From cb31827d62066a04b02111df3052949fda4b6888 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= Date: Mon, 23 Nov 2015 13:59:43 -0500 Subject: [PATCH] nss-mymachines: do not allow overlong machine names https://github.com/systemd/systemd/issues/2002 --- src/nss-mymachines/nss-mymachines.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/nss-mymachines/nss-mymachines.c b/src/nss-mymachines/nss-mymachines.c index 969fa9619e..c98a959b3b 100644 --- a/src/nss-mymachines/nss-mymachines.c +++ b/src/nss-mymachines/nss-mymachines.c @@ -416,6 +416,9 @@ enum nss_status _nss_mymachines_getpwnam_r( if (!e || e == p) goto not_found; + if (e - p > HOST_NAME_MAX - 1) /* -1 for the last dash */ + goto not_found; + r = parse_uid(e + 1, &uid); if (r < 0) goto not_found; @@ -573,6 +576,9 @@ enum nss_status _nss_mymachines_getgrnam_r( if (!e || e == p) goto not_found; + if (e - p > HOST_NAME_MAX - 1) /* -1 for the last dash */ + goto not_found; + r = parse_gid(e + 1, &gid); if (r < 0) goto not_found;