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CVE-2017-12993

27
FAUCET Score

CVE-2017-12993 describes a critical buffer over-read vulnerability (CWE-125) within the Juniper protocols parser of tcpdump versions prior to 4.9.2. This flaw, rated with a CVSS score of 9.8, allows an unauthenticated attacker to remotely execute arbitrary code or cause a denial of service without user interaction, leading to complete compromise of confidentiality, integrity, and availability. While the vulnerability is severe and has a high FAUCET Risk Score of 80/100, there is no evidence of active exploitation, nor are public exploits available in Metasploit or ExploitDB, and community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.9.1CPE matchmatch criteria
cpe:2.3:a:tcpdump:tcpdump:*:*:*:*:*:*:*:*

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
2.53%
Probability of exploitation in next 30 days
EPSS Percentile
83.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0253 is in the 73rd percentile among its peer group of 36,897 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-2017-12993Low

tcpdump: Buffer over-read in print-juniper.c, several functions in Juniper protocols parser

Sep 13, 2017

References

access.redhat.com / errata/RHEA-2018:0705
github.com / the-tcpdump-group/tcpdump/commit/b534e304568585707c4a92422aeca25cf908ff02
Issue TrackingPatchThird Party Advisory
security.gentoo.org / glsa/201709-23
support.apple.com / HT208221
debian.org / security/2017/dsa-3971
securitytracker.com / id/1039307
tcpdump.org / tcpdump-changes.txt
Vendor Advisory