CVE-2011-10029 Solar FTP Server <= 2.1.1 Malformed USER Denial of Service
A remote attacker can crash the Solar FTP Server by sending a malformed USER command, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2011-10029?
CVE-2011-10029 is a high-severity denial of service vulnerability in Flexbyte Software Solar FTP Server, published on 20 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-134
Which versions are affected by CVE-2011-10029?
How do I fix CVE-2011-10029?
No fix has been published for CVE-2011-10029 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2011-10029 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-10029 exists.
Public exploit code: 1 Metasploit module.
Sources
Also known as GHSA-f3r7-pgvq-gjh2.