Cyber Resilience

CVE-2023-24502

Crypto Weakness in Electra-Air Central Ac Unit Firmware v4 … v8

Crypto Weakness
Published
17 April 2023
Modified
06 February 2025
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0017 7th percentile
Risk Priority 53 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-24502 is a high-severity Inadequate Encryption Strength (CWE-326) vulnerability in Electra-Air Central Ac Unit Firmware. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Brute Force (T1110); ranked at the 7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A04:2025 Cryptographic FailuresA07:2025 Authentication Failures

EU & UK References

Vulnerability Data

Electra Central AC unit – The unit opens an AP with an easily calculated password.

CWE(s)
CWE-326CWE-521

Related Threats

MITRE ATT&CK Enterprise Techniques

T1110 Brute Force Credential Access
Adversaries may use brute force techniques to gain access to accounts when passwords are unknown or when password hashes are obtained.
attack.mitre.org →
T1110.001 Password Guessing Credential Access
Adversaries with no prior knowledge of legitimate credentials within the system or environment may guess passwords to attempt access to accounts.
attack.mitre.org →
T1110.002 Password Cracking Credential Access
Adversaries may use password cracking to attempt to recover usable credentials, such as plaintext passwords, when credential material such as password hashes are obtained.
attack.mitre.org →
T1110.003 Password Spraying Credential Access
Adversaries may use a single or small list of commonly used passwords against many different accounts to attempt to acquire valid account credentials.
attack.mitre.org →
T1133 External Remote Services Persistence
Adversaries may leverage external-facing remote services to initially access and/or persist within a network.
attack.mitre.org →
T1558.003 Kerberoasting Credential Access
Adversaries may abuse a valid Kerberos ticket-granting ticket (TGT) or sniff network traffic to obtain a ticket-granting service (TGS) ticket that may be vulnerable to [Brute Force](https://attack.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-24501Same product: Electra-Air Central Ac Unit
CVE-2023-24504Same product: Electra-Air Central Ac Unit
CVE-2023-24500Same product: Electra-Air Central Ac Unit
CVE-2023-24503Same vendor: Electra-Air
CVE-2025-26847Shared CWE-521
CVE-2024-40697Shared CWE-521
CVE-2025-12552Shared CWE-521
CVE-2025-11322Shared CWE-521
CVE-2024-51398Shared CWE-521
CVE-2023-31098Shared CWE-521

Affected Assets

electra-air
central ac unit firmware
v4, v5, v7, v8

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 14 hardening rules · 7 OS baselines
Validate
Prove the fix (OWASP ASVS)
  • V11.4.2
  • V14.1.2
  • V14.2.4
  • V6.2.4

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

PM-15 Security and Privacy Groups and Associations
addresses: CWE-326 CWE-521

Maintaining currency with technologies and practices reduces selection of encryption mechanisms that provide inadequate strength.

CM-6 Configuration Settings
addresses: CWE-521

Configuration settings can define and enforce strong password requirements to avoid weak policies.

IA-1 Policy and Procedures
addresses: CWE-521

IA policy establishes password requirements, directly addressing weak password requirements.

IA-5 Authenticator Management
addresses: CWE-521

Ensuring authenticators have sufficient strength of mechanism for intended use addresses weak password requirements.

PL-9 Central Management
addresses: CWE-521

Organization-wide password and authentication policies are applied uniformly, preventing weak local password requirements.

PM-3 Information Security and Privacy Resources
addresses: CWE-521

Dedicated security resources support deployment of strong authentication systems and enforcement of robust password policies.

RA-4 Risk Assessment Update
addresses: CWE-326

Updated assessments identify when previously adequate encryption strength no longer meets current attack capabilities or compliance drivers.

RA-5 Vulnerability Monitoring and Scanning
addresses: CWE-521

Vulnerability scans assess password policies and weak credential requirements against benchmarks.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-03 full match
prevents

Explicitly requires enforcing minimum password strength as part of authentication.

PR.DS-01 mostly match
prevents

Strong encryption is required to protect confidentiality of data-at-rest.

PR.DS-02 mostly match
prevents

Strong encryption is required to protect confidentiality of data-in-transit.

PR.PS-01 partial match
prevents

Hardened baselines can enforce minimum cryptographic algorithm and key-length settings.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.17 Authentication information mostly match
prevents

Enforcing minimum length, complexity, non-dictionary, and non-reuse rules directly counters weak password policies that allow attackers to guess or brute-force credentials.

A.8.24 Use of cryptography partial match
prevents

Requiring the organization to define and enforce minimum cryptographic strength prevents deployment of insufficient key lengths or weak ciphers that can be brute-forced.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).

Oracle Linux 9 (1 rule)
  • V-271756 OL 9 local disk partitions must implement cryptographic mechanisms to prevent unauthorized disclosure or modification of all information that requires at rest protection. prevents CWE-326
RHEL 7 (2 rules)
  • V-204424 The Red Hat Enterprise Linux operating system must not allow accounts configured with blank or null passwords. prevents CWE-521
  • V-204425 The Red Hat Enterprise Linux operating system must be configured so that the SSH daemon does not allow authentication using an empty password. prevents CWE-521
RHEL 8 (1 rule)
  • V-230224 All RHEL 8 local disk partitions must implement cryptographic mechanisms to prevent unauthorized disclosure or modification of all information that requires at rest protection. prevents CWE-326
RHEL 9 (1 rule)
  • V-257879 RHEL 9 local disk partitions must implement cryptographic mechanisms to prevent unauthorized disclosure or modification of all information that requires at rest protection. prevents CWE-326
Windows Server 2016 (1 rule)
  • V-224843 Systems requiring data at rest protections must employ cryptographic mechanisms to prevent unauthorized disclosure and modification of the information at rest. prevents CWE-326

References