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Vulnerability record · CVE-2018-19519 · published 25 November 2018

CVE-2018-19519: Tcpdump out-of-bounds read vulnerability

Tcpdump · Tcpdump

In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.

5.5 CVSS 3.0 Medium EPSS 2.4% · top 16.7% CWE-125 · Out-of-bounds readCWE-909 · CWE-909
5.5CVSS 3.0 base score, v2 4.3
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/106098 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:3976
https://github.com/zyingp/temp/blob/master/tcpdump.md ExploitMitigationThird Party Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44516
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62XY42U6HY3H2APR5EHNWCZ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNYXF3IY2X65IOD422SA6EQ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R2UDPOSGVJQIYC33SQBXMDX
https://usn.ubuntu.com/4252-1/
https://usn.ubuntu.com/4252-2/
http://www.securityfocus.com/bid/106098 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:3976
https://github.com/zyingp/temp/blob/master/tcpdump.md ExploitMitigationThird Party Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44516
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62XY42U6HY3H2APR5EHNWCZ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNYXF3IY2X65IOD422SA6EQ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R2UDPOSGVJQIYC33SQBXMDX
https://usn.ubuntu.com/4252-1/
https://usn.ubuntu.com/4252-2/

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-10103Tcpdump improper input validation vulnerabilitytcpdump before 4.9.3 mishandles the printing of SMB data (issue 1 of 2).EPSS 4.1%9.8CVE-2018-10105Tcpdump improper input validation vulnerabilitytcpdump before 4.9.3 mishandles the printing of SMB data (issue 2 of 2).EPSS 3.9%9.8CVE-2017-13053Tcpdump out-of-bounds read vulnerabilityThe BGP parser in tcpdump before 4.9.2 has a buffer over-read in print-bgp.c:decode_rt_routing_info().EPSS 3.2%9.8CVE-2017-13689Tcpdump out-of-bounds read vulnerabilityThe IKEv1 parser in tcpdump before 4.9.2 has a buffer over-read in print-isakmp.c:ikev1_id_print().EPSS 3.2%9.8CVE-2017-13051Tcpdump out-of-bounds read vulnerabilityThe RSVP parser in tcpdump before 4.9.2 has a buffer over-read in print-rsvp.c:rsvp_obj_print().EPSS 3.2%9.8CVE-2017-13687Tcpdump out-of-bounds read vulnerabilityThe Cisco HDLC parser in tcpdump before 4.9.2 has a buffer over-read in print-chdlc.c:chdlc_print().EPSS 3.3%9.8CVE-2017-13049Tcpdump out-of-bounds read vulnerabilityThe Rx protocol parser in tcpdump before 4.9.2 has a buffer over-read in print-rx.c:ubik_print().EPSS 3.4%9.8CVE-2017-13054Tcpdump out-of-bounds read vulnerabilityThe LLDP parser in tcpdump before 4.9.2 has a buffer over-read in print-lldp.c:lldp_private_8023_print().EPSS 3.2%

Source: NIST National Vulnerability Database (record CVE-2018-19519), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.