CVE-2019-15163

rpcapd/daemon.c in libpcap before 1.9.1 allows attackers to cause a denial of service (NULL pointer dereference and daemon crash) if a crypt() call fails.

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-2019-15163 is rated Moderate Risk (63.9/100): CVSS High severity, with high exploitation likelihood (EPSS 4.44%, 90th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.33% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize 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-2019-15163

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 2.11% 4.44% +2.33%
2 2026-05-27 1.72% 2.11% +0.39%
3 2026-03-13 — 1.72% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-15163

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]
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-2019-15163

OS Trackers for CVE-2019-15163

vendor priority summary link
alpine high CVE-2019-15163: 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-2019-15163
debian unimportant CVE-2019-15163 unimportant 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-2019-15163
redhat low — https://access.redhat.com/security/cve/CVE-2019-15163
suse medium CVE-2019-15163 severity moderate: SUSE including 13 source package names (libpcap-devel-1.10.1-150400.1.7, libpcap-devel-1.10.4-150600.1.4, …), 27 product×package rows across 21 product lines (SUSE Linux Enterprise Desktop 12 SP4, SUSE Linux Enterprise High Performance Computing 12 SP4, … (21 product lines)): Fixed 21, Known Not Affected 6. https://www.suse.com/security/cve/CVE-2019-15163/
ubuntu medium CVE-2019-15163 medium priority: Ubuntu including 1 source packages (libpcap), 6 status rows across 6 suites (bionic, disco, eoan, trusty, upstream, xenial): not-affected 5, released 1. https://ubuntu.com/security/CVE-2019-15163

Affected software / configurations for CVE-2019-15163

Vendor Product Version Raw CPE
tcpdump libpcap < 1.9.1 cpe:2.3:a:tcpdump:libpcap:*:*:*:*:*:*:*:*

References for CVE-2019-15163

URL Tags
http://seclists.org/fulldisclosure/2019/Dec/26
https://github.com/the-tcpdump-group/libpcap/blob/libpcap-1.9/CHANGES Third Party Advisory
https://github.com/the-tcpdump-group/libpcap/commit/437b273761adedcbd880f714bfa44afeec186a31 Patch 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
https://support.apple.com/kb/HT210785
https://support.apple.com/kb/HT210788
https://support.apple.com/kb/HT210789
https://support.apple.com/kb/HT210790
https://support.f5.com/csp/article/K92862401?utm_source=f5support&amp%3Butm_medium=RSS
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.tcpdump.org/public-cve-list.txt Third Party Advisory
cvelogic Threat Intelligence