ASPEER WebDyne::Session up to 2.075 on Perl rand generation of predictable numbers or identifiers

Summaryinfo

A vulnerability described as problematic has been identified in ASPEER WebDyne::Session up to 2.075 on Perl. This affects the function rand. Executing a manipulation can lead to generation of predictable numbers or identifiers. The identification of this vulnerability is CVE-2026-5084. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in ASPEER WebDyne::Session up to 2.075 on Perl. This vulnerability affects the function rand. The manipulation with an unknown input leads to a generation of predictable numbers or identifiers vulnerability. The CWE definition for the vulnerability is CWE-340. The product uses a scheme that generates numbers or identifiers that are more predictable than required. As an impact it is known to affect confidentiality. CVE summarizes:

WebDyne::Session versions through 2.075 for Perl generates the session id insecurely. The session handler generates the session id from an MD5 hash seeded with a call to the built-in rand() function. The rand function is passed a maximum value based on the process id, the epoch time and the reference address of the object, but this information will have no effect on the overall quality of the seed of the message digest. The rand function is seeded by 32-bits and is predictable. It is considered unsuitable for cryptographic purposes. Predictable session ids could allow an attacker to gain access to systems. Note that WebDyne::Session versions 1.042 and earlier appear to be in separate distributions from WebDyne.

The advisory is shared for download at metacpan.org. This vulnerability was named CVE-2026-5084 since 03/28/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1600.001.

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

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Productinfo

Vendor

• ASPEER

Name

• WebDyne::Session

Version

• 2.075

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CPE 2.2info

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