CWE-338
Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.
CVE-2025-40916 (GCVE-0-2025-40916)
Vulnerability from cvelistv5 – Published: 2025-06-16 11:01 – Updated: 2025-06-16 13:31
VLAI
Title
Mojolicious::Plugin::CaptchaPNG version 1.05 for Perl uses a weak random number source for generating the captcha text
Summary
Mojolicious::Plugin::CaptchaPNG version 1.05 for Perl uses a weak random number source for generating the captcha.
That version uses the built-in rand() function for generating the captcha text as well as image noise, which is insecure.
Severity
9.1 (Critical)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GRYPHON | Mojolicious::Plugin::CaptchaPNG |
Affected:
1.05
(custom)
|
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CVE-2025-40918 (GCVE-0-2025-40918)
Vulnerability from cvelistv5 – Published: 2025-07-16 14:00 – Updated: 2025-11-04 21:10
VLAI
Title
Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely
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.
Severity
6.5 (Medium)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| EHUELS | Authen::SASL::Perl::DIGEST_MD5 |
Affected:
2.04 , ≤ 2.1800
(custom)
|
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CVE-2025-40919 (GCVE-0-2025-40919)
Vulnerability from cvelistv5 – Published: 2025-07-16 14:04 – Updated: 2025-07-16 20:49
VLAI
Title
Authen::DigestMD5 versions 0.01 through 0.04 for Perl generate the cnonce insecurely
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.
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Severity
6.5 (Medium)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SALVA | Authen::DigestMD5 |
Affected:
0.01 , ≤ 0.04
(custom)
|
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CVE-2025-40920 (GCVE-0-2025-40920)
Vulnerability from cvelistv5 – Published: 2025-08-11 20:19 – Updated: 2026-01-17 20:23
VLAI
Title
Catalyst::Authentication::Credential::HTTP versions 1.018 and earlier for Perl use insecurely generated nonces
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.
Severity
8.6 (High)
CWE
Assigner
References
6 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ETHER | Catalyst::Authentication::Credential::HTTP |
Affected:
0.06 , ≤ 1.018
(custom)
|
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CVE-2025-40923 (GCVE-0-2025-40923)
Vulnerability from cvelistv5 – Published: 2025-07-16 13:05 – Updated: 2025-11-04 21:10
VLAI
Title
Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely
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.
Severity
7.3 (High)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MIYAGAWA | Plack::Middleware::Session |
Affected:
0.01 , < 0.35
(custom)
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CVE-2025-40924 (GCVE-0-2025-40924)
Vulnerability from cvelistv5 – Published: 2025-07-17 13:33 – Updated: 2025-07-17 19:53
VLAI
Title
Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely
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.
Severity
6.5 (Medium)
CWE
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| HAARG | Catalyst::Plugin::Session |
Affected:
0.01 , < 0.44
(custom)
|
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CVE-2025-40925 (GCVE-0-2025-40925)
Vulnerability from cvelistv5 – Published: 2025-09-20 12:31 – Updated: 2025-09-22 17:27
VLAI
Title
Starch versions 0.14 and earlier generate session ids insecurely
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.
Severity
9.1 (Critical)
CWE
Assigner
References
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CVE-2025-40926 (GCVE-0-2025-40926)
Vulnerability from cvelistv5 – Published: 2026-03-05 01:24 – Updated: 2026-04-21 02:42
VLAI
Title
Plack::Middleware::Session::Simple versions before 0.05 for Perl generates session ids insecurely
Summary
Plack::Middleware::Session::Simple versions before 0.05 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.
Predictable session ids could allow an attacker to gain access to systems.
Plack::Middleware::Session::Simple is intended to be compatible with Plack::Middleware::Session, which had a similar security issue CVE-2025-40923.
Severity
9.8 (Critical)
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://metacpan.org/release/KAZEBURO/Plack-Middl… | |
| https://github.com/kazeburo/Plack-Middleware-Sess… | issue-tracking |
| https://github.com/kazeburo/Plack-Middleware-Sess… | patch |
| https://www.cve.org/CVERecord?id=CVE-2025-40923 | vendor-advisoryrelatedvdb-entry |
| https://security.metacpan.org/docs/guides/random-… | technical-description |
| https://metacpan.org/release/KAZEBURO/Plack-Middl… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| KAZEBURO | Plack::Middleware::Session::Simple |
Affected:
0 , < 0.05
(custom)
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CVE-2025-40931 (GCVE-0-2025-40931)
Vulnerability from cvelistv5 – Published: 2026-03-05 01:41 – Updated: 2026-04-21 02:42
VLAI
Title
Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id
Summary
Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id.
Apache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 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.
Note that the libapache-session-perl package in some Debian-based Linux distributions may be patched to use Crypt::URandom.
Severity
9.1 (Critical)
CWE
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://metacpan.org/dist/Apache-Session/source/l… | |
| https://security.metacpan.org/docs/guides/random-… | technical-description |
| https://github.com/chorny/Apache-Session/issues/4 | issue-tracking |
| https://rt.cpan.org/Ticket/Display.html?id=173631 | issue-tracking |
| https://www.openwall.com/lists/oss-security/2019/… | mailing-list |
| https://bugs.debian.org/cgi-bin/bugreport.cgi?bug… | issue-tracking |
| https://salsa.debian.org/perl-team/modules/packag… | patch |
| https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/… | issue-tracking |
| https://metacpan.org/pod/Apache::Session::Generat… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CHORNY | Apache::Session::Generate::MD5 |
Affected:
0 , ≤ 1.94
(custom)
|
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CVE-2025-40932 (GCVE-0-2025-40932)
Vulnerability from cvelistv5 – Published: 2026-02-26 23:33 – Updated: 2026-02-27 18:41
VLAI
Title
Apache::SessionX versions through 2.01 for Perl create insecure session id
Summary
Apache::SessionX versions through 2.01 for Perl create insecure session id.
Apache::SessionX generates session ids insecurely. The default session id generator in Apache::SessionX::Generate::MD5 returns a MD5 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.
Severity
8.2 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://metacpan.org/release/GRICHTER/Apache-Sess… | related |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GRICHTER | Apache::SessionX |
Affected:
0 , ≤ 2.01
(custom)
|
Credits
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Mitigation
Phase: Implementation
Description:
- Use functions or hardware which use a hardware-based random number generation for all crypto. This is the recommended solution. Use CyptGenRandom on Windows, or hw_rand() on Linux.
No CAPEC attack patterns related to this CWE.