From: Miroslav Lichvar <mlichvar@redhat.com>
Date: Wed, 6 Apr 2016 14:38:14 +0000 (+0200)
Subject: cmdparse: check if stratum in local directive is valid
X-Git-Tag: 2.4-pre1~21
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4d1c79580456e859dbebec91d357da81b1f5719d;p=thirdparty%2Fchrony.git

cmdparse: check if stratum in local directive is valid
---

diff --git a/cmdparse.c b/cmdparse.c
index 1f1064a8..b65fd2f5 100644
--- a/cmdparse.c
+++ b/cmdparse.c
@@ -238,7 +238,8 @@ CPS_ParseLocal(char *line, int *stratum, int *orphan, double *distance)
     line = CPS_SplitWord(line);
 
     if (!strcasecmp(cmd, "stratum")) {
-      if (sscanf(line, "%d%n", stratum, &n) != 1)
+      if (sscanf(line, "%d%n", stratum, &n) != 1 ||
+          *stratum >= NTP_MAX_STRATUM || *stratum <= 0)
         return 0;
     } else if (!strcasecmp(cmd, "orphan")) {
       *orphan = 1;