CVE-2002-1123
Buffer overflow in the authentication function for Microsoft SQL Server 2000 and Microsoft Desktop Engine (MSDE) 2000 allows remote…
- 7.5HighCVSS base score
- 77.7%Exploitation in 30 daysEPSS · top 0.4% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 3Public exploitsMetasploit, Nuclei and Exploit-DB
Description
Buffer overflow in the authentication function for Microsoft SQL Server 2000 and Microsoft Desktop Engine (MSDE) 2000 allows remote attackers to execute arbitrary code via a long request to TCP port 1433, aka the "Hello" overflow.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module and 2 Exploit-DB entries for it.
Show the exploits3
Metasploit modules1 module
- MS02-056 Microsoft SQL Server Hello Overflow (Metasploit module) (opens in a new tab)
exploit/windows/mssql/ms02_056_helloRank gooddisclosed 5 Aug 2002
Exploit-DB2 entries
- Microsoft SQL Server - Hello Overflow (MS02-056) (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 16398remote, windowspublished 30 Apr 2010Verified
- Microsoft SQL Server 2000 - User Authentication Remote Buffer Overflow (Exploit-DB entry) (opens in a new tab)
EDB-ID 21693remote, windowspublished 6 Aug 2002Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 24 months later
· 24 months later
Published
- 20 years later
· 20 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 77.7% · top 0.4% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
6
- 20020806 SPIKE 2.5 and associated vulns (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 5411 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- MS02-056 (opens in a new tab)vendor-advisoryx_refsource_MSx_transferred
- N-003 (opens in a new tab)third-party-advisorygovernment-resourcex_refsource_CIACx_transferred
- mssql-preauth-bo(9788) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 20020807 MS SQL Server Hello Overflow NASL script (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2002-1111 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2002-1123)Record last updated .