CyberSecBulletin
CVE-2024-38552NVD status: Modified

Linux: Improper Validation of Array Index

Published Updated By the CyberSecBulletin desk

CVE-2024-38552 is a high-severity improper validation of array index 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 604c506ca43fce52bb882cff9c1fdf2ec3b4029c, e280ab978c81443103d7c61bdd1d8d708cf6ed6d, 04bc4d1090c343025d69149ca669a27c5b9c34a7 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 0.3% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Linux to 604c506ca43fce52bb882cff9c1fdf2ec3b4029c or e280ab978c81443103d7c61bdd1d8d708cf6ed6d or 04bc4d1090c343025d69149ca669a27c5b9c34a7 or ced9c4e2289a786b8fa684d8893b7045ea53ef7e, whichever matches your release line, or a later version.
  2. Update SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to V1.1.1 or a later version.
  3. Update Linux Kernel to 4.19.316 or 5.4.278 or 5.10.219 or 5.15.161, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxb629596072e5fa901c84f9e88d845a696ee32942 up to, but not including, 604c506ca43fce52bb882cff9c1fdf2ec3b4029c; b629596072e5fa901c84f9e88d845a696ee32942 up to, but not including, e280ab978c81443103d7c61bdd1d8d708cf6ed6d; b629596072e5fa901c84f9e88d845a696ee32942 up to, but not including, 04bc4d1090c343025d69149ca669a27c5b9c34a7; b629596072e5fa901c84f9e88d845a696ee32942 up to, but not including, ced9c4e2289a786b8fa684d8893b7045ea53ef7e; b629596072e5fa901c84f9e88d845a696ee32942 up to, but not including, 98b8a6bfd30d07a19cfacdf82b50f84bf3360869; b629596072e5fa901c84f9e88d845a696ee32942 up to, but not including, 4e8c8b37ee84b3b19c448d2b8e4c916d2f5b9c86; b629596072e5fa901c84f9e88d845a696ee32942 up to, but not including, 123edbae64f4d21984359b99c6e79fcde31c6123; b629596072e5fa901c84f9e88d845a696ee32942 up to, but not including, 7226ddf3311c5e5a7726ad7d4e7b079bb3cfbb29; and 2 more ranges604c506ca43fce52bb882cff9c1fdf2ec3b4029c, e280ab978c81443103d7c61bdd1d8d708cf6ed6d, 04bc4d1090c343025d69149ca669a27c5b9c34a7, ced9c4e2289a786b8fa684d8893b7045ea53ef7e, 98b8a6bfd30d07a19cfacdf82b50f84bf3360869, 4e8c8b37ee84b3b19c448d2b8e4c916d2f5b9c86
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystembefore V1.1.1V1.1.1
LinuxLinux Kernel4.16 up to, but not including, 4.19.316; 4.20 up to, but not including, 5.4.278; 5.5 up to, but not including, 5.10.219; 5.11 up to, but not including, 5.15.161; 5.16 up to, but not including, 6.1.93; 6.2 up to, but not including, 6.6.33; 6.7 up to, but not including, 6.8.12; 6.9 up to, but not including, 6.9.34.19.316, 5.4.278, 5.10.219, 5.15.161, 6.1.93, 6.6.33

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.

Scoring systemScoreSeverityScored by
CVSS 3.17.3HighCNA
CVSS 3.17.8HighNVD

Official description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix potential index out of bounds in color transformation function Fixes index out of bounds issue in the color transformation function. The issue could occur when the index 'i' exceeds the number of transfer function points (TRANSFER_FUNC_POINTS). The fix adds a check to ensure 'i' is within bounds before accessing the transfer function points. If 'i' is out of bounds, an error message is logged and the function returns false to indicate an error. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:405 cm_helper_translate_curve_to_hw_format() error: buffer overflow 'output_tf->tf_pts.red' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:406 cm_helper_translate_curve_to_hw_format() error: buffer overflow 'output_tf->tf_pts.green' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:407 cm_helper_translate_curve_to_hw_format() error: buffer overflow 'output_tf->tf_pts.blue' 1025 <= s32max

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Validation of Array Index

The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

How developers prevent this class of flaw

  • Use an input validation framework such as Struts or the OWASP ESAPI Validation API. Note that using a framework does not automatically address all input validation problems; be mindful of weaknesses that could arise from misusing the framework itself (CWE-1173).
  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, Ada allows the programmer to constrain the values of a variable and languages such as Java and Ruby will allow the programmer to handle exceptions when an out-of-bounds index is accessed.
  • Use a CPU and operating system that offers Data Execution Protection (using hardware NX or XD bits) or the equivalent techniques that simulate this feature in software, such as PaX. These techniques ensure that any instruction executed is exclusively at a memory address that is part of the code segment. For more information on these techniques see D3-PSEP (Process Segment Execution Prevention) from D3FEND.

More Improper Validation of Array Index vulnerabilities (CWE-129)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Improper Validation of Array Index vulnerabilities

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