From 38386bd482c0a8102a79958cb3eddcb97a167ca3 Mon Sep 17 00:00:00 2001 From: Con Kolivas <kernel@kolivas.org> Date: Fri, 9 Mar 2018 17:39:40 +1100 Subject: [PATCH] CVE-2017-8842 Fix divide-by-zero in bufRead::get --- libzpaq/libzpaq.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libzpaq/libzpaq.h b/libzpaq/libzpaq.h index 93387da..cbe211d 100644 --- a/libzpaq/libzpaq.h +++ b/libzpaq/libzpaq.h @@ -465,7 +465,8 @@ struct bufRead: public libzpaq::Reader { int get() { if (progress && !(*s_len % 128)) { - int pct = (total_len - *s_len) * 100 / total_len; + int pct = (total_len > 0) ? + (total_len - *s_len) * 100 / total_len : 100; if (pct / 10 != *last_pct / 10) { int i;