-04 13:44:17.284917968 +0200
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@@ -198,6 +198,12 @@
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The group ownership of files outside of the user's home directory
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must be fixed manually.
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</para>
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+ <para>
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+ The change of the group ownership of files inside of the user's
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+ home directory is also not done if the home dir owner uid is
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+ different from the current or new user id. This is safety measure
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+ for special home directories such as <filename>/</filename>.
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+ </para>
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</listitem>
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</varlistentry>
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<varlistentry>
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@@ -364,6 +370,12 @@
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must be fixed manually.
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</para>
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<para>
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+ The change of the user ownership of files inside of the user's
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+ home directory is also not done if the home dir owner uid is
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+ different from the current or new user id. This is safety measure
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+ for special home directories such as <filename>/</filename>.
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+ </para>
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+ <para>
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No checks will be performed with regard to the
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<option>UID_MIN</option>, <option>UID_MAX</option>,
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<option>SYS_UID_MIN</option>, or <option>SYS_UID_MAX</option>
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diff -up shadow-4.1.5.1/src/usermod.c.chgrp-guard shadow-4.1.5.1/src/usermod.c
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--- shadow-4.1.5.1/src/usermod.c.chgrp-guard 2016-05-04 13:44:17.280917877 +0200
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+++ shadow-4.1.5.1/src/usermod.c 2016-05-04 13:44:17.285917991 +0200
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@@ -1971,7 +1971,10 @@ int main (int argc, char **argv)
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}
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if (!mflg && (uflg || gflg)) {
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- if (access (dflg ? user_newhome : user_home, F_OK) == 0) {
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+ struct stat sb;
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+
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+ if (stat (dflg ? user_newhome : user_home, &sb) == 0 &&
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+ ((uflg && sb.st_uid == user_newid) || sb.st_uid == user_id)) {
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/*
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* Change the UID on all of the files owned by
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* `user_id' to `user_newid' in the user's home
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