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.
88 vulnerabilities reference this CWE, most recent first.
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
VulnCheck
CNA
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
dell
CNA
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
dell
CNA
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
OTRS
CNA
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
icscert
CNA
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
redhat
CNA
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
redhat
CNA
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 |
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| 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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CVE-2012-4687 (GCVE-0-2012-4687)
Vulnerability from cvelistv5 – Published: 2012-12-08 15:00 – Updated: 2025-07-09 18:27
VLAI
EPSS
VEX
Title
Post Oak Bluetooth Traffic Systems Insufficient Entropy
Summary
Post Oak AWAM Bluetooth Reader Traffic System does not use a sufficient source of entropy for private keys, which makes it easier for man-in-the-middle attackers to spoof a device by predicting a key value.
Severity
No CVSS data available.
CWE
Assigner
icscert
CNA
References
3 references
| URL | Tags |
|---|---|
| https://www.cisa.gov/news-events/ics-advisories/i… | |
| http://www.postoaktraffic.com/contact.aspx | |
| http://www.us-cert.gov/control_systems/pdf/ICSA-1… | x_refsource_MISCx_transferred |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Post Oak Traffic Systems | AWAM Bluetooth Reader Traffic System |
Affected:
All versions
|
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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.