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CVE-2018-18409

20
FAUCET Score

CVE-2018-18409 describes a stack-based buffer over-read vulnerability in the setbit() function within iptree.h of TCPFLOW version 1.5.0. This flaw, caused by incorrect value processing, can lead to a denial of service during address_histogram or get_histogram calls, affecting various Canonical, DigitalCorpora, and FedoraProject distributions of TCPFLOW. Rated with a CVSS score of 5.5 (Medium), this vulnerability requires local access and user interaction (UI:R) to trigger, resulting in high availability impact (A:H) but no confidentiality or integrity compromise. There is no evidence of active exploitation, and no public exploit code exists in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, indicating low public awareness and attention.

Impacted Technologies

VendorProductVersion(s)CPE
1.5.0CPE matchmatch criteria
cpe:2.3:a:digitalcorpora:tcpflow:1.5.0:*:*:*:*:*:*:*
28CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*
29CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.30%
Probability of exploitation in next 30 days
EPSS Percentile
67.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0130 is in the 78th percentile among its peer group of 5,758 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / simsong/tcpflow/issues/195
ExploitPatchThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/K6MP4YMCJX4ITOBFX427UMOA6E7ZLJDE
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/MN5FW6HKPDP7PI2IVNMFSQVIDSCQ5BOR
usn.ubuntu.com / 3955-1
Third Party Advisory