CyberSecBulletin
CVE-2024-47723NVD status: Modified

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2024-47723 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 d1017d2a0f3f16dc1db5120e7ddbe7c6680425b0, 5ad6284c8d433f8a213111c5c44ead4d9705b622, 0338e66cba272351ca9d7d03f3628e390e70963b 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 0.29% 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 d1017d2a0f3f16dc1db5120e7ddbe7c6680425b0 or 5ad6284c8d433f8a213111c5c44ead4d9705b622 or 0338e66cba272351ca9d7d03f3628e390e70963b or ead82533278502428883085a787d5a00f15e5eb9, 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 5.10.227 or 5.15.168 or 6.1.113 or 6.6.54, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, d1017d2a0f3f16dc1db5120e7ddbe7c6680425b0; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 5ad6284c8d433f8a213111c5c44ead4d9705b622; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 0338e66cba272351ca9d7d03f3628e390e70963b; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, ead82533278502428883085a787d5a00f15e5eb9; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 6ce8b6ab44a8b5918c0ee373d4ad19d19017931b; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, c1ba4b8ca799ff1d99d01f37d7ccb7d5ba5533d2; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 128d5cfdcf844cb690c9295a3a1c1114c21fc15a; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 96855f40e152989c9e7c20c4691ace5581098acc; and 2 more rangesd1017d2a0f3f16dc1db5120e7ddbe7c6680425b0, 5ad6284c8d433f8a213111c5c44ead4d9705b622, 0338e66cba272351ca9d7d03f3628e390e70963b, ead82533278502428883085a787d5a00f15e5eb9, 6ce8b6ab44a8b5918c0ee373d4ad19d19017931b, c1ba4b8ca799ff1d99d01f37d7ccb7d5ba5533d2
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystembefore V1.1.1V1.1.1
LinuxLinux Kernel2.6.12 up to, but not including, 5.10.227; 5.11 up to, but not including, 5.15.168; 5.16 up to, but not including, 6.1.113; 6.2 up to, but not including, 6.6.54; 6.7 up to, but not including, 6.10.13; 6.11 up to, but not including, 6.11.25.10.227, 5.15.168, 6.1.113, 6.6.54, 6.10.13, 6.11.2

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.

Scoring systemScoreSeverityScored by
CVSS 3.17.8HighCNA
CVSS 3.17.1HighNVD

Official description

In the Linux kernel, the following vulnerability has been resolved: jfs: fix out-of-bounds in dbNextAG() and diAlloc() In dbNextAG() , there is no check for the case where bmp->db_numag is greater or same than MAXAG due to a polluted image, which causes an out-of-bounds. Therefore, a bounds check should be added in dbMount(). And in dbNextAG(), a check for the case where agpref is greater than bmp->db_numag should be added, so an out-of-bounds exception should be prevented. Additionally, a check for the case where agno is greater or same than MAXAG should be added in diAlloc() to prevent out-of-bounds.

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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