| 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-2024-41090: tap: add missing verification for short frame |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| tap: add missing verification for short frame |
| |
| The cited commit missed to check against the validity of the frame length |
| in the tap_get_user_xdp() path, which could cause a corrupted skb to be |
| sent downstack. Even before the skb is transmitted, the |
| tap_get_user_xdp()-->skb_set_network_header() may assume the size is more |
| than ETH_HLEN. Once transmitted, this could either cause out-of-bound |
| access beyond the actual length, or confuse the underlayer with incorrect |
| or inconsistent header length in the skb metadata. |
| |
| In the alternative path, tap_get_user() already prohibits short frame which |
| has the length less than Ethernet header size from being transmitted. |
| |
| This is to drop any frame shorter than the Ethernet header size just like |
| how tap_get_user() does. |
| |
| CVE: CVE-2024-41090 |
| |
| The Linux kernel CVE team has assigned CVE-2024-41090 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.20 with commit 0efac27791ee068075d80f07c55a229b1335ce12 and fixed in 5.4.281 with commit 8be915fc5ff9a5e296f6538be12ea75a1a93bdea |
| Issue introduced in 4.20 with commit 0efac27791ee068075d80f07c55a229b1335ce12 and fixed in 5.10.223 with commit 7431144b406ae82807eb87d8c98e518475b0450f |
| Issue introduced in 4.20 with commit 0efac27791ee068075d80f07c55a229b1335ce12 and fixed in 5.15.164 with commit e5e5e63c506b93b89b01f522b6a7343585f784e6 |
| Issue introduced in 4.20 with commit 0efac27791ee068075d80f07c55a229b1335ce12 and fixed in 6.1.102 with commit ee93e6da30377cf2a75e16cd32bb9fcd86a61c46 |
| Issue introduced in 4.20 with commit 0efac27791ee068075d80f07c55a229b1335ce12 and fixed in 6.6.43 with commit aa6a5704cab861c9b2ae9f475076e1881e87f5aa |
| Issue introduced in 4.20 with commit 0efac27791ee068075d80f07c55a229b1335ce12 and fixed in 6.9.12 with commit 73d462a38d5f782b7c872fe9ae8393d9ef5483da |
| Issue introduced in 4.20 with commit 0efac27791ee068075d80f07c55a229b1335ce12 and fixed in 6.10.2 with commit e1a786b9bbb767fd1c922d424aaa8078cc542309 |
| Issue introduced in 4.20 with commit 0efac27791ee068075d80f07c55a229b1335ce12 and fixed in 6.11 with commit ed7f2afdd0e043a397677e597ced0830b83ba0b3 |
| |
| 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-2024-41090 |
| 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/net/tap.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/8be915fc5ff9a5e296f6538be12ea75a1a93bdea |
| https://git.kernel.org/stable/c/7431144b406ae82807eb87d8c98e518475b0450f |
| https://git.kernel.org/stable/c/e5e5e63c506b93b89b01f522b6a7343585f784e6 |
| https://git.kernel.org/stable/c/ee93e6da30377cf2a75e16cd32bb9fcd86a61c46 |
| https://git.kernel.org/stable/c/aa6a5704cab861c9b2ae9f475076e1881e87f5aa |
| https://git.kernel.org/stable/c/73d462a38d5f782b7c872fe9ae8393d9ef5483da |
| https://git.kernel.org/stable/c/e1a786b9bbb767fd1c922d424aaa8078cc542309 |
| https://git.kernel.org/stable/c/ed7f2afdd0e043a397677e597ced0830b83ba0b3 |
