CVE-2019-20176 [High] | Denial of Service in Pure-Ftpd

CVE-2019-20176 is rated Moderate Risk (59.1/100): CVSS High severity, with high exploitation likelihood (EPSS 10.78%, 93th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-16	14.31%	10.78%	-3.52%
2	2026-03-05	22.33%	14.31%	-8.02%
3	2025-11-21	—	22.33%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-16

14.31%

10.78%

-3.52%

2026-03-05

22.33%

14.31%

-8.02%

2025-11-21

—

22.33%

—

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]

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]

OS Trackers for CVE-2019-20176

vendor	priority	summary	link
`alpine`	high	CVE-2019-20176: 1 source package rows (pure-ftpd); 2 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 2.	https://security.alpinelinux.org/vuln/CVE-2019-20176
`debian`	low	CVE-2019-20176 low priority: Debian including 1 source packages (pure-ftpd), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4.	https://security-tracker.debian.org/tracker/CVE-2019-20176
`suse`	high	CVE-2019-20176 severity important: SUSE including 2 source package names (pure-ftpd-1.0.43-30.8.1, pure-ftpd-1.0.50-1.1), 2 product×package rows across 2 product lines (SUSE Linux Enterprise Server 11 SP3-TERADATA, openSUSE Tumbleweed): Fixed 2.	https://www.suse.com/security/cve/CVE-2019-20176/
`ubuntu`	medium	CVE-2019-20176 medium priority: Ubuntu including 1 source packages (pure-ftpd), 18 status rows across 18 suites (bionic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 12, ignored 2, needs-triage 2, DNE 1, released 1.	https://ubuntu.com/security/CVE-2019-20176

Affected software / configurations for CVE-2019-20176

Vendor	Product	Version	Raw CPE
pureftpd	pure-ftpd	1.0.49	cpe:2.3:a:pureftpd:pure-ftpd:1.0.49:::::::*
fedoraproject	fedora	30	cpe:2.3:o:fedoraproject:fedora:30:::::::*
fedoraproject	fedora	31	cpe:2.3:o:fedoraproject:fedora:31:::::::*

References for CVE-2019-20176

URL	Tags
https://github.com/jedisct1/pure-ftpd/commit/aea56f4bcb9948d456f3fae4d044fd3fa2e19706	Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AHZG5FPCRMCB6Z3L7FPICC6BZ5ZATFTO/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PICL3U2J4EPGBLOE555Y5RAZTQL3WBBV/

URL

CVE-2019-20176

Exploit prediction scoring system (EPSS) score for CVE-2019-20176

Common vulnerability scoring system (CVSS) metrics for CVE-2019-20176

Weakness enumeration for CVE-2019-20176

OS Trackers for CVE-2019-20176

Affected software / configurations for CVE-2019-20176

References for CVE-2019-20176