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");
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