CWE-340
Generation of Predictable Numbers or Identifiers
The product uses a scheme that generates numbers or identifiers that are more predictable than required.
CVE-2025-3449 (GCVE-0-2025-3449)
Vulnerability from cvelistv5
Published
2025-10-07 18:21
Modified
2025-10-08 13:15
Severity ?
2.3 (Low) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
4.2 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
4.2 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
VLAI Severity ?
EPSS score ?
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Summary
A Generation of Predictable Numbers or Identifiers vulnerability in the SDM component of B&R Automation Runtime versions before 6.4 may allow an unauthenticated network-based attacker to take over already established sessions.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| B&R Industrial Automation GmbH | Automation Runtime |
Version: 6.0 < 6.4 Version: 4 < |
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CVE-2025-40918 (GCVE-0-2025-40918)
Vulnerability from cvelistv5
Published
2025-07-16 14:00
Modified
2025-08-07 09:08
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely.
The cnonce (client nonce) is generated from an MD5 hash of the PID, the epoch time and the built-in rand function. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
According to RFC 2831, The cnonce-value is an opaque quoted string value provided by the client and used by both client and server to avoid chosen plaintext attacks, and to provide mutual authentication. The security of the implementation
depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| EHUELS | Authen::SASL::Perl::DIGEST_MD5 |
Version: 2.04 < |
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CVE-2025-40919 (GCVE-0-2025-40919)
Vulnerability from cvelistv5
Published
2025-07-16 14:04
Modified
2025-07-16 20:49
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
Authen::DigestMD5 versions 0.01 through 0.02 for Perl generate the cnonce insecurely.
The cnonce (client nonce) is generated from an MD5 hash of the PID, the epoch time and the built-in rand function. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
According to RFC 2831, "The cnonce-value is an opaque quoted string value provided by the client and used by both client and server to avoid chosen plaintext attacks, and to provide mutual authentication. The security of the implementation depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy."
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| SALVA | Authen::DigestMD5 |
Version: 0.01 < |
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CVE-2025-40920 (GCVE-0-2025-40920)
Vulnerability from cvelistv5
Published
2025-08-11 20:19
Modified
2025-08-28 11:49
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
Catalyst::Authentication::Credential::HTTP versions 1.018 and earlier for Perl generate nonces using the Perl Data::UUID library.
* Data::UUID does not use a strong cryptographic source for generating UUIDs.
* Data::UUID returns v3 UUIDs, which are generated from known information and are unsuitable for security, as per RFC 9562.
* The nonces should be generated from a strong cryptographic source, as per RFC 7616.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| ETHER | Catalyst::Authentication::Credential::HTTP |
Version: 0.06 < |
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CVE-2025-40923 (GCVE-0-2025-40923)
Vulnerability from cvelistv5
Published
2025-07-16 13:05
Modified
2025-07-16 20:48
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely.
The default session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
Predicable session ids could allow an attacker to gain access to systems.
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| MIYAGAWA | Plack::Middleware::Session |
Version: 0.01 < 0.35 |
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CVE-2025-40924 (GCVE-0-2025-40924)
Vulnerability from cvelistv5
Published
2025-07-17 13:33
Modified
2025-07-17 19:53
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely.
The session id is generated from a (usually SHA-1) hash of a simple counter, the epoch time, the built-in rand function, the PID and the current Catalyst context. This information is of low entropy. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
Predicable session ids could allow an attacker to gain access to systems.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| HAARG | Catalyst::Plugin::Session |
Version: 0.01 < 0.44 |
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CVE-2025-40925 (GCVE-0-2025-40925)
Vulnerability from cvelistv5
Published
2025-09-20 12:31
Modified
2025-09-22 17:27
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
Starch versions 0.14 and earlier generate session ids insecurely.
The default session id generator returns a SHA-1 hash seeded with a counter, the epoch time, the built-in rand function, the PID, and internal Perl reference addresses. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
Predicable session ids could allow an attacker to gain access to systems.
References
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CVE-2025-40933 (GCVE-0-2025-40933)
Vulnerability from cvelistv5
Published
2025-09-17 14:25
Modified
2025-09-17 17:21
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
Apache::AuthAny::Cookie v0.201 or earlier for Perl generates session ids insecurely.
Session ids are generated using an MD5 hash of the epoch time and a call to the built-in rand function. The epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
Predicable session ids could allow an attacker to gain access to systems.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| KGOLDOV | Apache::AuthAny |
Version: 0.19 < |
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CVE-2025-58424 (GCVE-0-2025-58424)
Vulnerability from cvelistv5
Published
2025-10-15 13:55
Modified
2025-10-16 03:56
Severity ?
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
6.3 (Medium) - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
6.3 (Medium) - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
VLAI Severity ?
EPSS score ?
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Summary
On BIG-IP systems, undisclosed traffic can cause data corruption and unauthorized data modification in protocols which do not have message integrity protection. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
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CVE-2025-59452 (GCVE-0-2025-59452)
Vulnerability from cvelistv5
Published
2025-10-06 00:00
Modified
2025-10-06 20:16
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Summary
The YoSmart YoLink API through 2025-10-02 uses an endpoint URL that is derived from a device's MAC address along with an MD5 hash of non-secret information, such as a key that begins with cf50.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| YoSmart | YoLink API |
Version: 0 < |
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.