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From eca24c7ddd296fe8dd112fd89fb288411e407379 Mon Sep 17 00:00:00 2001
From: OpenWrt community <openwrt-devel@lists.openwrt.org>
Date: Mon, 30 Oct 2023 14:46:57 +0100
Subject: [PATCH] fix: out-of-bounds read or write and crash
https://nvd.nist.gov/vuln/detail/CVE-2014-9636
CVE: CVE-2014-9636
---
extract.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/extract.c b/extract.c
index ec31e60..d816603 100644
--- a/extract.c
+++ b/extract.c
@@ -2228,6 +2228,7 @@ static int test_compr_eb(__G__ eb, eb_size, compr_offset, test_uc_ebdata)
ulg eb_ucsize;
uch *eb_ucptr;
int r;
+ ush eb_compr_method;
if (compr_offset < 4) /* field is not compressed: */
return PK_OK; /* do nothing and signal OK */
@@ -2244,6 +2245,14 @@ static int test_compr_eb(__G__ eb, eb_size, compr_offset, test_uc_ebdata)
((eb_ucsize > 0L) && (eb_size <= (compr_offset + EB_CMPRHEADLEN))))
return IZ_EF_TRUNC; /* no/bad compressed data! */
+ /* 2014-11-03 Michal Zalewski, SMS.
+ * For STORE method, compressed and uncompressed sizes must agree.
+ * http://www.info-zip.org/phpBB3/viewtopic.php?f=7&t=450
+ */
+ eb_compr_method = makeword( eb + (EB_HEADSIZE + compr_offset));
+ if ((eb_compr_method == STORED) && (eb_size - compr_offset != eb_ucsize))
+ return PK_ERR;
+
if (
#ifdef INT_16BIT
(((ulg)(extent)eb_ucsize) != eb_ucsize) ||
--
|
