Advisory Details

August 21st, 2025

Firebird SQL Database Server XDR Message Parsing NULL Pointer Dereference Denial-of-Service Vulnerability

CVE ID	CVE-2025-54989
CVSS SCORE	7.5, AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AFFECTED VENDORS	Firebird
AFFECTED PRODUCTS	Firebird SQL
VULNERABILITY DETAILS	This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Firebird SQL. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of XDR messages. The issue results from dereferencing a null pointer. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
ADDITIONAL DETAILS	Firebird has issued an update to correct this vulnerability. More details can be found at: https://github.com/FirebirdSQL/firebird/commit/169da595f8693fc1a65a79c741724b1bc8db9f25
DISCLOSURE TIMELINE	2025-05-02 - Vulnerability reported to vendor 2025-08-21 - Coordinated public release of advisory 2025-08-21 - Advisory Updated
CREDIT	Anonymous

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