CyberSecBulletin
CVE-2024-34027NVD status: Modified

Linux: Allocation of Resources Without Limits or Throttling

Published Updated By the CyberSecBulletin desk

CVE-2024-34027 is a high-severity allocation of resources without limits or throttling 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 a6e1f7744e9b84f86a629a76024bba8468aa153b, b5bac43875aa27ec032dbbb86173baae6dce6182, 5d47d63883735718825ca2efc4fca6915469774f 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 0.24% 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 a6e1f7744e9b84f86a629a76024bba8468aa153b or b5bac43875aa27ec032dbbb86173baae6dce6182 or 5d47d63883735718825ca2efc4fca6915469774f or 329edb7c9e3b6ca27e6ca67ab1cdda1740fb3a2b, whichever matches your release line, or a later version.
  2. Update linux_kernel to a6e1f7744e9b or b5bac43875aa or 5d47d6388373 or 329edb7c9e3b, whichever matches your release line, or a later version.
  3. Update SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to V1.1.1 or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxef8d563f184e1112651f2cbde383d43e599334e8 up to, but not including, a6e1f7744e9b84f86a629a76024bba8468aa153b; ef8d563f184e1112651f2cbde383d43e599334e8 up to, but not including, b5bac43875aa27ec032dbbb86173baae6dce6182; ef8d563f184e1112651f2cbde383d43e599334e8 up to, but not including, 5d47d63883735718825ca2efc4fca6915469774f; ef8d563f184e1112651f2cbde383d43e599334e8 up to, but not including, 329edb7c9e3b6ca27e6ca67ab1cdda1740fb3a2b; ef8d563f184e1112651f2cbde383d43e599334e8 up to, but not including, 69136304fd144144a4828c7b7b149d0f80321ba4; ef8d563f184e1112651f2cbde383d43e599334e8 up to, but not including, 0a4ed2d97cb6d044196cc3e726b6699222b41019; 5.8a6e1f7744e9b84f86a629a76024bba8468aa153b, b5bac43875aa27ec032dbbb86173baae6dce6182, 5d47d63883735718825ca2efc4fca6915469774f, 329edb7c9e3b6ca27e6ca67ab1cdda1740fb3a2b, 69136304fd144144a4828c7b7b149d0f80321ba4, 0a4ed2d97cb6d044196cc3e726b6699222b41019
Linuxlinux_kernelc75488fb4d82 up to, but not including, a6e1f7744e9b; c75488fb4d82 up to, but not including, b5bac43875aa; c75488fb4d82 up to, but not including, 5d47d6388373; c75488fb4d82 up to, but not including, 329edb7c9e3b; c75488fb4d82 up to, but not including, 69136304fd14; c75488fb4d82 up to, but not including, 0a4ed2d97cb6; 5.8; before 5.8; and 6 more rangesa6e1f7744e9b, b5bac43875aa, 5d47d6388373, 329edb7c9e3b, 69136304fd14, 0a4ed2d97cb6
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystembefore V1.1.1V1.1.1

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 CNA.

Scoring systemScoreSeverityScored by
CVSS 3.17.8HighCNA
CVSS 3.17.0HighCISA (ADP)

Official description

In the Linux kernel, the following vulnerability has been resolved: f2fs: compress: fix to cover {reserve,release}_compress_blocks() w/ cp_rwsem lock It needs to cover {reserve,release}_compress_blocks() w/ cp_rwsem lock to avoid racing with checkpoint, otherwise, filesystem metadata including blkaddr in dnode, inode fields and .total_valid_block_count may be corrupted after SPO case.

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

The underlying weakness: Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How developers prevent this class of flaw

  • Clearly specify the minimum and maximum expectations for capabilities, and dictate which behaviors are acceptable when resource allocation reaches limits.
  • Limit the amount of resources that are accessible to unprivileged users. Set per-user limits for resources. Allow the system administrator to define these limits. Be careful to avoid CWE-410.
  • For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.

More Allocation of Resources Without Limits or Throttling vulnerabilities (CWE-770)

Timeline

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

References

Recent Allocation of Resources Without Limits or Throttling vulnerabilities

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