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-2025-1828 (GCVE-0-2025-1828)
Vulnerability from cvelistv5 – Published: 2025-03-10 23:51 – Updated: 2025-09-09 13:56
VLAI
EPSS
VEX
Title
Perl's Crypt::Random module after 1.05 and before 1.56 may use rand() function for cryptographic functions
Summary
Crypt::Random Perl package 1.05 through 1.55 may use rand() function, which is not cryptographically strong, for cryptographic functions.
If the Provider is not specified and /dev/urandom or an Entropy Gathering Daemon (egd) service is not available Crypt::Random will default to use the insecure Crypt::Random::rand provider.
In particular, Windows versions of perl will encounter this issue by default.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-11 02:20 UTC
CWE
Assigner
CPANSec
CNA
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| perl | Crypt::Random |
Affected:
1.05 , < 1.56
(custom)
|
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CVE-2025-0577 (GCVE-0-2025-0577)
Vulnerability from cvelistv5 – Published: 2026-02-18 20:25 – Updated: 2026-02-25 16:54
VLAI
EPSS
VEX
Title
Glibc: vdso getrandom acceleration may return predictable randomness
Summary
An insufficient entropy vulnerability was found in glibc. The getrandom and arc4random family of functions may return predictable randomness if these functions are called again after the fork, which happens concurrently with a call to any of these functions.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-25 16:53 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
fedora
CNA
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2025-0577 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2338871 | issue-trackingx_refsource_REDHAT |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
2.39-28.fc40 , ≤ 2.39-33.fc40
(semver)
Affected: 2.40-12.fc41 , ≤ 2.40-17.fc41 (semver) |
|||
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
Date Public
2025-01-23 22:40
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CVE-2024-58134 (GCVE-0-2024-58134)
Vulnerability from cvelistv5 – Published: 2025-05-03 16:08 – Updated: 2025-10-20 20:09
VLAI
EPSS
VEX
Title
Mojolicious versions from 0.999922 for Perl uses a hard coded string, or the application's class name, as an HMAC session cookie secret by default
Summary
Mojolicious versions from 0.999922 for Perl uses a hard coded string, or the application's class name, as an HMAC session cookie secret by default.
These predictable default secrets can be exploited by an attacker to forge session cookies. An attacker who knows or guesses the secret could compute valid HMAC signatures for the session cookie, allowing them to tamper with or hijack another user’s session.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-12 15:57 UTC
Assigner
CPANSec
CNA
References
11 references
| URL | Tags |
|---|---|
| https://github.com/mojolicious/mojo/pull/1791 | issue-tracking |
| https://github.com/mojolicious/mojo/pull/2200 | issue-tracking |
| https://www.synacktiv.com/publications/baking-moj… | technical-description |
| https://medium.com/securing/baking-mojolicious-co… | technical-description |
| https://metacpan.org/release/SRI/Mojolicious-9.39… | related |
| https://github.com/hashcat/hashcat/pull/4090 | exploit |
| https://lists.debian.org/debian-perl/2025/05/msg0… | mailing-list |
| https://lists.debian.org/debian-perl/2025/05/msg0… | mailing-list |
| https://lists.debian.org/debian-perl/2025/05/msg0… | mailing-list |
| https://github.com/mojolicious/mojo/pull/2252 | issue-tracking |
| https://docs.mojolicious.org/Mojolicious/Guides/F… | technical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SRI | Mojolicious |
Affected:
0.999922 , ≤ *
(custom)
|
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CVE-2024-58040 (GCVE-0-2024-58040)
Vulnerability from cvelistv5 – Published: 2025-09-29 23:54 – Updated: 2025-09-30 13:37
VLAI
EPSS
VEX
Title
Crypt::RandomEncryption for Perl uses insecure rand() function during encryption
Summary
Crypt::RandomEncryption for Perl version 0.01 uses insecure rand() function during encryption.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-30 13:36 UTC
CWE
Assigner
CPANSec
CNA
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| QWER | Crypt::RandomEncryption |
Affected:
0.01 , ≤ *
(custom)
|
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CVE-2024-58036 (GCVE-0-2024-58036)
Vulnerability from cvelistv5 – Published: 2025-04-05 16:06 – Updated: 2025-09-05 13:19
VLAI
EPSS
VEX
Title
Net::Dropbox::API 1.9 and earlier for Perl uses insecure rand() function for cryptographic functions
Summary
Net::Dropbox::API 1.9 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.
