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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-33337

Firebird has a buffer overflow when parsing corrupted slice packets

Description

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when deserializing a slice packet, the xdr_datum() function does not validate that a cstring length conforms to the slice descriptor bounds, allowing a cstring longer than the allocated buffer to overflow it. An unauthenticated attacker can exploit this by sending a crafted packet to the server, potentially causing a crash or other security impact. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

FirebirdSQL firebird

  • >= 3.0.0, < 3.0.14affected
  • >= 4.0.0, < 4.0.7affected
  • >= 5.0.0, < 5.0.4affected

References