Common Weakness Enumeration
CWE-331
AllowedInsufficient Entropy
Abstraction: Base · Status: Draft
The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.
221 vulnerabilities reference this CWE, most recent first.
CVE-2021-4241 (GCVE-0-2021-4241)
Vulnerability from cvelistv5 – Published: 2022-11-15 00:00 – Updated: 2025-04-15 13:13
VLAI
EPSS
VEX
Title
phpservermon User.php setUserLoggedIn predictable algorithm in random number generator
Summary
A vulnerability, which was classified as problematic, was found in phpservermon. Affected is the function setUserLoggedIn of the file src/psm/Service/User.php. The manipulation leads to use of predictable algorithm in random number generator. The exploit has been disclosed to the public and may be used. The name of the patch is bb10a5f3c68527c58073258cb12446782d223bc3. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-213744.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-14 16:57 UTC
CWE
- CWE-331 - Insufficient Entropy -> CWE-338 Cryptographically Weak PRNG -> CWE-1241 Use of Predictable Algorithm in Random Number Generator
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| unspecified | phpservermon |
Affected:
n/a
|
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CVE-2021-4240 (GCVE-0-2021-4240)
Vulnerability from cvelistv5 – Published: 2022-11-15 00:00 – Updated: 2025-04-15 13:14
VLAI
EPSS
VEX
Title
phpservermon User.php generatePasswordResetToken predictable algorithm in random number generator
Summary
A vulnerability, which was classified as problematic, was found in phpservermon. This affects the function generatePasswordResetToken of the file src/psm/Service/User.php. The manipulation leads to use of predictable algorithm in random number generator. The exploit has been disclosed to the public and may be used. The name of the patch is 3daa804d5f56c55b3ae13bfac368bb84ec632193. It is recommended to apply a patch to fix this issue. The identifier VDB-213717 was assigned to this vulnerability.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-14 16:57 UTC
CWE
- CWE-331 - Insufficient Entropy -> CWE-338 Cryptographically Weak PRNG -> CWE-1241 Use of Predictable Algorithm in Random Number Generator
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| unspecified | phpservermon |
Affected:
n/a
|
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CVE-2021-3505 (GCVE-0-2021-3505)
Vulnerability from cvelistv5 – Published: 2021-04-19 20:22 – Updated: 2024-08-03 16:53
VLAI
EPSS
VEX
Summary
A flaw was found in libtpms in versions before 0.8.0. The TPM 2 implementation returns 2048 bit keys with ~1984 bit strength due to a bug in the TCG specification. The bug is in the key creation algorithm in RsaAdjustPrimeCandidate(), which is called before the prime number check. The highest threat from this vulnerability is to data confidentiality.
Severity
No CVSS data available.
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1950046 | x_refsource_MISC |
| https://github.com/stefanberger/libtpms/issues/183 | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
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CVE-2020-36925 (GCVE-0-2020-36925)
Vulnerability from cvelistv5 – Published: 2026-01-06 15:52 – Updated: 2026-01-06 16:51
VLAI
EPSS
VEX
Title
Arteco Web Client DVR/NVR Session ID Brute Force Authentication Bypass
Summary
Arteco Web Client DVR/NVR contains a session hijacking vulnerability with insufficient session ID complexity that allows remote attackers to bypass authentication. Attackers can brute force session IDs within a specific numeric range to obtain valid sessions and access live camera streams without authorization.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-06 16:51 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/49348 | exploit |
| https://www.arteco-global.com | product |
| https://www.zeroscience.mk/en/vulnerabilities/ZSL… | third-party-advisory |
| https://packetstorm.news/files/id/160718 | exploit |
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entry |
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entry |
| https://cxsecurity.com/issue/WLB-2020120170 | exploit |
| https://www.vulncheck.com/advisories/arteco-web-c… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Arteco-Global | Arteco Web Client DVR/NVR |
Affected:
Unknown
|
Date Public
2020-11-16 00:00
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CVE-2020-29508 (GCVE-0-2020-29508)
Vulnerability from cvelistv5 – Published: 2022-07-11 19:25 – Updated: 2024-09-16 16:13
VLAI
EPSS
VEX
Summary
Dell BSAFE Crypto-C Micro Edition, versions before 4.1.5, and Dell BSAFE Micro Edition Suite, versions before 4.6, contain an Improper Input Validation Vulnerability.
Severity
5.3 (Medium)
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00018111… | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | Dell BSAFE Micro Edition Suite |
Affected:
unspecified , < 4.1.5 / 4.6
(custom)
|
Date Public
2020-07-06 00:00
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CVE-2020-29505 (GCVE-0-2020-29505)
Vulnerability from cvelistv5 – Published: 2022-07-11 19:25 – Updated: 2024-09-16 22:09
VLAI
EPSS
VEX
Summary
Dell BSAFE Crypto-C Micro Edition, versions before 4.1.5, and Dell BSAFE Micro Edition Suite, versions before 4.5.2, contain a Key Management Error Vulnerability.
