CVE-2019-20176

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

7.5 HighFix available

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

4.37%Up 3.5 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

Record: CVE-2019-20176
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-400
Updated: 2026-11-02

CVE List No score

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

Record: CVE-2019-20176
Updated: 2026-11-02

EUVDEUVD-2019-10730 No score

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

Record: EUVD-2019-10730
Updated: 2026-11-03

GitHub AdvisoriesGHSA-fgwh-frh9-vm43 7.5

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

Record: GHSA-fgwh-frh9-vm43
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-400
Updated: 2026-11-02

OSV 7.5

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

Record: CVE-2019-20176
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2019-20176 7.5

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

Record: DEBIAN-CVE-2019-20176
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2019-20176 7.5

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c.

Record: UBUNTU-CVE-2019-20176
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVMGASA-2020-0128 No score

Updated pure-ftpd packages fix security vulnerabilities

Updated pure-ftpd packages fix security vulnerabilities:

An issue was discovered in Pure-FTPd 1.0.49. An uninitialized pointer vulnerability has been detected in the diraliases linked list. When the *lookup_alias(const char alias) or print_aliases(void) function is called, they fail to correctly detect the end of the linked list and try to access a non-existent list member. This is related to init_aliases in diraliases.c. (CVE-2019-9274).

An issue was discovered in Pure-FTPd 1.0.49. An out-of-bounds (OOB) read has been detected in the pure_strcmp function in utils.c (CVE-2019-9365).

In Pure-FTPd 1.0.49, a stack exhaustion issue was discovered in the listdir function in ls.c (CVE-2019-20176).

Record: MGASA-2020-0128
Updated: 2026-11-02

OSVopenSUSE-SU-2024:11773-1 No score

pure-ftpd-1.0.50-1.1 on GA media

These are all security issues fixed in the pure-ftpd-1.0.50-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:11773-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`pure-ftpd` Debian:12	before 1.0.49-2	1.0.49-2
`pure-ftpd` Debian:13	before 1.0.49-2	1.0.49-2
`pure-ftpd` Mageia:7 From an advisory covering 3 CVEs	before 1.0.47-7.mga7	1.0.47-7.mga7
`pure-ftpd` Ubuntu:16.04:LTS	All versions, plus listed versions 1.0.36-3.21.0.36-3.2build11.0.36-3.2+deb8u1build0.16.04.1	None known
`pure-ftpd` Ubuntu:18.04:LTS	All versions, plus listed versions 1.0.46-11.0.46-1build11.0.46-1ubuntu18.04.1	None known
`pure-ftpd` openSUSE:Tumbleweed From an advisory covering 4 CVEs	before 1.0.50-1.1	1.0.50-1.1

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Nuclei	Pure-FTPd < 1.0.50 - DoS via Resource Exhaustion

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, Nuclei, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-20176 is a high vulnerability (CVSS 7.5) in Pureftpd Pure-ftpd, published December 31, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.37%, the 91st percentile. Fixed in pure-ftpd 1.0.49-2.

References

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