| 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-2021-47476: comedi: ni_usb6501: fix NULL-deref in command paths |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| comedi: ni_usb6501: fix NULL-deref in command paths |
| |
| The driver uses endpoint-sized USB transfer buffers but had no sanity |
| checks on the sizes. This can lead to zero-size-pointer dereferences or |
| overflowed transfer buffers in ni6501_port_command() and |
| ni6501_counter_command() if a (malicious) device has smaller max-packet |
| sizes than expected (or when doing descriptor fuzz testing). |
| |
| Add the missing sanity checks to probe(). |
| |
| The Linux kernel CVE team has assigned CVE-2021-47476 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.18 with commit a03bb00e50ab4c07107da58a52a0bff7943f360c and fixed in 4.4.292 with commit 58478143771b20ab219937b1c30a706590a59224 |
| Issue introduced in 3.18 with commit a03bb00e50ab4c07107da58a52a0bff7943f360c and fixed in 4.9.290 with commit aa39738423503825625853b643b9e99d11c23816 |
| Issue introduced in 3.18 with commit a03bb00e50ab4c07107da58a52a0bff7943f360c and fixed in 4.14.255 with commit df7b1238f3b599a0b9284249772cdfd1ea83a632 |
| Issue introduced in 3.18 with commit a03bb00e50ab4c07107da58a52a0bff7943f360c and fixed in 4.19.217 with commit bc51111bf6e8e7b6cc94b133e4c291273a16acd1 |
| Issue introduced in 3.18 with commit a03bb00e50ab4c07107da58a52a0bff7943f360c and fixed in 5.4.159 with commit b0156b7c9649d8f55a2ce3d3258509f1b2a181c3 |
| Issue introduced in 3.18 with commit a03bb00e50ab4c07107da58a52a0bff7943f360c and fixed in 5.10.79 with commit ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1 |
| Issue introduced in 3.18 with commit a03bb00e50ab4c07107da58a52a0bff7943f360c and fixed in 5.14.18 with commit 4a9d43cb5d5f39fa39fc1da438517004cc95f7ea |
| Issue introduced in 3.18 with commit a03bb00e50ab4c07107da58a52a0bff7943f360c and fixed in 5.15.2 with commit d6a727a681a39ae4f73081a9bedb45d14f95bdd1 |
| Issue introduced in 3.18 with commit a03bb00e50ab4c07107da58a52a0bff7943f360c and fixed in 5.16 with commit 907767da8f3a925b060c740e0b5c92ea7dbec440 |
| |
| 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-2021-47476 |
| 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: |
| drivers/comedi/drivers/ni_usb6501.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/58478143771b20ab219937b1c30a706590a59224 |
| https://git.kernel.org/stable/c/aa39738423503825625853b643b9e99d11c23816 |
| https://git.kernel.org/stable/c/df7b1238f3b599a0b9284249772cdfd1ea83a632 |
| https://git.kernel.org/stable/c/bc51111bf6e8e7b6cc94b133e4c291273a16acd1 |
| https://git.kernel.org/stable/c/b0156b7c9649d8f55a2ce3d3258509f1b2a181c3 |
| https://git.kernel.org/stable/c/ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1 |
| https://git.kernel.org/stable/c/4a9d43cb5d5f39fa39fc1da438517004cc95f7ea |
| https://git.kernel.org/stable/c/d6a727a681a39ae4f73081a9bedb45d14f95bdd1 |
| https://git.kernel.org/stable/c/907767da8f3a925b060c740e0b5c92ea7dbec440 |