Severity
7.1 (High)
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00018111… | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | Dell BSAFE Crypto-C Micro Edition |
Affected:
unspecified , < 4.1.5 and 4.6
(custom)
|
Date Public
2022-07-06 00:00
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CVE-2020-1773 (GCVE-0-2020-1773)
Vulnerability from cvelistv5 – Published: 2020-03-27 12:47 – Updated: 2024-09-16 23:27
VLAI
EPSS
VEX
Title
Session / Password / Password token leak
Summary
An attacker with the ability to generate session IDs or password reset tokens, either by being able to authenticate or by exploiting OSA-2020-09, may be able to predict other users session IDs, password reset tokens and automatically generated passwords. This issue affects ((OTRS)) Community Edition: 5.0.41 and prior versions, 6.0.26 and prior versions. OTRS; 7.0.15 and prior versions.
Severity
7.3 (High)
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://otrs.com/release-notes/otrs-security-advi… | |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisory |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisory |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisory |
| https://lists.debian.org/debian-lts-announce/2023… | mailing-list |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| OTRS AG | ((OTRS)) Community Edition |
Affected:
5.0.41 and prior
Affected: 6.0.26 and prior |
|
| OTRS AG | OTRS |
Affected:
7.0.15 and prior
|
Date Public
2020-03-27 00:00
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CVE-2017-13992 (GCVE-0-2017-13992)
Vulnerability from cvelistv5 – Published: 2017-10-05 21:00 – Updated: 2024-08-05 19:13
VLAI
EPSS
VEX
Summary
An Insufficient Entropy issue was discovered in LOYTEC LVIS-3ME versions prior to 6.2.0. The application does not utilize sufficiently random number generation for the web interface authentication mechanism, which could allow remote code execution.
Severity
No CVSS data available.
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://ics-cert.us-cert.gov/advisories/ICSA-17-257-01 | x_refsource_MISC |
| http://www.securityfocus.com/bid/100847 | vdb-entryx_refsource_BID |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | LOYTEC LVIS-3ME |
Affected:
LOYTEC LVIS-3ME
|
Date Public
2017-10-05 00:00
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CVE-2017-2626 (GCVE-0-2017-2626)
Vulnerability from cvelistv5 – Published: 2018-07-27 19:00 – Updated: 2024-08-05 14:02
VLAI
EPSS
VEX
Summary
It was discovered that libICE before 1.0.9-8 used a weak entropy to generate keys. A local attacker could potentially use this flaw for session hijacking using the information available from the process list.
Severity
5.2 (Medium)
CWE
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://cgit.freedesktop.org/xorg/lib/libICE/comm… | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/201704-03 | vendor-advisoryx_refsource_GENTOO |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://access.redhat.com/errata/RHSA-2017:1865 | vendor-advisoryx_refsource_REDHAT |
| http://www.securitytracker.com/id/1037919 | vdb-entryx_refsource_SECTRACK |
| http://www.securityfocus.com/bid/96480 | vdb-entryx_refsource_BID |
| https://www.x41-dsec.de/lab/advisories/x41-2017-0… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2019/07/14/3 | mailing-listx_refsource_MLIST |
| https://lists.debian.org/debian-lts-announce/2019… | mailing-listx_refsource_MLIST |
Date Public
2017-02-28 00:00
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CVE-2017-2625 (GCVE-0-2017-2625)
Vulnerability from cvelistv5 – Published: 2018-07-27 18:00 – Updated: 2024-08-05 14:02
VLAI
EPSS
VEX
Summary
It was discovered that libXdmcp before 1.1.2 including used weak entropy to generate session keys. On a multi-user system using xdmcp, a local attacker could potentially use information available from the process list to brute force the key, allowing them to hijack other users' sessions.
Severity
6.5 (Medium)
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://security.gentoo.org/glsa/201704-03 | vendor-advisoryx_refsource_GENTOO |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://access.redhat.com/errata/RHSA-2017:1865 | vendor-advisoryx_refsource_REDHAT |
| http://www.securitytracker.com/id/1037919 | vdb-entryx_refsource_SECTRACK |
| https://cgit.freedesktop.org/xorg/lib/libXdmcp/co… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/96480 | vdb-entryx_refsource_BID |
| https://www.x41-dsec.de/lab/advisories/x41-2017-0… | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2019… | mailing-listx_refsource_MLIST |
Date Public
2018-07-27 00:00
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Mitigation
Implementation
Determine the necessary entropy to adequately provide for randomness and predictability. This can be achieved by increasing the number of bits of objects such as keys and seeds.
CAPEC-59: Session Credential Falsification through Prediction
This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.