CVE-2025-66565

Summary

Fiber Utils is a collection of common functions created for Fiber. In versions 2.0.0-rc.3 and below, when the system's cryptographic random number generator (crypto/rand) fails, both functions silently fall back to returning predictable UUID values, including the zero UUID "00000000-0000-0000-0000-000000000000". The vulnerability occurs through two related but distinct failure paths, both ultimately caused by crypto/rand.Read() failures, compromising the security of all Fiber applications using these functions for security-critical operations. This issue is fixed in version 2.0.0-rc.4.

Affected Software

Weaknesses

• CWE-252: CWE-252: Unchecked Return Value
• CWE-331: CWE-331: Insufficient Entropy
• CWE-338: CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: total

Additional References

• https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr

References

• https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr
• https://github.com/gofiber/utils/commit/6c6cf047032b9c8dff43d29f990b4b10e9b02d47

• ←Previous
• Next→