CyberSecBulletin
CVE-2023-41743NVD status: Modified

Acronis Cyber Protect Home Office: Improper Privilege Management

Published Updated By the CyberSecBulletin desk

CVE-2023-41743 is a high-severity improper privilege management vulnerability in Acronis Cyber Protect Home Office from Acronis, 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 version 40278 as the first without the flaw, so updating Acronis Cyber Protect Home Office to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.37% 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 Acronis Cyber Protect Home Office to 40278 or a later version.
  2. Update Acronis Cyber Protect Cloud Agent to 31637 or a later version.
  3. Update Acronis Cyber Protect 15 to 35979 or a later version.
  4. Read the advisory on security-advisory.acronis.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
AcronisAcronis Cyber Protect Home Officebefore 4027840278
AcronisAcronis Cyber Protect Cloud Agentbefore 3163731637
AcronisAcronis Cyber Protect 15before 3597935979
AcronisAcronis True Image OEMbefore 4257542575
Acroniscyber_protectbefore 3597935979
Acroniscyber_protect_home_officebefore 4027840278
Acronisagentbefore 3163731637

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 3.17.8HighNVD
CVSS 3.08.8HighCNA (acronis.com)

Official description

Local privilege escalation due to insecure driver communication port permissions. The following products are affected: Acronis Cyber Protect Home Office (Windows) before build 40278, Acronis Cyber Protect Cloud Agent (Windows) before build 31637, Acronis Cyber Protect 15 (Windows) before build 35979, Acronis True Image OEM (Windows) before build 42575.

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

The underlying weakness: Improper Privilege Management

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

How developers prevent this class of flaw

  • Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Consider following the principle of separation of privilege. Require multiple conditions to be met before permitting access to a system resource.

More Improper Privilege Management vulnerabilities (CWE-269)

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

Other vulnerabilities in Acronis Cyber Protect Home Office

All Acronis Cyber Protect Home Office vulnerabilities

Recent Improper Privilege Management vulnerabilities

Spotted an error? Tell us.