| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2021-47620: Bluetooth: refactor malicious adv data check |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| Bluetooth: refactor malicious adv data check |
| |
| Check for out-of-bound read was being performed at the end of while |
| num_reports loop, and would fill journal with false positives. Added |
| check to beginning of loop processing so that it doesn't get checked |
| after ptr has been advanced. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47620 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.4.302 with commit 305e92f525450f3e1b5f5c9dc7eadb152d66a082 |
| Fixed in 4.9.300 with commit 7889b38a7f21ed19314f83194622b195d328465c |
| Fixed in 4.14.265 with commit 5a539c08d743d9910631448da78af5e961664c0e |
| Fixed in 4.19.228 with commit 8819f93cd4a443dfe547aa622b21f723757df3fb |
| Fixed in 5.4.176 with commit 835d3706852537bf92eb23eb8635b8dee0c0aa67 |
| Fixed in 5.10.96 with commit 83d5196b65d1b29e27d7dd16a3b9b439fb1d2dba |
| Fixed in 5.15.19 with commit bcea886771c3f22a590c8c8b9139a107bd7f1e1c |
| Fixed in 5.16.5 with commit 5c968affa804ba98c3c603f37ffea6fba618025e |
| Fixed in 5.17 with commit 899663be5e75dc0174dc8bda0b5e6826edf0b29a |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2021-47620 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/bluetooth/hci_event.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/305e92f525450f3e1b5f5c9dc7eadb152d66a082 |
| https://git.kernel.org/stable/c/7889b38a7f21ed19314f83194622b195d328465c |
| https://git.kernel.org/stable/c/5a539c08d743d9910631448da78af5e961664c0e |
| https://git.kernel.org/stable/c/8819f93cd4a443dfe547aa622b21f723757df3fb |
| https://git.kernel.org/stable/c/835d3706852537bf92eb23eb8635b8dee0c0aa67 |
| https://git.kernel.org/stable/c/83d5196b65d1b29e27d7dd16a3b9b439fb1d2dba |
| https://git.kernel.org/stable/c/bcea886771c3f22a590c8c8b9139a107bd7f1e1c |
| https://git.kernel.org/stable/c/5c968affa804ba98c3c603f37ffea6fba618025e |
| https://git.kernel.org/stable/c/899663be5e75dc0174dc8bda0b5e6826edf0b29a |
