PatchTheCVECVE-2009-2732: The checkHTTPpassword function in http.c in ntop 3.3.10 and earlier allows remote attackers to cause a denial
CVE-2009-2732 is a medium-severity flaw (CVSS 5.0) affecting ntop. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The checkHTTPpassword function in http.c in ntop 3.3.10 and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an Authorization HTTP header that lacks a : (colon) character in the base64-decoded string.
Why this priority
- EPSS top 6%: very likely to be exploited
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.0 (Medium) |
| EPSS exploit chance | 7.3% (top 6%) |
| CISA exploited list | No |
| Weakness | CWE-119 |
| Published | 2009-08-21 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2009-2732?
ntop: upgrade to newer than 3.3.10. Exact commands for each OS are on this page.
Is CVE-2009-2732 being exploited?
CVE-2009-2732 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2009-2732 affect?
CVE-2009-2732 affects ntop. Severity is medium (CVSS 5.0). The checkHTTPpassword function in http.c in ntop 3.3.10 and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an Authorization HTTP header that lacks a : (colon) character in the ba
How urgent is CVE-2009-2732?
Priority 46/100. EPSS top 6%: very likely to be exploited; Public exploit reference
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