CVE-2024-56669

Published: Dic 27, 2024 Last Modified: Feb 11, 2025 EU-VD ID: EUVD-2024-53317
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,8
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

In the Linux kernel, the following vulnerability has been resolved:

iommu/vt-d: Remove cache tags before disabling ATS

The current implementation removes cache tags after disabling ATS,
leading to potential memory leaks and kernel crashes. Specifically,
CACHE_TAG_DEVTLB type cache tags may still remain in the list even
after the domain is freed, causing a use-after-free condition.

This issue really shows up when multiple VFs from different PFs
passed through to a single user-space process via vfio-pci. In such
cases, the kernel may crash with kernel messages like:

BUG: kernel NULL pointer dereference, address: 0000000000000014
PGD 19036a067 P4D 1940a3067 PUD 136c9b067 PMD 0
Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 74 UID: 0 PID: 3183 Comm: testCli Not tainted 6.11.9 #2
RIP: 0010:cache_tag_flush_range+0x9b/0x250
Call Trace:
<TASK>
? __die+0x1f/0x60
? page_fault_oops+0x163/0x590
? exc_page_fault+0x72/0x190
? asm_exc_page_fault+0x22/0x30
? cache_tag_flush_range+0x9b/0x250
? cache_tag_flush_range+0x5d/0x250
intel_iommu_tlb_sync+0x29/0x40
intel_iommu_unmap_pages+0xfe/0x160
__iommu_unmap+0xd8/0x1a0
vfio_unmap_unpin+0x182/0x340 [vfio_iommu_type1]
vfio_remove_dma+0x2a/0xb0 [vfio_iommu_type1]
vfio_iommu_type1_ioctl+0xafa/0x18e0 [vfio_iommu_type1]

Move cache_tag_unassign_domain() before iommu_disable_pci_caps() to fix
it.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0004
Percentile
0,1th
Updated

EPSS Score Trend (Last 90 Days)

401

Missing Release of Memory after Effective Lifetime

Draft
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Other
Potential Impacts:
Dos: Crash, Exit, Or Restart Dos: Instability Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Reduce Performance
Applicable Platforms
Languages: C, C++, Not Language-Specific
Likelihood of Exploit: Medium
View CWE Details
416

Use After Free

Stable
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Availability Confidentiality
Potential Impacts:
Modify Memory Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands
Applicable Platforms
Languages: C, C++, Memory-Unsafe
Likelihood of Exploit: High
View CWE Details
476

NULL Pointer Dereference

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality
Potential Impacts:
Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands Read Memory Modify Memory
Applicable Platforms
Languages: C, C#, C++, Go, Java
Likelihood of Exploit: Medium
View CWE Details
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version 6.13
cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version 6.13
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Operating System

Linux Kernel by Linux

Product Information
Vendor Linux
Product Linux Kernel
Version Range Affected
From 6.10 (inclusive)
To 6.12.6 (exclusive)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://git.kernel.org/stable/c/1f2557e08a617a4b5e92a48a1a9…
Patch
https://git.kernel.org/stable/c/1f2557e08a617a4b5e92a48a1a9a6f86621def18
https://git.kernel.org/stable/c/9a0a72d3ed919ebe6491f527630…
Patch
https://git.kernel.org/stable/c/9a0a72d3ed919ebe6491f527630998be053151d8