From: Rodolfo Quesada Zumbado <rodolfo.zumb...@windriver.com> 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 Signed-off-by: Rodolfo Quesada Zumbado <rodolfo.zumb...@windriver.com> Signed-off-by: Joe Slater <joe.sla...@windriver.com> Signed-off-by: Steve Sakoman <st...@sakoman.com> --- .../tar/tar/CVE-2022-48303.patch | 43 +++++++++++++++++++ meta/recipes-extended/tar/tar_1.34.bb | 4 +- 2 files changed, 46 insertions(+), 1 deletion(-) create mode 100644 meta/recipes-extended/tar/tar/CVE-2022-48303.patch diff --git a/meta/recipes-extended/tar/tar/CVE-2022-48303.patch b/meta/recipes-extended/tar/tar/CVE-2022-48303.patch new file mode 100644 index 0000000000..b2f40f3e64 --- /dev/null +++ b/meta/recipes-extended/tar/tar/CVE-2022-48303.patch @@ -0,0 +1,43 @@ +From 3da78400eafcccb97e2f2fd4b227ea40d794ede8 Mon Sep 17 00:00:00 2001 +From: Sergey Poznyakoff <g...@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.zumb...@windriver.com> +Signed-off-by: Joe Slater <joe.sla...@windriver.com> +--- + src/list.c | 5 +++-- + 1 file changed, 3 insertions(+), 2 deletions(-)Signed-off-by: Rodolfo Quesada Zumbado <rodolfo.zumb...@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 + diff --git a/meta/recipes-extended/tar/tar_1.34.bb b/meta/recipes-extended/tar/tar_1.34.bb index 7307cd57a2..1ef5fe221e 100644 --- a/meta/recipes-extended/tar/tar_1.34.bb +++ b/meta/recipes-extended/tar/tar_1.34.bb @@ -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" -- 2.34.1
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