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Message-ID: <2024102138-CVE-2024-49997-0d01@gregkh> Date: Mon, 21 Oct 2024 20:03:25 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-49997: net: ethernet: lantiq_etop: fix memory disclosure Description =========== In the Linux kernel, the following vulnerability has been resolved: net: ethernet: lantiq_etop: fix memory disclosure When applying padding, the buffer is not zeroed, which results in memory disclosure. The mentioned data is observed on the wire. This patch uses skb_put_padto() to pad Ethernet frames properly. The mentioned function zeroes the expanded buffer. In case the packet cannot be padded it is silently dropped. Statistics are also not incremented. This driver does not support statistics in the old 32-bit format or the new 64-bit format. These will be added in the future. In its current form, the patch should be easily backported to stable versions. Ethernet MACs on Amazon-SE and Danube cannot do padding of the packets in hardware, so software padding must be applied. The Linux kernel CVE team has assigned CVE-2024-49997 to this issue. Affected and fixed versions =========================== Issue introduced in 3.0 with commit 504d4721ee8e and fixed in 5.10.227 with commit 185df159843d Issue introduced in 3.0 with commit 504d4721ee8e and fixed in 5.15.168 with commit 469856f76f48 Issue introduced in 3.0 with commit 504d4721ee8e and fixed in 6.1.113 with commit 2bf4c101d7c9 Issue introduced in 3.0 with commit 504d4721ee8e and fixed in 6.6.55 with commit e66e38d07b31 Issue introduced in 3.0 with commit 504d4721ee8e and fixed in 6.10.14 with commit 1097bf16501e Issue introduced in 3.0 with commit 504d4721ee8e and fixed in 6.11.3 with commit 431b122933b1 Issue introduced in 3.0 with commit 504d4721ee8e and fixed in 6.12-rc2 with commit 45c0de18ff2d 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-2024-49997 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/ethernet/lantiq_etop.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/185df159843d30fb71f821e7ea4368c2a3bfcd36 https://git.kernel.org/stable/c/469856f76f4802c5d7e3d20e343185188de1e2db https://git.kernel.org/stable/c/2bf4c101d7c99483b8b15a0c8f881e3f399f7e18 https://git.kernel.org/stable/c/e66e38d07b31e177ca430758ed97fbc79f27d966 https://git.kernel.org/stable/c/1097bf16501ed5e35358d848b0a94ad2830b0f65 https://git.kernel.org/stable/c/431b122933b197820d319eb3987a67d04346ce9e https://git.kernel.org/stable/c/45c0de18ff2dc9af01236380404bbd6a46502c69
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