CVE-2019-15165

sf-pcapng.c in libpcap before 1.9.1 does not properly validate the PHB header length before allocating memory.

Published: 2019-10-03 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-15165 is rated Moderate Risk (50.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.83%). 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-2019-15165

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 3.20% 2.83% -0.36%
2 2026-05-27 1.03% 3.20% +2.17%
3 2026-03-15 — 1.03% —

Full EPSS history (35 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-15165

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N 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:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L 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:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 134c704f-9b21-4f2e-91b3-4a467353bcc0
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N 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:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2019-15165

OS Trackers for CVE-2019-15165

vendor priority summary link
alpine — CVE-2019-15165: 1 source package rows (libpcap); 9 state rows across 9 repos (3.10-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 9, open 0. https://security.alpinelinux.org/vuln/CVE-2019-15165
debian low CVE-2019-15165 low priority: Debian including 1 source packages (libpcap), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-15165
redhat low — https://access.redhat.com/security/cve/CVE-2019-15165
suse medium CVE-2019-15165 severity moderate: SUSE including 37 source package names (0.38.1:libpcap1-1.8.1-4.3.1, 10.1-4.1:libpcap1-1.8.1-4.3.1, …), 144 product×package rows across 75 product lines (Container suse/sle-micro/5.0/toolbox, Container suse/sles/15.2/virt-launcher, … (75 product lines)): Fixed 138, Known Not Affected 6. https://www.suse.com/security/cve/CVE-2019-15165/
ubuntu medium CVE-2019-15165 medium priority: Ubuntu including 1 source packages (libpcap), 6 status rows across 6 suites (bionic, disco, eoan, trusty, upstream, xenial): released 5, not-affected 1. https://ubuntu.com/security/CVE-2019-15165

Affected software / configurations for CVE-2019-15165

Vendor Product Version Raw CPE
tcpdump libpcap < 1.9.1 cpe:2.3:a:tcpdump:libpcap:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
opensuse leap 15.0 cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
opensuse leap 15.1 cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
oracle communications_operations_monitor 3.4 cpe:2.3:a:oracle:communications_operations_monitor:3.4:*:*:*:*:*:*:*
oracle communications_operations_monitor 4.0 cpe:2.3:a:oracle:communications_operations_monitor:4.0:*:*:*:*:*:*:*
oracle communications_operations_monitor 4.1 cpe:2.3:a:oracle:communications_operations_monitor:4.1:*:*:*:*:*:*:*
oracle communications_operations_monitor 4.2 cpe:2.3:a:oracle:communications_operations_monitor:4.2:*:*:*:*:*:*:*
oracle communications_operations_monitor 4.3 cpe:2.3:a:oracle:communications_operations_monitor:4.3:*:*:*:*:*:*:*
apple ipados 13.3 cpe:2.3:o:apple:ipados:13.3:*:*:*:*:*:*:*
apple iphone_os 13.3 cpe:2.3:o:apple:iphone_os:13.3:*:*:*:*:*:*:*
apple mac_os_x >= 10.13, < 10.13.6 cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
apple mac_os_x 10.13.6 cpe:2.3:o:apple:mac_os_x:10.13.6:security_update_2019-007:*:*:*:*:*:*
apple mac_os_x 10.14.6 cpe:2.3:o:apple:mac_os_x:10.14.6:security_update_2019-002:*:*:*:*:*:*
apple mac_os_x 10.15.2 cpe:2.3:o:apple:mac_os_x:10.15.2:*:*:*:*:*:*:*
apple tvos 13.3 cpe:2.3:o:apple:tvos:13.3:*:*:*:*:*:*:*
apple watchos 6.1.1 cpe:2.3:o:apple:watchos:6.1.1:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 19.04 cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
fedoraproject fedora 29 cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
fedoraproject fedora 30 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
fedoraproject fedora 31 cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

References for CVE-2019-15165

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00051.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00052.html Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2019/Dec/26 Issue Tracking Mailing List Third Party Advisory
https://github.com/the-tcpdump-group/libpcap/blob/libpcap-1.9/CHANGES Product Release Notes
https://github.com/the-tcpdump-group/libpcap/commit/87d6bef033062f969e70fa40c43dfd945d5a20ab Patch Third Party Advisory
https://github.com/the-tcpdump-group/libpcap/commit/a5a36d9e82dde7265e38fe1f87b7f11c461c29f6 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00031.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00014.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5P5K3DQ4TFSZBDB3XN4CZNJNQ3UIF3D3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GBIEKWLNIR62KZ5GA7EDXZS52HU6OE5F/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UZTIPUWABYUE5KQOLCKAW65AUUSB7QO6/
https://seclists.org/bugtraq/2019/Dec/23 Mailing List Third Party Advisory
https://support.apple.com/kb/HT210785 Third Party Advisory
https://support.apple.com/kb/HT210788 Third Party Advisory
https://support.apple.com/kb/HT210789 Third Party Advisory
https://support.apple.com/kb/HT210790 Third Party Advisory
https://usn.ubuntu.com/4221-1/ Third Party Advisory
https://usn.ubuntu.com/4221-2/ Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html Third Party Advisory
https://www.tcpdump.org/public-cve-list.txt Vendor Advisory
cvelogic Threat Intelligence