CVE-2024-45023
Description
A flaw was found in the md/raid1 component of the Linux kernel. This vulnerability allows a local attacker with elevated privileges to cause data corruption in a degraded RAID1 array. The read_balance() function, responsible for balancing read operations across disks, can incorrectly read unrecovered data from a disk that is still in the recovery process, particularly when valid data resides on slower disks. This issue stems from a missing recovery check in the choose_bb_rdev() and choose_slow_rdev() functions.
Statement
Accessing storage device will need some extra privilege and hence impact of this issue is considered to be Moderate.
Mitigation
To mitigate this issue, systems not utilizing software RAID1 can prevent the `raid1` kernel module from loading. This can be achieved by creating a blacklist rule.
Create a file `/etc/modprobe.d/disable-raid1.conf` with the following content:
`blacklist raid1`
After creating the file, regenerate the initramfs and reboot the system for the changes to take effect. For Red Hat Enterprise Linux 7 and 8, use `dracut -f -v`. For Red Hat Enterprise Linux 6, use `mkinitrd -f -v`.
This action may impact systems relying on software RAID1 functionality and requires a system reboot to apply.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.7 | 7.1 | 7.8 |
| Attack Vector | Local | Local | Local |
| Attack Complexity | Low | Low | Low |
| Privileges Required | High | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | High | None | High |
| Integrity Impact | High | High | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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