Linux: Improper Neutralization of Special Elements used in a Command
CVE-2023-52624 is a high-severity improper neutralization of special elements used in a command vulnerability in Linux, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions 2ef98c6d753a744e333b7e34b9cf687040fba57d, e5ffd1263dd5b44929c676171802e7b6af483f21 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.39% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Linux to 2ef98c6d753a744e333b7e34b9cf687040fba57d or e5ffd1263dd5b44929c676171802e7b6af483f21, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.7.3 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c up to, but not including, 2ef98c6d753a744e333b7e34b9cf687040fba57d; 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c up to, but not including, e5ffd1263dd5b44929c676171802e7b6af483f21; 4.15 | 2ef98c6d753a744e333b7e34b9cf687040fba57d, e5ffd1263dd5b44929c676171802e7b6af483f21 |
| Linux | Linux Kernel | before 6.7.3 | 6.7.3 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
Official description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Wake DMCUB before executing GPINT commands [Why] DMCUB can be in idle when we attempt to interface with the HW through the GPINT mailbox resulting in a system hang. [How] Add dc_wake_and_execute_gpint() to wrap the wake, execute, sleep sequence. If the GPINT executes successfully then DMCUB will be put back into sleep after the optional response is returned. It functions similar to the inbox command interface.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of Special Elements used in a Command
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
How developers prevent this class of flaw
- If at all possible, use library calls rather than external processes to recreate the desired functionality.
- If possible, ensure that all external commands called from the program are statically created.
- Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.
More Improper Neutralization of Special Elements used in a Command vulnerabilities (CWE-77)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Recent Improper Neutralization of Special Elements used in a Command vulnerabilities
- 8.1 High severity
- 7.3 High severity
- 8.4 High severity
- 10.0 Critical severity
- 8.8 High severity
- 8.8 High severity
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