src/remote/server.cpp in fbserver.exe in Firebird SQL 1.5 before 1.5.6, 2.0 before 2.0.6, 2.1 before 2.1.3, and 2.5 before 2.5 Beta 2 allows remote attackers to cause a denial of service (daemon crash) via a malformed op_connect_request message that triggers an infinite loop or NULL pointer dereference.
CVE-2009-2620
Also known asEUVD-2009-2615 (ENISA EUVD) · GHSA-rp94-92gp-7q47 (GitHub Security Advisories)Source: ENISA EUVD
- Public exploit code is available (Exploit-DB, marked verified by Exploit-DB)
A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).
- CVSS v3
- —
- EchelonGraph score
- Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
- EG Score
- —
- EG Risk
- —
- EPSS PROB
- 8.6%
- EPSS %ILE
- 95th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
- EG Severity
- Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
- EG Likelihood
- 8.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the BOD 26-04 block below.
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
July 29, 2009
Last Modified
August 7, 2024
References (7)
- http://www.securityfocus.com/bid/35842 (archived copy: the site no longer serves it)VDB Entry · Exploit · Patch
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01341.htmlVendor Advisory · Broken Link
- http://www.coresecurity.com/content/firebird-sql-dosExploit
- http://www.exploit-db.com/exploits/9295Exploit
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01370.htmlVendor Advisory · Broken Link
- https://bugzilla.redhat.com/show_bug.cgi?id=514463Issue Tracking
- http://tracker.firebirdsql.org/browse/CORE-2563Vendor Advisory
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 34× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
- 2026-11-01 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-31 16:26 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-30 16:26 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-29 18:29 UTCEG score recompute
- 2026-10-29 18:29 UTCGHSA enrichmentGHSA-rp94-92gp-7q47
- 2026-10-29 16:26 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-28 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-27 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-26 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-25 20:22 UTCEG score recompute
- 2026-10-25 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-24 16:26 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-23 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-22 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-21 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-20 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-19 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-18 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-18 11:43 UTCEG score recompute
- 2026-10-17 16:26 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-16 16:26 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-15 16:25 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-14 16:26 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-13 16:26 UTCEPSS rescoreEPSS 8.6% · 95th percentile
- 2026-10-12 21:45 UTCEG score recompute
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- 2026-10-12 16:26 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-10-12 01:53 UTCEG score recompute
- 2026-10-11 13:38 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-10-10 19:54 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-10-09 20:00 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-10-08 16:33 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-10-07 23:37 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-10-06 15:09 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-10-05 17:37 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-30 14:58 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-29 07:59 UTCEG score recompute
- 2026-09-27 13:39 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-26 15:52 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-24 13:57 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-17 19:20 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-15 03:04 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-12 14:54 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-10 09:24 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-06 13:41 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-05 15:22 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-09-04 13:55 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-08-28 21:34 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-08-27 14:19 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-08-25 13:43 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-08-19 16:58 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-08-15 01:24 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-08-09 13:41 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-08-08 16:31 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-08-06 13:41 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-08-03 10:28 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-07-30 16:22 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-07-30 01:26 UTCEPSS rescoreEPSS 8.6% · 94th percentile
- 2026-07-27 12:57 UTCEG score recompute
- 2026-07-27 12:57 UTCGHSA enrichmentGHSA-rp94-92gp-7q47
Publicly available exploits
(1 reference)Public exploit code is referenced for this CVE (1 Exploit-DB entry). No release with the fix is confirmed, so defenders should restrict or isolate affected systems accordingly until one is applied.
- Exploit-DBEDB-9295✓ verifiedPublished Jul 28, 2009
Firebird SQL - op_connect_request main listener shutdown
Open source ↗
Related CVEs(same CWE)
Same CWE
10 shownCWE-20
Frequently asked(4)
What is CVE-2009-2620?
When was CVE-2009-2620 made public?
Is CVE-2009-2620 actively exploited?
How do I remediate CVE-2009-2620?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2009-2620
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