CVE-2009-2521 Denial of service in n/a
Remote authenticated users can crash the IIS FTP service via a crafted list command, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2009-2521?
CVE-2009-2521 is a medium-severity denial of service vulnerability in Microsoft Internet Information Services, published on 4 Sep 2009. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Stack consumption vulnerability in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 7.0 allows remote authenticated users to cause a denial of service (daemon crash) via a list (ls) -R command containing a wildcard that references a subdirectory, followed by a .. (dot dot), aka "IIS FTP Service DoS Vulnerability."
Weakness: CWE-400
Which versions are affected by CVE-2009-2521?
It affects 1 product.
Products include Microsoft Internet Information Services.
How do I fix CVE-2009-2521?
No fix has been published for CVE-2009-2521 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-2009-2521 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-2521 exists.
Public exploit code: 1 Metasploit module and 2 Exploit-DB entries.
Other vulnerabilities in Microsoft Internet Information Services
- CVE-2017-7269 Microsoft Windows Server Buffer Overflow
- CVE-2010-3972 Memory corruption in n/a
- CVE-2008-4301 Other in n/a
- CVE-2007-2815 The "hit-highlighting" functionality in webhits.dll in Microsoft Internet Information Services (IIS) Web Server 5.0 only uses Windows NT ACL
- CVE-2003-0224 Buffer overflow in ssinc.dll for Microsoft Internet Information Services (IIS) 5.0 allows local users to execute arbitrary code via a web pa
Sources
Also known as GHSA-w8g4-h8cc-352m.