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bzip2: Fix CVE-2019-12900

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Added patch for CVE-2019-12900 as backport from upstream.
Fixes out of bound access discovered while fuzzying karchive.

Tested by: Sana.Kazi@kpit.com

(From OE-Core rev: aec10c9993f04304466e15ea7a5bc4d85a357c5b)

Signed-off-by: Saloni Jain <Saloni.Jain@kpit.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Sana Kazi
2020-02-04 07:06:05 -08:00
committed by Richard Purdie
parent e547b2c85f
commit 175e6cb75c
1 changed files with 36 additions and 0 deletions
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36
meta/recipes-extended/bzip2/bzip2-1.0.6/CVE-2019-12900.patch Normal file
View File

@@ -0,0 +1,36 @@
From 74de1e2e6ffc9d51ef9824db71a8ffee5962cdbc Mon Sep 17 00:00:00 2001
From: Albert Astals Cid <aacid@kde.org>
Date: Tue, 28 May 2019 19:35:18 +0200
Subject: [PATCH] Make sure nSelectors is not out of range
nSelectors is used in a loop from 0 to nSelectors to access selectorMtf
which is
UChar selectorMtf[BZ_MAX_SELECTORS];
so if nSelectors is bigger than BZ_MAX_SELECTORS it'll do an invalid memory
access
Fixes out of bounds access discovered while fuzzying karchive
Link: https://gitlab.com/federicomenaquintero/bzip2/commit/74de1e2e6ffc9d51ef9824db71a8ffee5962cdbc.patch
Upstream-Status: Backport
CVE: CVE-2019-12900.patch
Signed-off-by: Saloni Jain <Saloni.Jain@kpit.com>
---
decompress.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/decompress.c b/decompress.c
index ab6a624..f3db91d 100644
--- a/decompress.c
+++ b/decompress.c
@@ -287,7 +287,7 @@ Int32 BZ2_decompress ( DState* s )
GET_BITS(BZ_X_SELECTOR_1, nGroups, 3);
if (nGroups < 2 || nGroups > 6) RETURN(BZ_DATA_ERROR);
GET_BITS(BZ_X_SELECTOR_2, nSelectors, 15);
- if (nSelectors < 1) RETURN(BZ_DATA_ERROR);
+ if (nSelectors < 1 || nSelectors > BZ_MAX_SELECTORS) RETURN(BZ_DATA_ERROR);
for (i = 0; i < nSelectors; i++) {
j = 0;
while (True) {
--
2.22.0