svn commit: r303298 - head/usr.bin/bsdiff/bspatch

[Xin LI]

Author: delphij
Date: Mon Jul 25 14:45:48 2016
New Revision: 303298
URL: https://svnweb.freebsd.org/changeset/base/303298

Log:
  Fix bspatch heap overflow vulnerability.
  
  Obtained from:	Chromium
  Reported by:	Lu Tung-Pin
  Security:	FreeBSD-SA-16:25.bspatch

Modified:
  head/usr.bin/bsdiff/bspatch/bspatch.c

Modified: head/usr.bin/bsdiff/bspatch/bspatch.c
==============================================================================
--- head/usr.bin/bsdiff/bspatch/bspatch.c	Mon Jul 25 14:36:55 2016	(r303297)
+++ head/usr.bin/bsdiff/bspatch/bspatch.c	Mon Jul 25 14:45:48 2016	(r303298)
@@ -164,6 +164,10 @@ int main(int argc,char * argv[])
 		}
 
 		/* Sanity-check */
+		if ((ctrl[0] < 0) || (ctrl[1] < 0))
+			errx(1,"Corrupt patch\n");
+
+		/* Sanity-check */
 		if(newpos+ctrl[0]>newsize)
 			errx(1,"Corrupt patch\n");