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Raise limit for passwd and shadow entry length

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Moreover, include checks to prevent writing entries longer than the
length limit.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1422497

Signed-off-by: Tomáš Mráz <tm@t8m.info>
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
This commit is contained in:
Iker Pedrosa
2022-10-07 12:36:59 +02:00
committed by Iker Pedrosa
parent fbf275da19
commit 16afe18142
5 changed files with 22 additions and 5 deletions
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lib/pwio.c
+4 -1
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@@ -56,7 +56,10 @@ static int passwd_put (const void *ent, FILE * file)
|| (pw->pw_gid == (gid_t)-1)
|| (valid_field (pw->pw_gecos, ":\n") == -1)
|| (valid_field (pw->pw_dir, ":\n") == -1)
|| (valid_field (pw->pw_shell, ":\n") == -1)) {
|| (valid_field (pw->pw_shell, ":\n") == -1)
|| (strlen (pw->pw_name) + strlen (pw->pw_passwd) +
strlen (pw->pw_gecos) + strlen (pw->pw_dir) +
strlen (pw->pw_shell) + 100 > PASSWD_ENTRY_MAX_LENGTH)) {
return -1;
}