CVE-2011-10029 json
Solar FTP Server <= 2.1.1 Malformed USER Denial of Service
published 2025-08-20 14 mo ago modified 2026-06-16 4 mo ago also EUVD-2011-5252
- cvss
- 8.7
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 65%
- public exploits
- 1
- Metasploit
Summary
Solar FTP Server fails to properly handle format strings passed to the USER command. When a specially crafted string containing format specifiers is sent, the server crashes due to a read access violation in the __output_1() function of sfsservice.exe. This results in a denial of service (DoS) condition.
Patch / fix
Timeline
- First public exploit (Metasploit auxiliary/dos/windows/ftp/solarftp_user)
- Published
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 14 mo ago
Exploit prediction
1.08% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Metasploit auxiliary/dos/windows/ftp/solarftp_user Solar FTP Server Malformed USER Denial of Service metasploit auxiliary, normal rank, 2011-02-22
- raw.githubusercontent.com https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/dos/windows/ftp/solarftp_user.rb referenced PoC, tagged "exploit" by a source, unverified
- exploit-db.com https://www.exploit-db.com/exploits/16204 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Flexbyte Software Solar FTP Server
Classification
- Weakness
-
- CWE-134 Use of Externally-Controlled Format String
References
-
web.archive.org
/web/20111009122553/http://solarftp.com/blog/news/solar-ftp-server-2-1-2.html
vendor-advisory, patch
-
raw.githubusercontent.com
/rapid7/metasploit-framework/master/modules/auxiliary/dos/windows/ftp/solarftp_user.rb
exploit
-
exploit-db.com
/exploits/16204
exploit
-
web.archive.org
/web/20111102141514/https://solarftp.com/
product
-
vulncheck.com
/advisories/solar-ftp-server-malformed-user-dos
third-party-advisory
Sources
- CVE List CVE-2011-10029
- NVD CVE-2011-10029
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.