CWE-645
Overly Restrictive Account Lockout Mechanism
The product contains an account lockout protection mechanism, but the mechanism is too restrictive and can be triggered too easily, which allows attackers to deny service to legitimate users by causing their accounts to be locked out.
CVE-2023-4346 (GCVE-0-2023-4346)
Vulnerability from cvelistv5
Published
2023-08-29 19:38
Modified
2024-10-01 20:32
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-645 - Overly Restrictive Account Lockout Mechanism
Summary
KNX devices that use KNX Connection Authorization and support Option 1 are, depending on the implementation, vulnerable to being locked and users being unable to reset them to gain access to the device. The BCU key feature on the devices can be used to create a password for the device, but this password can often not be reset without entering the current password. If the device is configured to interface with a network, an attacker with access to that network could interface with the KNX installation, purge all devices without additional security options enabled, and set a BCU key, locking the device. Even if a device is not connected to a network, an attacker with physical access to the device could also exploit this vulnerability in the same way.
References
| ► | URL | Tags | |||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| KNX Association | KNX Protocol Connection Authorization Option 1 |
Version: 0 |
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CVE-2024-1722 (GCVE-0-2024-1722)
Vulnerability from cvelistv5
Published
2024-02-27 17:39
Modified
2025-08-07 11:19
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-645 - Overly Restrictive Account Lockout Mechanism
Summary
A flaw was found in Keycloak. In certain conditions, this issue may allow a remote unauthenticated attacker to block other accounts from logging in.
References
| ► | URL | Tags | ||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ► |
Version: 4.15.0 |
|||||||||||||
|
||||||||||||||
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CVE-2024-37028 (GCVE-0-2024-37028)
Vulnerability from cvelistv5
Published
2024-08-14 14:32
Modified
2024-08-16 17:26
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
6.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
6.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
VLAI Severity ?
EPSS score ?
CWE
- CWE-645 - Overly Restrictive Account Lockout Mechanism
Summary
BIG-IP Next Central Manager may allow an attacker to lock out an account that has never been logged in. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
References
| ► | URL | Tags | |||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| F5 | BIG-IP Next Central Manager |
Version: 20.1.0 < 20.2.1 |
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CVE-2025-31947 (GCVE-0-2025-31947)
Vulnerability from cvelistv5
Published
2025-05-15 10:41
Modified
2025-05-15 13:46
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-645 - Overly Restrictive Account Lockout Mechanism
Summary
Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to lockout LDAP users following repeated login failures, which allows attackers to lock external LDAP accounts through repeated login failures through Mattermost.
References
| ► | URL | Tags |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Mattermost | Mattermost |
Version: 10.6.0 ≤ 10.6.1 Version: 10.5.0 ≤ 10.5.2 Version: 10.4.0 ≤ 10.4.4 Version: 9.11.0 ≤ 9.11.11 |
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CVE-2025-5241 (GCVE-0-2025-5241)
Vulnerability from cvelistv5
Published
2025-07-11 00:16
Modified
2025-07-11 13:34
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-645 - Overly Restrictive Account Lockout Mechanism
Summary
Overly Restrictive Account Lockout Mechanism vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series allows a remote unauthenticated attacker to lockout legitimate users for a certain period by repeatedly attempting to login with incorrect passwords. The legitimate users will be unable to login until a certain period has passed after the lockout or until the product is reset.
References
| ► | URL | Tags | ||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
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"value": "GENERAL"
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],
"problemTypes": [
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"descriptions": [
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"cweId": "CWE-645",
"description": "CWE-645 Overly Restrictive Account Lockout Mechanism",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-07-11T00:16:43.275Z",
"orgId": "e0f77b61-78fd-4786-b3fb-1ee347a748ad",
"shortName": "Mitsubishi"
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"references": [
{
"tags": [
"vendor-advisory"
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"url": "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-005_en.pdf"
},
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-25-184-04"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Denial-of-Service Vulnerability in MELSEC iQ-F Series",
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"cveMetadata": {
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"cveId": "CVE-2025-5241",
"datePublished": "2025-07-11T00:16:43.275Z",
"dateReserved": "2025-05-27T03:34:31.761Z",
"dateUpdated": "2025-07-11T13:34:05.817Z",
"state": "PUBLISHED"
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Mitigation
Phase: Architecture and Design
Description:
- Implement more intelligent password throttling mechanisms such as those which take IP address into account, in addition to the login name.
Mitigation
Phase: Architecture and Design
Description:
- Implement a lockout timeout that grows as the number of incorrect login attempts goes up, eventually resulting in a complete lockout.
Mitigation
Phase: Architecture and Design
Description:
- Consider alternatives to account lockout that would still be effective against password brute force attacks, such as presenting the user machine with a puzzle to solve (makes it do some computation).
CAPEC-2: Inducing Account Lockout
An attacker leverages the security functionality of the system aimed at thwarting potential attacks to launch a denial of service attack against a legitimate system user. Many systems, for instance, implement a password throttling mechanism that locks an account after a certain number of incorrect log in attempts. An attacker can leverage this throttling mechanism to lock a legitimate user out of their own account. The weakness that is being leveraged by an attacker is the very security feature that has been put in place to counteract attacks.