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CVE-2017-13687

31
FAUCET Score

CVE-2017-13687 describes a critical buffer over-read vulnerability in the Cisco HDLC parser within tcpdump versions prior to 4.9.2, affecting Debian Linux and tcpdump itself. With a CVSS score of 9.8 (Critical), this vulnerability is easily exploitable over the network without authentication, allowing for high impact to confidentiality, integrity, and availability. Despite its severity, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or KEV listing, though it has received some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.9.1CPE matchmatch criteria
cpe:2.3:a:tcpdump:tcpdump:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
3.28%
Probability of exploitation in next 30 days
EPSS Percentile
87.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0328 is in the 79th percentile among its peer group of 36,862 CVEs.

Social Chatter

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 (4)

github_advisorypatch availablevia nvd_reference
View patch
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-2017-13687Low

tcpdump: Buffer over-read in print-chdlc.c:chdlc_print() in Cisco HDLC parser

Sep 13, 2017

References

access.redhat.com / errata/RHEA-2018:0705
Third Party Advisory
github.com / the-tcpdump-group/tcpdump/commit/866c60236c41cea1e1654c8a071897292f64be49
Issue TrackingThird Party Advisory
github.com / the-tcpdump-group/tcpdump/commit/a1eefe986065846b6c69dbc09afd9fa1a02c4a3d
Issue TrackingPatchThird Party Advisory
security.gentoo.org / glsa/201709-23
Third Party Advisory
support.apple.com / HT208221
Third Party Advisory
debian.org / security/2017/dsa-3971
Third Party Advisory
securitytracker.com / id/1039307
Third Party AdvisoryVDB Entry
tcpdump.org / tcpdump-changes.txt
Vendor Advisory