diff options
Diffstat (limited to 'meta/recipes-connectivity/bluez5/bluez5/CVE-2022-0204.patch')
| -rw-r--r-- | meta/recipes-connectivity/bluez5/bluez5/CVE-2022-0204.patch | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/meta/recipes-connectivity/bluez5/bluez5/CVE-2022-0204.patch b/meta/recipes-connectivity/bluez5/bluez5/CVE-2022-0204.patch new file mode 100644 index 0000000000..646b5ddfc8 --- /dev/null +++ b/meta/recipes-connectivity/bluez5/bluez5/CVE-2022-0204.patch @@ -0,0 +1,66 @@ +From 0d328fdf6564b67fc2ec3533e3da201ebabcc9e3 Mon Sep 17 00:00:00 2001 +From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> +Date: Tue, 8 Jun 2021 16:46:49 -0700 +Subject: [PATCH] shared/gatt-server: Fix heap overflow when appending prepare + writes + +The code shall check if the prepare writes would append more the +allowed maximum attribute length. + +Fixes https://github.com/bluez/bluez/security/advisories/GHSA-479m-xcq5-9g2q + +Upstream-Status: Backport [https://github.com/bluez/bluez/commit/591c546c536b42bef696d027f64aa22434f8c3f0] +Signed-off-by: Ralph Siemsen <ralph.siemsen@linaro.org> +CVE: CVE-2022-0204 + +--- + src/shared/gatt-server.c | 22 ++++++++++++++++++++++ + 1 file changed, 22 insertions(+) + +diff --git a/src/shared/gatt-server.c b/src/shared/gatt-server.c +index 0c25a97..20e14bc 100644 +--- a/src/shared/gatt-server.c ++++ b/src/shared/gatt-server.c +@@ -816,6 +816,20 @@ static uint8_t authorize_req(struct bt_gatt_server *server, + server->authorize_data); + } + ++static uint8_t check_length(uint16_t length, uint16_t offset) ++{ ++ if (length > BT_ATT_MAX_VALUE_LEN) ++ return BT_ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LEN; ++ ++ if (offset > BT_ATT_MAX_VALUE_LEN) ++ return BT_ATT_ERROR_INVALID_OFFSET; ++ ++ if (length + offset > BT_ATT_MAX_VALUE_LEN) ++ return BT_ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LEN; ++ ++ return 0; ++} ++ + static void write_cb(struct bt_att_chan *chan, uint8_t opcode, const void *pdu, + uint16_t length, void *user_data) + { +@@ -846,6 +860,10 @@ static void write_cb(struct bt_att_chan *chan, uint8_t opcode, const void *pdu, + (opcode == BT_ATT_OP_WRITE_REQ) ? "Req" : "Cmd", + handle); + ++ ecode = check_length(length, 0); ++ if (ecode) ++ goto error; ++ + ecode = check_permissions(server, attr, BT_ATT_PERM_WRITE_MASK); + if (ecode) + goto error; +@@ -1353,6 +1371,10 @@ static void prep_write_cb(struct bt_att_chan *chan, uint8_t opcode, + util_debug(server->debug_callback, server->debug_data, + "Prep Write Req - handle: 0x%04x", handle); + ++ ecode = check_length(length, offset); ++ if (ecode) ++ goto error; ++ + ecode = check_permissions(server, attr, BT_ATT_PERM_WRITE_MASK); + if (ecode) + goto error; |