CVE-2026-35215: CWE-369: Divide By Zero in FirebirdSQL firebird
Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the sdl_desc() function does not validate the length of a decoded SDL descriptor from a slice packet. A zero-length descriptor is later used to calculate the number of slice items, causing a division by zero. An unauthenticated attacker can exploit this by sending a crafted slice packet to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
AI Analysis
Technical Summary
FirebirdSQL firebird contains a divide-by-zero vulnerability (CWE-369) in the sdl_desc() function when handling slice packets with zero-length SDL descriptors. This improper validation leads to a division by zero error, causing the server to crash. The flaw affects versions prior to 3.0.14, 4.0.7, and 5.0.4. An unauthenticated attacker can trigger this denial of service by sending a crafted slice packet. The vulnerability has been addressed in the specified fixed versions.
Potential Impact
Successful exploitation results in a denial of service (server crash) without requiring authentication. There is no impact on confidentiality or integrity. The CVSS 3.1 base score is 7.5 (high), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Mitigation Recommendations
A fix is available in FirebirdSQL versions 3.0.14, 4.0.7, and 5.0.4. Users should upgrade to these or later versions to remediate this vulnerability. Patch status is confirmed by the vendor's versioning information. No alternative mitigations or workarounds are indicated.
CVE-2026-35215: CWE-369: Divide By Zero in FirebirdSQL firebird
Description
Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the sdl_desc() function does not validate the length of a decoded SDL descriptor from a slice packet. A zero-length descriptor is later used to calculate the number of slice items, causing a division by zero. An unauthenticated attacker can exploit this by sending a crafted slice packet to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
FirebirdSQL firebird contains a divide-by-zero vulnerability (CWE-369) in the sdl_desc() function when handling slice packets with zero-length SDL descriptors. This improper validation leads to a division by zero error, causing the server to crash. The flaw affects versions prior to 3.0.14, 4.0.7, and 5.0.4. An unauthenticated attacker can trigger this denial of service by sending a crafted slice packet. The vulnerability has been addressed in the specified fixed versions.
Potential Impact
Successful exploitation results in a denial of service (server crash) without requiring authentication. There is no impact on confidentiality or integrity. The CVSS 3.1 base score is 7.5 (high), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Mitigation Recommendations
A fix is available in FirebirdSQL versions 3.0.14, 4.0.7, and 5.0.4. Users should upgrade to these or later versions to remediate this vulnerability. Patch status is confirmed by the vendor's versioning information. No alternative mitigations or workarounds are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-01T18:48:58.937Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e2889bbdfbbecc59818afe
Added to database: 4/17/2026, 7:23:07 PM
Last enriched: 4/25/2026, 2:53:18 AM
Last updated: 6/1/2026, 10:33:20 AM
Views: 85
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