Specifically Net::Dropbox::API uses the Data::Random library which specifically states that it is "Useful mostly for test programs". Data::Random uses the rand() function.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-07 14:32 UTC
CWE
Assigner
CPANSec
CNA
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| NORBU | Net::Dropbox::API |
Affected:
0 , ≤ 1.9
(custom)
|
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CVE-2024-57868 (GCVE-0-2024-57868)
Vulnerability from cvelistv5 – Published: 2025-04-05 15:35 – Updated: 2025-09-05 13:18
VLAI
EPSS
VEX
Title
Web::API 2.8 and earlier for Perl uses insecure rand() function for cryptographic functions
Summary
Web::API 2.8 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.
Specifically Web::API uses the Data::Random library which specifically states that it is "Useful mostly for test programs". Data::Random uses the rand() function.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-07 14:34 UTC
CWE
Assigner
CPANSec
CNA
References
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CVE-2024-56370 (GCVE-0-2024-56370)
Vulnerability from cvelistv5 – Published: 2025-04-05 18:26 – Updated: 2025-09-05 13:18
VLAI
EPSS
VEX
Title
Net::Xero 0.044 and earlier for Perl uses insecure rand() function for cryptographic functions
Summary
Net::Xero 0.044 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.
Specifically Net::Xero uses the Data::Random library which specifically states that it is "Useful mostly for test programs". Data::Random uses the rand() function.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-14 17:44 UTC
CWE
Assigner
CPANSec
CNA
References
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CVE-2024-52322 (GCVE-0-2024-52322)
Vulnerability from cvelistv5 – Published: 2025-04-05 16:19 – Updated: 2025-09-05 13:18
VLAI
EPSS
VEX
Title
WebService::Xero 0.11 for Perl uses insecure rand() function for cryptographic functions
Summary
WebService::Xero 0.11 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.
Specifically WebService::Xero uses the Data::Random library which specifically states that it is "Useful mostly for test programs". Data::Random uses the rand() function.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-07 14:31 UTC
CWE
Assigner
CPANSec
CNA
References
7 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| LOCALSHOP | WebService::Xero |
Affected:
0 , ≤ 0.11
(custom)
|
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CVE-2024-38270 (GCVE-0-2024-38270)
Vulnerability from cvelistv5 – Published: 2024-09-10 01:20 – Updated: 2024-09-10 15:15
VLAI
EPSS
VEX
Summary
An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authentication tokens generation exists in the Zyxel GS1900-10HP firmware version V2.80(AAZI.0)C0. This vulnerability could allow a LAN-based attacker a slight chance to gain a valid session token if multiple authenticated sessions are alive.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:13 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
Zyxel
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | GS1900-10HP firmware |
Affected:
V2.80(AAZI.0)C0
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CVE-2024-36400 (GCVE-0-2024-36400)
Vulnerability from cvelistv5 – Published: 2024-06-04 14:11 – Updated: 2024-08-02 03:37
VLAI
EPSS
VEX
Title
nano-id is unable to generate the correct character set
Summary
nano-id is a unique string ID generator for Rust. Affected versions of the nano-id crate incorrectly generated IDs using a reduced character set in the `nano_id::base62` and `nano_id::base58` functions. Specifically, the `base62` function used a character set of 32 symbols instead of the intended 62 symbols, and the `base58` function used a character set of 16 symbols instead of the intended 58 symbols. Additionally, the `nano_id::gen` macro is also affected when a custom character set that is not a power of 2 in size is specified. It should be noted that `nano_id::base64` is not affected by this vulnerability. This can result in a significant reduction in entropy, making the generated IDs predictable and vulnerable to brute-force attacks when the IDs are used in security-sensitive contexts such as session tokens or unique identifiers. The vulnerability is fixed in 0.4.0.
Severity
9.4 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-04 15:30 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/viz-rs/nano-id/security/adviso… | x_refsource_CONFIRM |
| https://github.com/viz-rs/nano-id/commit/a9022772… | x_refsource_MISC |
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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.