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CVE-2024-35955

Vulnérabilité élevée dans Linux (Linux)

CVSS 8.8 · Élevée
EPSS 1.2%
Linux•Linux•Versions : 6.9, <=6.1.*, <2df2dd27066cdba8041e46a64362325626bdfb2e, a1edb85e60fdab1e14db63ae8af8db3f0d798fb6, 6.6.28, 6a119c1a584aa7a2c6216458f1f272bf1bc93a93, <93eb31e7c3399e326259f2caa17be1e821f5a412, 0, <5.10.216, 4.14.291, 5.19.2, 5.10.216, 4262b6eb057d86c7829168c541654fe0d48fdac8, 28f6c37a2910f565b4f5960df52b2eccae28c891, <=5.10.*, 97e813e6a143edf4208e15c72199c495ed80cea5, <=6.6.*, 6.0, 5.10.137, 6.8.7, 5.4.211, <d15023fb407337028a654237d8968fefdcf87c2f, <36b57c7d2f8b7de224980f1a284432846ad71ca0, <6.0, 5.4.275, 16a544f1e013ba0660612f3fe35393b143b19a84, <=5.4.*, <=4.19.*, 5.15.61, 4.19.256, <=6.8.*, <5.20, 2a49b025c36ae749cee7ccc4b7e456e02539cdc3, <62029bc9ff2c17a4e3a2478d83418ec575413808, <4.19.313, <5.19, <5062d1f4f07facbdade0f402d9a04a788f52e26d, 5.18.18, <5.4.275, 5.15.157, <=*, 6.1.87, <=5.15.*, 1c836bad43f3e2ff71cc397a6e6ccb4e7bd116f8, <325f3fb551f8cd672dbbfc4cf58b14f9ee3fc9e8, <4.15, <b5808d40093403334d939e2c3c417144d12a6f33, <5.15.157, 4.19.313

Description

In the Linux kernel, the following vulnerability has been resolved: kprobes: Fix possible use-after-free issue on kprobe registration When unloading a module, its state is changing MODULE_STATE_LIVE -> MODULE_STATE_GOING -> MODULE_STATE_UNFORMED. Each change will take a time. `is_module_text_address()` and `__module_text_address()` works with MODULE_STATE_LIVE and MODULE_STATE_GOING. If we use `is_module_text_address()` and `__module_text_address()` separately, there is a chance that the first one is succeeded but the next one is failed because module->state becomes MODULE_STATE_UNFORMED between those operations. In `check_kprobe_address_safe()`, if the second `__module_text_address()` is failed, that is ignored because it expected a kernel_text address. But it may have failed simply because module->state has been changed to MODULE_STATE_UNFORMED. In this case, arm_kprobe() will try to modify non-exist module text address (use-after-free). To fix this problem, we should not use separated `is_module_text_address()` and `__module_text_address()`, but use only `__module_text_address()` once and do `try_module_get(module)` which is only available with MODULE_STATE_LIVE.

Gravité et risque d'exploitation

CVE-2024-35955 obtient un score CVSS de 8.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 1.18 %, ce qui la place devant 67.1 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions 6.9, <=6.1.*, <2df2dd27066cdba8041e46a64362325626bdfb2e, a1edb85e60fdab1e14db63ae8af8db3f0d798fb6, 6.6.28, 6a119c1a584aa7a2c6216458f1f272bf1bc93a93, <93eb31e7c3399e326259f2caa17be1e821f5a412, 0, <5.10.216, 4.14.291, 5.19.2, 5.10.216, 4262b6eb057d86c7829168c541654fe0d48fdac8, 28f6c37a2910f565b4f5960df52b2eccae28c891, <=5.10.*, 97e813e6a143edf4208e15c72199c495ed80cea5, <=6.6.*, 6.0, 5.10.137, 6.8.7, 5.4.211, <d15023fb407337028a654237d8968fefdcf87c2f, <36b57c7d2f8b7de224980f1a284432846ad71ca0, <6.0, 5.4.275, 16a544f1e013ba0660612f3fe35393b143b19a84, <=5.4.*, <=4.19.*, 5.15.61, 4.19.256, <=6.8.*, <5.20, 2a49b025c36ae749cee7ccc4b7e456e02539cdc3, <62029bc9ff2c17a4e3a2478d83418ec575413808, <4.19.313, <5.19, <5062d1f4f07facbdade0f402d9a04a788f52e26d, 5.18.18, <5.4.275, 5.15.157, <=*, 6.1.87, <=5.15.*, 1c836bad43f3e2ff71cc397a6e6ccb4e7bd116f8, <325f3fb551f8cd672dbbfc4cf58b14f9ee3fc9e8, <4.15, <b5808d40093403334d939e2c3c417144d12a6f33, <5.15.157, 4.19.313) 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.

Références

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