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Fencer Vulns
critical 9.8

CVE-2017-11541 json

tcpdump 4.9.0 has a heap-based buffer over-read in the lldp_print function in print-lldp.c, related to util-print.c.

published 2017-07-23 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-3157

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.8%
EPSS 3.8% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

tcpdump 4.9.0 has a heap-based buffer over-read in the lldp_print function in print-lldp.c, related to util-print.c.

Patch / fix

  • tcpdump Debian 14, Debian 13, Debian 12 4.9.1-3

debian advisories DEBIAN-CVE-2017-11541

  • tcpdump Ubuntu 14.04 LTS 4.9.2-0ubuntu0.14.04.1
  • tcpdump Ubuntu 16.04 LTS 4.9.2-0ubuntu0.16.04.1

ubuntu advisories UBUNTU-CVE-2017-11541

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tcpdump RHEL 7 14:4.9.2-3.el7

red hat advisories RHEA-2018:0705

  • tcpdump SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2 +4 more 4.9.2-14.5.1
  • tcpdump SLES for SAP 11 SP4, SLES 11 SP4 3.9.8-1.30.5.1

suse advisories SUSE-SU-2017:2854-1SUSE-SU-2017:2690-1

  • tcpdump openSUSE Tumbleweed 4.99.1-1.2

opensuse advisories openSUSE-SU-2024:11425-1

  • tcpdump Arch Linux 4.9.2-1

arch linux advisories AVG-361

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-11541 updated cvss 5.3

tcpdump: heap-based buffer over-read in the lldp_print

  • Red Hat Enterprise Linux 5 tcpdump Red Hat Enterprise Linux 6 tcpdump
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) tcpdump 4.9.2-3.el7 Red Hat Enterprise Linux ComputeNode (v. 7) tcpdump 4.9.2-3.el7 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) tcpdump 4.9.2-3.el7 Red Hat Enterprise Linux Server (v. 7) tcpdump 4.9.2-3.el7 Red Hat Enterprise Linux Workstation (v. 7) tcpdump 4.9.2-3.el7
    fixed: vendor fix RHEA-2018:0705

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-19-155-01 updated cvss 9.8

PHOENIX CONTACT PLCNext AXC F 2152

  • Phoenix Contact AXC F 2152 2404267 version 1.x, 1046568 (Starterkit) version 1.x
    affected: vendor fix, mitigation “Phoenix Contact recommends affected users update to firmware release 2019.0 LTS or later, update to PLCNext Engineer release 2019.0 LTS or later, and apply the following specific mitigations below:” phoenixcontact.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

3.79% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/hackerlib/hackerlib-vul/tree/master/tcpdump-vul/heap-buffer-overflow/util-print referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.