From: fredrik <fredrik@959494ce-11ee-0310-bf91-de5d638817bd>
Date: Thu, 12 Jan 2006 16:49:35 +0000 (+0000)
Subject: Add potential buffer overrun check.
X-Git-Url: http://dolda2000.com/gitweb/?p=icmp-dn.git;a=commitdiff_plain;h=9533e44b92c3e098e640d1dabd44b3c58741dea1

Add potential buffer overrun check.


git-svn-id: svn+ssh://svn.dolda2000.com/srv/svn/repos/src/icmp-dn@546 959494ce-11ee-0310-bf91-de5d638817bd
---

diff --git a/src/idnlookup.c b/src/idnlookup.c
index c384796..0fd367f 100644
--- a/src/idnlookup.c
+++ b/src/idnlookup.c
@@ -78,6 +78,10 @@ void printdn(FILE *f, unsigned char *dnbuf, size_t size, int onlyfirst)
 		fprintf(stderr, "domain name decompression not implemented, aborting\n");
 		exit(1);
 	    }
+	    if((int)*p + (p - dnbuf) >= size) {
+		fprintf(stderr, "malformed domain name\n");
+		return;
+	    }
 	    fprintf(f, "%.*s", (int)*p, p + 1);
 	    p += 1 + (int)*p;
 	    if(*p != 0)