CyberSecBulletin
CVE-2023-29057NVD status: Modified

XClarity Controller: Incorrect Default Permissions

Published Updated By the CyberSecBulletin desk

CVE-2023-29057 is a high-severity incorrect default permissions vulnerability in XClarity Controller from Lenovo, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected XClarity Controller versions: Refer to Mitigation strategy section in LEN-118321. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.5% 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 Thinkagile Hx5530 Firmware to 2.93_afbt30p or a later version.
  2. Update Thinkagile Hx7530 Firmware to 2.93_afbt30p or a later version.
  3. Update Thinkagile Vx3331 Firmware to 2.93_afbt30p or a later version.
  4. Read the advisory on support.lenovo.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
LenovoXClarity ControllerRefer to Mitigation strategy section in LEN-118321Not stated
LenovoThinkagile Hx5530 Firmwarebefore 2.93_afbt30p2.93_afbt30p
LenovoThinkagile Hx7530 Firmwarebefore 2.93_afbt30p2.93_afbt30p
LenovoThinkagile Vx3331 Firmwarebefore 2.93_afbt30p2.93_afbt30p
LenovoThinkagile Hx Enclosure Firmwarebefore 3.72_tei388s3.72_tei388s
LenovoThinkagile Hx1021 Firmwarebefore 3.72_tei388s3.72_tei388s
LenovoThinkagile Hx1320 Firmwarebefore 8.88_cdi3a4a8.88_cdi3a4a
LenovoThinkagile Hx1321 Firmwarebefore 8.88_cdi3a4a8.88_cdi3a4a
LenovoThinkagile Hx1331 Firmwarebefore 2.93_afbt30p2.93_afbt30p
LenovoThinkagile Hx1520-r Firmwarebefore 8.88_cdi3a4a8.88_cdi3a4a
LenovoThinkagile Hx1521-r Firmwarebefore 8.88_cdi3a4a8.88_cdi3a4a
LenovoThinkagile Hx2320-e Firmwarebefore 8.88_cdi3a4a8.88_cdi3a4a
LenovoThinkagile Hx2321 Firmwarebefore 8.88_cdi3a4a8.88_cdi3a4a
LenovoThinkagile Hx2330 Firmwarebefore 2.93_afbt30p; 2.93_afbt30p2.93_afbt30p
LenovoThinkagile Hx2331 Firmwarebefore 2.93_afbt30p2.93_afbt30p
LenovoThinkagile Hx2720-e Firmwarebefore 3.72_tei388s3.72_tei388s
LenovoThinkagile Hx3320 Firmwarebefore 8.88_cdi3a4a8.88_cdi3a4a
LenovoThinkagile Hx3321 Firmwarebefore 8.88_cdi3a4a8.88_cdi3a4a
LenovoThinkagile Hx3330 Firmwarebefore 2.93_afbt30p2.93_afbt30p
LenovoThinkagile Hx3331 Firmwarebefore 2.93_afbt30p; before 4.71_d8bt48p2.93_afbt30p, 4.71_d8bt48p
LenovoThinkagile Hx3375 Firmwarebefore 4.71_d8bt48p4.71_d8bt48p
LenovoThinkagile Hx3376 Firmwarebefore 8.88_cdi3a4a8.88_cdi3a4a
LenovoThinkagile Hx3520-g Firmwarebefore 8.88_cdi3a4a8.88_cdi3a4a
LenovoThinkagile Hx3521-g Firmwarebefore 3.72_tei388s3.72_tei388s
LenovoThinkagile Hx3720 Firmwarebefore 3.72_tei388s3.72_tei388s

Version data comes from the organisation that assigned the CVE; 35 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.3HighCNA (lenovo.com)
CVSS 3.18.8HighNVD

Official description

A valid XCC user's local account permissions overrides their active directory permissions under specific configurations. This could lead to a privilege escalation. To be vulnerable, LDAP must be configured for authentication/authorization and logins configured as “Local First, then LDAP”.

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

The underlying weakness: Incorrect Default Permissions

During installation, installed file permissions are set to allow anyone to modify those files.

How developers prevent this class of flaw

  • The architecture needs to access and modification attributes for files to only those users who actually require those actions.
  • Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

More Incorrect Default Permissions vulnerabilities (CWE-276)

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 XClarity Controller

All XClarity Controller vulnerabilities

Recent Incorrect Default Permissions vulnerabilities

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