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tar: CVE-2022-48303

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Fixes CVE-2022-48303 by checking Base-256 encoding is at least
2 bytes long. GNU Tar through 1.34 has a one-byte out-of-bounds
read that results in use of uninitialized memory for a conditional
jump. Exploitation to change the flow of control has not been
demonstrated. The issue occurs in from_header in list.c via a
V7 archive in which mtime has approximately 11 whitespace characters.

Reference:
https://nvd.nist.gov/vuln/detail/CVE-2022-48303

Upstream patch:
https://savannah.gnu.org/bugs/?62387
https://git.savannah.gnu.org/cgit/tar.git/patch/src/list.c?id=3da78400eafcccb97e2f2fd4b227ea40d794ede8

(From OE-Core rev: 5223319b43811228d83c2bdac3e542b9a8852dfd)

Signed-off-by: Rodolfo Quesada Zumbado <rodolfo.zumbado@windriver.com>
Signed-off-by: Joe Slater <joe.slater@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Rodolfo Quesada Zumbado
2023-02-17 15:01:23 -08:00
committed by Richard Purdie
parent c0644f13a7
commit 7b70517743
2 changed files with 46 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
meta/recipes-extended/tar/tar/CVE-2022-48303.patch Normal file
View File

@@ -0,0 +1,43 @@
From 3da78400eafcccb97e2f2fd4b227ea40d794ede8 Mon Sep 17 00:00:00 2001
From: Sergey Poznyakoff <gray@gnu.org>
Date: Sat, 11 Feb 2023 11:57:39 +0200
Subject: Fix boundary checking in base-256 decoder
* src/list.c (from_header): Base-256 encoding is at least 2 bytes
long.
Upstream-Status: Backport [see reference below]
CVE: CVE-2022-48303
Reference to upstream patch:
https://savannah.gnu.org/bugs/?62387
https://git.savannah.gnu.org/cgit/tar.git/patch/src/list.c?id=3da78400eafcccb97e2f2fd4b227ea40d794ede8
Signed-off-by: Rodolfo Quesada Zumbado <rodolfo.zumbado@windriver.com>
Signed-off-by: Joe Slater <joe.slater@windriver.com>
---
src/list.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)Signed-off-by: Rodolfo Quesada Zumbado <rodolfo.zumbado@windriver.com>
(limited to 'src/list.c')
diff --git a/src/list.c b/src/list.c
index 9fafc42..86bcfdd 100644
--- a/src/list.c
+++ b/src/list.c
@@ -881,8 +881,9 @@ from_header (char const *where0, size_t digs, char const *type,
where++;
}
}
- else if (*where == '\200' /* positive base-256 */
- || *where == '\377' /* negative base-256 */)
+ else if (where <= lim - 2
+ && (*where == '\200' /* positive base-256 */
+ || *where == '\377' /* negative base-256 */))
{
/* Parse base-256 output. A nonnegative number N is
represented as (256**DIGS)/2 + N; a negative number -N is
--
cgit v1.1

4
meta/recipes-extended/tar/tar_1.34.bb
View File

@@ -6,7 +6,9 @@ SECTION = "base"
LICENSE = "GPL-3.0-only"
LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504"
SRC_URI = "${GNU_MIRROR}/tar/tar-${PV}.tar.bz2"
SRC_URI = "${GNU_MIRROR}/tar/tar-${PV}.tar.bz2 \
file://CVE-2022-48303.patch \
"
SRC_URI[sha256sum] = "b44cc67f8a1f6b0250b7c860e952b37e8ed932a90bd9b1862a511079255646ff"