From: Florian Weimer <fweimer@redhat.com>
Date: Mon, 12 Jul 2021 05:58:07 +0000 (+0200)
Subject: nis: nis_local_group may read from __nisgroup[-1] (bug 28075)
X-Git-Tag: glibc-2.34~98
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=70099c7763b8c47a4bb1eef1c41601c602a83270;p=thirdparty%2Fglibc.git

nis: nis_local_group may read from __nisgroup[-1] (bug 28075)

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
---

diff --git a/nis/nis_local_names.c b/nis/nis_local_names.c
index 080dcf88bd6..218764f32e9 100644
--- a/nis/nis_local_names.c
+++ b/nis/nis_local_names.c
@@ -31,6 +31,7 @@ nis_local_group (void)
   char *cptr;
   if (__nisgroup[0] == '\0'
       && (cptr = getenv ("NIS_GROUP")) != NULL
+      && cptr[0] != '\0'
       && strlen (cptr) < NIS_MAXNAMELEN)
     {
       char *cp = stpcpy (__nisgroup, cptr);