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CVE-2009-2732

26
FAUCET Score

CVE-2009-2732 describes a denial-of-service vulnerability in ntop versions 3.3.10 and earlier. An attacker can trigger a NULL pointer dereference and crash the ntop daemon by sending a malformed HTTP Authorization header lacking a colon in the base64-decoded string. This vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity, requiring no authentication, and resulting in partial availability impact. While not listed on the KEV catalog, an ExploitDB entry exists, and there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.3.10CPE matchmatch criteria
cpe:2.3:a:ntop:ntop:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.27%
Probability of exploitation in next 30 days
EPSS Percentile
93.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-33176 · Aug 18, 2009
This CVE's current EPSS score of 0.0727 is in the 91st percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2009-2732Low

ntop: NULL pointer dereference by HTTP Basic Authentication (DoS)

Aug 8, 2009

References

secunia.com / advisories/36403
Vendor Advisory
mandriva.com / security/advisories
securityfocus.com / archive/1/505862/100/0/threaded
securityfocus.com / archive/1/505876/100/0/threaded
vupen.com / english/advisories/2009/2317
Vendor Advisory