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zlib: fix CVE-2014-9485

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Directory traversal vulnerability in the do_extract_currentfile
function in miniunz.c in miniunzip in minizip before 1.1-5 might
allow remote attackers to write to arbitrary files via a crafted
entry in a ZIP archive.

Reference:
https://security-tracker.debian.org/tracker/CVE-2014-9485

Upstream-patch:
14a5f8f266

(From OE-Core rev: 32c4b28fc06e39ab8ef86aebc5e1e1ae19934495)

Signed-off-by: Divya Chellam <divya.chellam@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Divya Chellam
2025-03-27 11:16:08 +00:00
committed by Steve Sakoman
parent ccd6eee7fc
commit 68c9f9f449
2 changed files with 65 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

64
meta/recipes-core/zlib/zlib/CVE-2014-9485.patch Normal file
View File

@@ -0,0 +1,64 @@
From 14a5f8f266c16c87ab6c086fc52b770b27701e01 Mon Sep 17 00:00:00 2001
From: Matt Wilson <msw@amazon.com>
Date: Wed, 17 Jan 2024 14:46:18 -0800
Subject: [PATCH] Neutralize zip file traversal attacks in miniunz.
Archive formats such as .zip files are generally susceptible to
so-called "traversal attacks". This allows an attacker to craft
an archive that writes to unexpected locations of the file system
(e.g., /etc/shadow) if an unspecting root user were to unpack a
malicious archive.
This patch neutralizes absolute paths such as /tmp/moo and deeply
relative paths such as dummy/../../../../../../../../../../tmp/moo
The Debian project requested CVE-2014-9485 be allocated for the
first identified weakness. The fix was incomplete, resulting in a
revised patch applied here. Since there wasn't an updated version
released by Debian with the incomplete fix, I suggest we use this
CVE to identify both issues.
Link: https://security.snyk.io/research/zip-slip-vulnerability
Link: https://bugs.debian.org/774321
Link: https://bugs.debian.org/776831
Link: https://nvd.nist.gov/vuln/detail/CVE-2014-9485
Reported-by: Jakub Wilk <jwilk@debian.org>
Fixed-by: Michael Gilbert <mgilbert@debian.org>
CVE: CVE-2014-9485
Upstream-Status: Backport [https://github.com/madler/zlib/commit/14a5f8f266c16c87ab6c086fc52b770b27701e01]
Signed-off-by: Divya Chellam <divya.chellam@windriver.com>
---
contrib/minizip/miniunz.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/contrib/minizip/miniunz.c b/contrib/minizip/miniunz.c
index 3d65401..479e475 100644
--- a/contrib/minizip/miniunz.c
+++ b/contrib/minizip/miniunz.c
@@ -367,6 +367,20 @@ int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite,password)
else
write_filename = filename_withoutpath;
+ if (write_filename[0]!='\0')
+ {
+ const char* relative_check = write_filename;
+ while (relative_check[1]!='\0')
+ {
+ if (relative_check[0]=='.' && relative_check[1]=='.')
+ write_filename = relative_check;
+ relative_check++;
+ }
+ }
+
+ while (write_filename[0]=='/' || write_filename[0]=='.')
+ write_filename++;
+
err = unzOpenCurrentFilePassword(uf,password);
if (err!=UNZ_OK)
{
--
2.40.0

1
meta/recipes-core/zlib/zlib_1.2.11.bb
View File

@@ -13,6 +13,7 @@ SRC_URI = "${SOURCEFORGE_MIRROR}/libpng/${BPN}/${PV}/${BPN}-${PV}.tar.xz \
file://run-ptest \
file://CVE-2022-37434.patch \
file://CVE-2023-45853.patch \
file://CVE-2014-9485.patch \
"
UPSTREAM_CHECK_URI = "http://zlib.net/"