Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate advertising TLV before type checks tlv_data_is_valid() reads each advertising data field length from data[i], then inspects data[i + 1] for managed EIR types before checking that the current field still fits inside the supplied buffer. A malformed field whose length byte is the last byte of the buffer can therefore make the parser read one byte past the advertising data. KASAN reported the following when a malformed MGMT_OP_ADD_ADVERTISING request reached that path: BUG: KASAN: vmalloc-out-of-bounds in tlv_data_is_valid() Read of size 1 Call trace: tlv_data_is_valid() add_advertising() hci_mgmt_cmd() hci_sock_sendmsg() Move the existing element-length check before any type-octet inspection so each non-empty element is proven to contain its type byte before the parser looks at data[i + 1].
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
2bb36870e8cb29949ef9acec37129cd8e70f1857 to < 13ad995071a06570668dd8daab3616c247c72080affected2bb36870e8cb29949ef9acec37129cd8e70f1857 to < 06fcbd79c3c360a50f9be9d370769bbd738d0976affected2bb36870e8cb29949ef9acec37129cd8e70f1857 to < f7093ac233c1e7f51d125534f46067772a113175affected2bb36870e8cb29949ef9acec37129cd8e70f1857 to < 74c08e4db35a476c3462aeb65846f955be732626affected2bb36870e8cb29949ef9acec37129cd8e70f1857 to < 18fea1cb0c2599752e908c8217490f73ddd33e00affected2bb36870e8cb29949ef9acec37129cd8e70f1857 to < 1a3c8ffbb469859b076445af44bdfa6a711d483eaffected2bb36870e8cb29949ef9acec37129cd8e70f1857 to < 2a3f3ed9e198ae23c15859ace2f9ca6cfdc35b57affected2bb36870e8cb29949ef9acec37129cd8e70f1857 to < de23fb62259aa01d294f77238ae3b835eb674413affected
Linux Linux
Default version status: affected
4.9affected0 to < 4.9unaffected5.10.259 to ≤ 5.10.*unaffected5.15.210 to ≤ 5.15.*unaffected6.1.176 to ≤ 6.1.*unaffected6.6.143 to ≤ 6.6.*unaffected6.12.94 to ≤ 6.12.*unaffected6.18.36 to ≤ 6.18.*unaffected7.0.13 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/13ad995071a06570668dd8daab3616c247c72080 ↗
- https://git.kernel.org/stable/c/06fcbd79c3c360a50f9be9d370769bbd738d0976 ↗
- https://git.kernel.org/stable/c/f7093ac233c1e7f51d125534f46067772a113175 ↗
- https://git.kernel.org/stable/c/74c08e4db35a476c3462aeb65846f955be732626 ↗
- https://git.kernel.org/stable/c/18fea1cb0c2599752e908c8217490f73ddd33e00 ↗
- https://git.kernel.org/stable/c/1a3c8ffbb469859b076445af44bdfa6a711d483e ↗
- https://git.kernel.org/stable/c/2a3f3ed9e198ae23c15859ace2f9ca6cfdc35b57 ↗
- https://git.kernel.org/stable/c/de23fb62259aa01d294f77238ae3b835eb674413 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