CVE-2024-26678
Vulnérabilité non évaluée dans Linux (Linux)
Description
In the Linux kernel, the following vulnerability has been resolved: x86/efistub: Use 1:1 file:memory mapping for PE/COFF .compat section The .compat section is a dummy PE section that contains the address of the 32-bit entrypoint of the 64-bit kernel image if it is bootable from 32-bit firmware (i.e., CONFIG_EFI_MIXED=y) This section is only 8 bytes in size and is only referenced from the loader, and so it is placed at the end of the memory view of the image, to avoid the need for padding it to 4k, which is required for sections appearing in the middle of the image. Unfortunately, this violates the PE/COFF spec, and even if most EFI loaders will work correctly (including the Tianocore reference implementation), PE loaders do exist that reject such images, on the basis that both the file and memory views of the file contents should be described by the section headers in a monotonically increasing manner without leaving any gaps. So reorganize the sections to avoid this issue. This results in a slight padding overhead (< 4k) which can be avoided if desired by disabling CONFIG_EFI_MIXED (which is only needed in rare cases these days)
Gravité et risque d'exploitation
CVE-2024-26678 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.22 %, ce qui la place devant 12.3 % des CVE référencées.
Que faire ?
- Vérifiez si Linux (versions 6.8, <=*, 3e3eabe26dc88692d34cf76ca0e0dd331481cc15, <d327e961573fc335af0ae8a160302205327e1f4e, <=6.7.*, 686b58ce5052842bd34ea94870a2671317331716, 6.7.5, <6.7, 6.7, 0, c4421279b6c278efe129bde7abc64af59ea2dfbd, <1ad55cecf22f05f1c884adf63cc09d3c3e609ebf, <4adeeff8c12321cd453412a659c3c0eeb9bb2397, <0a962f2fbaa976af9eed21d0306370cded485787) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.