ntfs-3g-ntfsprogs: fix CVE-2023-52890

Backport fix from upstream

  https://github.com/tuxera/ntfs-3g/commit/75dcdc2cf37478fad6c0e3427403d198b554951d

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

2 files changed, 43 insertions, 0 deletions

diff --git a/meta-filesystems/recipes-filesystems/ntfs-3g-ntfsprogs/files/0001-unistr.c-Fix-use-after-free-in-ntfs_uppercase_mbs.patch b/meta-filesystems/recipes-filesystems/ntfs-3g-ntfsprogs/files/0001-unistr.c-Fix-use-after-free-in-ntfs_uppercase_mbs.patch
new file mode 100644
index 0000000000..3160f56880
--- /dev/null
+++ b/meta-filesystems/recipes-filesystems/ntfs-3g-ntfsprogs/files/0001-unistr.c-Fix-use-after-free-in-ntfs_uppercase_mbs.patch
@@ -0,0 +1,42 @@
+From 7b6210c5be46e5120b42c09f910e8f104bf3edf1 Mon Sep 17 00:00:00 2001
+From: Erik Larsson <erik@tuxera.com>
+Date: Tue, 13 Jun 2023 17:47:15 +0300
+Subject: [PATCH] unistr.c: Fix use-after-free in 'ntfs_uppercase_mbs'.
+
+If 'utf8_to_unicode' throws an error due to an invalid UTF-8 sequence,
+then 'n' will be less than 0 and the loop will terminate without storing
+anything in '*t'. After the loop the uppercase string's allocation is
+freed, however after it is freed it is unconditionally accessed through
+'*t', which points into the freed allocation, for the purpose of NULL-
+terminating the string. This leads to a use-after-free.
+Fixed by only NULL-terminating the string when no error has been thrown.
+
+Thanks for Jeffrey Bencteux for reporting this issue:
+https://github.com/tuxera/ntfs-3g/issues/84
+
+Upstream-Status: Backport [https://github.com/tuxera/ntfs-3g/commit/75dcdc2cf37478fad6c0e3427403d198b554951d]
+CVE: CVE-2023-52890
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+
+---
+ libntfs-3g/unistr.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/libntfs-3g/unistr.c b/libntfs-3g/unistr.c
+index 5854b3b..db8ddf4 100644
+--- a/libntfs-3g/unistr.c
++++ b/libntfs-3g/unistr.c
+@@ -1189,8 +1189,9 @@ char *ntfs_uppercase_mbs(const char *low,
+                        free(upp);
+                        upp = (char*)NULL;
+                        errno = EILSEQ;
++               } else {
++                       *t = 0;
+                }
+-               *t = 0;
+        }
+        return (upp);
+ }
+-- 
+2.34.1
+
diff --git a/meta-filesystems/recipes-filesystems/ntfs-3g-ntfsprogs/ntfs-3g-ntfsprogs_2022.10.3.bb b/meta-filesystems/recipes-filesystems/ntfs-3g-ntfsprogs/ntfs-3g-ntfsprogs_2022.10.3.bb
index 37a8106bb0..be2a5245ce 100644
--- a/meta-filesystems/recipes-filesystems/ntfs-3g-ntfsprogs/ntfs-3g-ntfsprogs_2022.10.3.bb
+++ b/meta-filesystems/recipes-filesystems/ntfs-3g-ntfsprogs/ntfs-3g-ntfsprogs_2022.10.3.bb
@@ -8,6 +8,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=59530bdf33659b29e73d4adb9f9f6552 \
 
 SRC_URI = "http://tuxera.com/opensource/ntfs-3g_ntfsprogs-${PV}.tgz \
            file://0001-libntfs-3g-Makefile.am-fix-install-failed-while-host.patch \
+           file://0001-unistr.c-Fix-use-after-free-in-ntfs_uppercase_mbs.patch \
 "
 S = "${WORKDIR}/ntfs-3g_ntfsprogs-${PV}"
 SRC_URI[sha256sum] = "f20e36ee68074b845e3629e6bced4706ad053804cbaf062fbae60738f854170c"