CVE-2025-23016

Summary

FastCGI fcgi2 (aka fcgi) 2.x through 2.4.4 has an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c.

Affected Software

Weaknesses

• CWE-190: CWE-190 Integer Overflow or Wraparound

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

Additional References

• https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2025/04/23/4
• https://lists.debian.org/debian-lts-announce/2025/10/msg00009.html

References

• https://github.com/FastCGI-Archives/fcgi2/issues/67
• https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5
• https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library

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