漏洞信息
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Vulnerability Title
Out-of-bounds read in Bluetooth Classic SDP attribute parsing (`bt_sdp_parse_attribute`)
Vulnerability Description
bt_sdp_parse_attribute() in subsys/bluetooth/host/classic/sdp.c validated only that the SDP record buffer held the type-marker byte plus the 2-byte attribute ID (a check of buf->len < 3) but then read a fourth byte, the data-element descriptor (type), via net_buf_simple_pull_u8(). Because net_buf_simple_pull_u8() dereferences buf->data[0] before its only bounds guard (an __ASSERT_NO_MSG that compiles out when CONFIG_ASSERT is disabled, the production default), a record of exactly three bytes (0x09 followed by a 2-byte attribute ID) causes a one-byte read past the end of the logical buffer. The parser is reachable from inbound, remote-controlled data: a Bluetooth BR/EDR peer acting as an SDP server returns discovery-response records that are stored verbatim in the client receive buffer and parsed via the public bt_sdp_get_attr()/bt_sdp_has_attr()/bt_sdp_record_parse() helpers. The over-read is bounded to a single byte that is used only as an internal length selector and is never leaked to the attacker; subsequent length checks then reject the malformed record. Realistic impact is therefore limited to an edge-case denial of service (a fault only if the record ends exactly at a mapped-memory boundary, or a deterministic assert panic when CONFIG_ASSERT=y). Affects Zephyr v4.3.0 and v4.4.0; fixed by adding sizeof(type) to the length check.
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Vulnerability Type
输入验证不恰当
Vulnerability Title
Zephyr Project Zephyr 输入验证错误漏洞
Vulnerability Description
zephyrproject-rtos Zephyr是zephyrproject-rtos的实时操作系统。 Zephyr Project Zephyr 4.4.0及之前版本存在安全漏洞,该漏洞源于SDP解析器中的bt_sdp_parse_attribute函数在接受包含1字节属性类型和2字节属性ID的输入缓冲区后,未验证值类型字节是否存在即无条件拉取额外字节,导致截断的3字节属性在net_buf_simple_pull中触发断言检查并引发内核崩溃,造成拒绝服务;在禁用断言的构建中,解析可能继续超出可用缓冲区
CVSS Information
N/A
Vulnerability Type
N/A