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CVE-2017-11543

26
FAUCET Score

CVE-2017-11543 describes a critical buffer overflow vulnerability in tcpdump version 4.9.0, specifically within the sliplink_print function in print-sl.c. This flaw carries a CVSS score of 9.8, indicating a severe risk with a network-based attack vector, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered some community attention and media coverage, including a mention of its fix in a hackernews article.

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

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.20%
Probability of exploitation in next 30 days
EPSS Percentile
92.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0620 is in the 87th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 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-2017-11543Low

tcpdump: buffer overflow in the sliplink_print function

Jul 18, 2017

References

access.redhat.com / errata/RHEA-2018:0705
github.com / hackerlib/hackerlib-vul/tree/master/tcpdump-vul/global-overflow/print-sl
ExploitThird Party Advisory
security.gentoo.org / glsa/201709-23
support.apple.com / HT208221
debian.org / security/2017/dsa-3971
securityfocus.com / bid/99939
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039307