CyberSecBulletin
CVE-2024-38560NVD status: Modified

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2024-38560 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 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 481fc0c8617304a67649027c4a44723a139a0462, 595a6b98deec01b6dbb20139f71edcd5fb760ec2, 00b425ff0891283207d7bad607a2412225274d7a 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 0.27% 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 481fc0c8617304a67649027c4a44723a139a0462 or 595a6b98deec01b6dbb20139f71edcd5fb760ec2 or 00b425ff0891283207d7bad607a2412225274d7a or 1708e3cf2488788cba5489e4f913d227de757baf, 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
LinuxLinux9f30b674759b9a2da25aefe25d885161d8a911cb up to, but not including, 481fc0c8617304a67649027c4a44723a139a0462; 9f30b674759b9a2da25aefe25d885161d8a911cb up to, but not including, 595a6b98deec01b6dbb20139f71edcd5fb760ec2; 9f30b674759b9a2da25aefe25d885161d8a911cb up to, but not including, 00b425ff0891283207d7bad607a2412225274d7a; 9f30b674759b9a2da25aefe25d885161d8a911cb up to, but not including, 1708e3cf2488788cba5489e4f913d227de757baf; 9f30b674759b9a2da25aefe25d885161d8a911cb up to, but not including, 7d3e694c4fe30f3aba9cd5ae86fb947a54c3db5c; 9f30b674759b9a2da25aefe25d885161d8a911cb up to, but not including, 204714e68015d6946279719fd464ecaf57240f35; 9f30b674759b9a2da25aefe25d885161d8a911cb up to, but not including, 7510fab46b1cbd1680e2a096e779aec3334b4143; 9f30b674759b9a2da25aefe25d885161d8a911cb up to, but not including, ecb76200f5557a2886888aaa53702da1ab9e6cdf; and 2 more ranges481fc0c8617304a67649027c4a44723a139a0462, 595a6b98deec01b6dbb20139f71edcd5fb760ec2, 00b425ff0891283207d7bad607a2412225274d7a, 1708e3cf2488788cba5489e4f913d227de757baf, 7d3e694c4fe30f3aba9cd5ae86fb947a54c3db5c, 204714e68015d6946279719fd464ecaf57240f35
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystembefore V1.1.1V1.1.1
LinuxLinux Kernel3.19 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
NoneNothing can be modified.
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:N/A:H. Scored by NVD.

Official description

In the Linux kernel, the following vulnerability has been resolved: scsi: bfa: Ensure the copied buf is NUL terminated Currently, we allocate a nbytes-sized kernel buffer and copy nbytes from userspace to that buffer. Later, we use sscanf on this buffer but we don't ensure that the string is terminated inside the buffer, this can lead to OOB read when using sscanf. Fix this issue by using memdup_user_nul instead of memdup_user.

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

The underlying weakness: Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

How developers prevent this class of flaw

  • Use a language that provides appropriate memory abstractions.

More Out-of-bounds Read vulnerabilities (CWE-125)

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 Out-of-bounds Read vulnerabilities

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