1From a8ce86155076505d0d6e3d8a3e44c26bb89d9524 Mon Sep 17 00:00:00 2001
 2From: "Steven M. Schweda" <sms@antinode.info>
 3Date: Sat, 15 Jun 2019 18:13:11 -0700
 4Subject: [PATCH] Fix CVE-2014-8140: out-of-bounds write issue in
 5 test_compr_eb()
 6
 7---
 8 extract.c | 13 ++++++++++---
 9 1 file changed, 10 insertions(+), 3 deletions(-)
10
11diff --git a/extract.c b/extract.c
12index df0fa1c..ec31e60 100644
13--- a/extract.c
14+++ b/extract.c
15@@ -2232,10 +2232,17 @@ static int test_compr_eb(__G__ eb, eb_size, compr_offset, test_uc_ebdata)
16     if (compr_offset < 4)                /* field is not compressed: */
17         return PK_OK;                    /* do nothing and signal OK */
18 
19+    /* Return no/bad-data error status if any problem is found:
20+     *    1. eb_size is too small to hold the uncompressed size
21+     *       (eb_ucsize).  (Else extract eb_ucsize.)
22+     *    2. eb_ucsize is zero (invalid).  2014-12-04 SMS.
23+     *    3. eb_ucsize is positive, but eb_size is too small to hold
24+     *       the compressed data header.
25+     */
26     if ((eb_size < (EB_UCSIZE_P + 4)) ||
27-        ((eb_ucsize = makelong(eb+(EB_HEADSIZE+EB_UCSIZE_P))) > 0L &&
28-         eb_size <= (compr_offset + EB_CMPRHEADLEN)))
29-        return IZ_EF_TRUNC;               /* no compressed data! */
30+     ((eb_ucsize = makelong( eb+ (EB_HEADSIZE+ EB_UCSIZE_P))) == 0L) ||
31+     ((eb_ucsize > 0L) && (eb_size <= (compr_offset + EB_CMPRHEADLEN))))
32+        return IZ_EF_TRUNC;             /* no/bad compressed data! */
33 
34     if (
35 #ifdef INT_16BIT
36-- 
372.20.1
38