CVE-2018-14466

CVE-2018-14466 is a high-severity vulnerability in Tcpdump with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• CVSS v2: 5.0
• EPSS exploit prediction: 4% (89th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-125
• Affected product: Tcpdump
• Published: 2019-10-03
• Last modified: 2026-06-17

Description

The Rx parser in tcpdump before 4.9.3 has a buffer over-read in print-rx.c:rx_cache_find() and rx_cache_insert().

Frequently asked questions

What is CVE-2018-14466?

The Rx parser in tcpdump before 4.9.3 has a buffer over-read in print-rx.c:rx_cache_find() and rx_cache_insert().

How severe is CVE-2018-14466?

CVE-2018-14466 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-14466 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-14466?

CVE-2018-14466 primarily affects Tcpdump. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-14466?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-14466 published?

CVE-2018-14466 was published on 2019-10-03 and last updated on 2026-06-17.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00050.html
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00053.html
• http://seclists.org/fulldisclosure/2019/Dec/26
• https://github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES
• https://github.com/the-tcpdump-group/tcpdump/commit/c24922e692a52121e853a84ead6b9337f4c08a94
• https://lists.debian.org/debian-lts-announce/2019/10/msg00015.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62XY42U6HY3H2APR5EHNWCZ7SAQNMMJN/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNYXF3IY2X65IOD422SA6EQUULSGW7FN/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R2UDPOSGVJQIYC33SQBXMDXHH4QDSDMU/
• https://seclists.org/bugtraq/2019/Dec/23
• https://seclists.org/bugtraq/2019/Oct/28
• https://security.netapp.com/advisory/ntap-20200120-0001/
• https://support.apple.com/kb/HT210788
• https://usn.ubuntu.com/4252-1/
• https://usn.ubuntu.com/4252-2/
• https://www.debian.org/security/2019/dsa-4547

Affected products (12)

• cpe:2.3:a:tcpdump:tcpdump:*:*:*:*:*:*:*:*
• cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*

More vulnerabilities in Tcpdump

• CVE-2018-10105 — Critical (CVSS 9.8): tcpdump before 4.9.3 mishandles the printing of SMB data (issue 2 of 2).
• CVE-2018-10103 — Critical (CVSS 9.8): tcpdump before 4.9.3 mishandles the printing of SMB data (issue 1 of 2).
• CVE-2017-13725 — Critical (CVSS 9.8): The IPv6 routing header parser in tcpdump before 4.9.2 has a buffer over-read in print-rt6.c:rt6_print().
• CVE-2017-13690 — Critical (CVSS 9.8): The IKEv2 parser in tcpdump before 4.9.2 has a buffer over-read in print-isakmp.c, several functions.
• CVE-2017-13689 — Critical (CVSS 9.8): The IKEv1 parser in tcpdump before 4.9.2 has a buffer over-read in print-isakmp.c:ikev1_id_print().
• CVE-2017-13688 — Critical (CVSS 9.8): The OLSR parser in tcpdump before 4.9.2 has a buffer over-read in print-olsr.c:olsr_print().

All CVEs affecting Tcpdump →

Other CWE-125 (Out-of-bounds Read) vulnerabilities

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• CVE-2024-22004 — Critical (CVSS 10.0): Due to length check, an attacker with privilege access on a Linux Nonsecure operating system can trigger a…
• CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
• CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
• CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
• CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

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