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CVE-2017-11108

21
FAUCET Score

CVE-2017-11108 describes a heap-based buffer over-read vulnerability in tcpdump version 4.9.0, specifically within the EXTRACT_16BITS function when processing Spanning Tree Protocol (STP) data. This flaw allows remote attackers to trigger a denial of service by sending crafted packet data, leading to an application crash. Rated 7.5 HIGH, the vulnerability is easily exploitable over the network with no user interaction required, resulting in high availability impact. While there is no evidence of active exploitation or public exploit code, the vulnerability has received some community and media attention.

Impacted Technologies

VendorProductVersion(s)CPE
4.9.0CPE matchmatch criteria
cpe:2.3:a:tcpdump:tcpdump:4.9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.90%
Probability of exploitation in next 30 days
EPSS Percentile
91.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0490 is in the 85th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

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 (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: tcpdump-14:4.9.2-3.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: tcpdump
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: tcpdump

Vendor Advisories (1)

redhatCVE-2017-11108Low

tcpdump: Heap buffer overflow in the EXTRACT_16BITS function

Jul 7, 2017

References

access.redhat.com / errata/RHEA-2018:0705
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
security.gentoo.org / glsa/201709-23
support.apple.com / HT208221
debian.org / security/2017/dsa-3971