RSAVAGE Crypt::PasswdMD5 up to 1.42 on Perl weak prng

Summaryinfo

A vulnerability identified as problematic has been detected in RSAVAGE Crypt::PasswdMD5 up to 1.42 on Perl. Affected by this vulnerability is the function Crypt::PasswdMD5. This manipulation causes weak prng. The identification of this vulnerability is CVE-2026-6659. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in RSAVAGE Crypt::PasswdMD5 up to 1.42 on Perl. It has been declared as problematic. Affected by this vulnerability is the function Crypt::PasswdMD5. The manipulation with an unknown input leads to a weak prng vulnerability. The CWE definition for the vulnerability is CWE-338. The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong. As an impact it is known to affect confidentiality. The summary by CVE is:

Crypt::PasswdMD5 versions through 1.42 for Perl generates insecure random values for salts. The built-in rand function is predictable, and unsuitable for cryptography.

The advisory is shared at metacpan.org. This vulnerability is known as CVE-2026-6659 since 04/20/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 313440 (Linux Distros Unpatched Vulnerability : CVE-2026-6659), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (313440). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• RSAVAGE

Name

• Crypt::PasswdMD5

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.36
• 1.37
• 1.38
• 1.39
• 1.40
• 1.41
• 1.42

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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