CVE-2018-16300

The BGP parser in tcpdump before 4.9.3 allows stack consumption in print-bgp.c:bgp_attr_print() because of unlimited recursion.

Published: 2019-10-03 Last update: 2025-12-03 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-16300 is rated Moderate Risk (64.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.12%). EPSS rose +3.17% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-16300

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.95% 4.12% +3.17%
2 2026-05-26 0.28% 0.95% +0.67%
3 2025-11-21 — 0.28% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-16300

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-16300

OS Trackers for CVE-2018-16300

vendor priority summary link
alpine — CVE-2018-16300: 1 source package rows (tcpdump); 20 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 10. https://security.alpinelinux.org/vuln/CVE-2018-16300
debian not yet assigned CVE-2018-16300 not yet assigned priority: Debian including 1 source packages (tcpdump), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-16300
redhat low — https://access.redhat.com/security/cve/CVE-2018-16300
suse medium CVE-2018-16300 severity moderate: SUSE including 245 source package names (10.1-2.2.74:tcpdump-4.9.2-3.9.1, 10.1-4.1:tcpdump-4.9.2-3.9.1, …), 307 product×package rows across 77 product lines (Container suse/sle-micro/5.0/toolbox, Container suse/sle-micro/5.1/toolbox, … (77 product lines)): Known Affected 157, Fixed 150. https://www.suse.com/security/cve/CVE-2018-16300/
ubuntu medium CVE-2018-16300 medium priority: Ubuntu including 1 source packages (tcpdump), 6 status rows across 6 suites (bionic, disco, eoan, trusty, upstream, xenial): released 4, ignored 1, not-affected 1. https://ubuntu.com/security/CVE-2018-16300

Affected software / configurations for CVE-2018-16300

Vendor Product Version Raw CPE
tcpdump tcpdump < 4.9.3 cpe:2.3:a:tcpdump:tcpdump:*:*:*:*:*:*:*:*

References for CVE-2018-16300

URL Tags
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 Release Notes Third Party Advisory
https://github.com/the-tcpdump-group/tcpdump/commit/af2cf04a9394c1a56227c2289ae8da262828294a Patch Third Party Advisory
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
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