Servers and applications
CVE-2011-3348
The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary "error state" in the backend server) via a malformed HTTP request.
- Severity
- Medium 4.3
- Published
- 20 Sept 2011
- Last changed
- 16 Jun 2026
- Added to UpHeron
- 17 Oct 2026
- Exploit chance
- 22% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 12 Nov 2026
- Attack
- Over the network · No login needed
- Attacker can
- Slow it down
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:P- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
Apache HTTP ServerServers and applications · cpe:a:apache:http_server |
|