CVE-2024-49997: net: ethernet: lantiq_etop: fix memory disclosure
First published: Mon Oct 21 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=3.0<5.10.227 | |
| Linux Kernel | >=5.11<5.15.168 | |
| Linux Kernel | >=5.16<6.1.113 | |
| Linux Kernel | >=6.2<6.6.55 | |
| Linux Kernel | >=6.7<6.10.14 | |
| Linux Kernel | >=6.11<6.11.3 | |
| Linux Kernel | =6.12-rc1 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/1097bf16501ed5e35358d848b0a94ad2830b0f65
- https://git.kernel.org/stable/c/185df159843d30fb71f821e7ea4368c2a3bfcd36
- https://git.kernel.org/stable/c/2bf4c101d7c99483b8b15a0c8f881e3f399f7e18
- https://git.kernel.org/stable/c/431b122933b197820d319eb3987a67d04346ce9e
- https://git.kernel.org/stable/c/45c0de18ff2dc9af01236380404bbd6a46502c69
- https://git.kernel.org/stable/c/469856f76f4802c5d7e3d20e343185188de1e2db
- https://git.kernel.org/stable/c/60c068444c20bf9a3e22b65b5f6f3d9edc852931
- https://git.kernel.org/stable/c/905f06a34f960676e7dc77bea00f2f8fe18177ad
- https://git.kernel.org/stable/c/e66e38d07b31e177ca430758ed97fbc79f27d966
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49997
- https://nvd.nist.gov/vuln/detail/CVE-2024-49997
- https://launchpad.net/bugs/cve/CVE-2024-49997
- https://security-tracker.debian.org/tracker/CVE-2024-49997
- https://ubuntu.com/security/CVE-2024-49997
- https://git.kernel.org/linus/45c0de18ff2dc9af01236380404bbd6a46502c69
Frequently Asked Questions
What is the severity of CVE-2024-49997?
CVE-2024-49997 is classified with a medium severity level due to the potential for memory disclosure.
How do I fix CVE-2024-49997?
To mitigate CVE-2024-49997, upgrade the Linux kernel to a patched version as specified in the official announcements.
Which Linux kernel versions are affected by CVE-2024-49997?
CVE-2024-49997 affects Linux kernel versions from 3.0 up to 6.10 and certain versions of 6.11 and 6.12-rc1.
What type of vulnerability is CVE-2024-49997?
CVE-2024-49997 is a memory disclosure vulnerability that occurs due to improper padding in the Ethernet driver.
Is there a workaround for CVE-2024-49997?
There are no specific workarounds for CVE-2024-49997; the recommended action is to apply the available updates.
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