CVE-2019-17383

netaddr before 1.5.3 and 2.0.4 has Incorrect Default Permissions

9.8 CriticalFix available

The netaddr gem before 2.0.4 for Ruby has misconfigured file permissions, such that a gem install may result in 0777 permissions in the target filesystem.

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: High
Integrity: High
Availability: High

Exploit likelihood

2.35%Up 1.7 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

The netaddr gem before 2.0.4 for Ruby has misconfigured file permissions, such that a gem install may result in 0777 permissions in the target filesystem.

Record: CVE-2019-17383
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-276
Updated: 2026-11-02

CVE List No score

The netaddr gem before 2.0.4 for Ruby has misconfigured file permissions, such that a gem install may result in 0777 permissions in the target filesystem.

Record: CVE-2019-17383
Updated: 2026-11-02

EUVDEUVD-2019-0684 No score

The netaddr gem before 2.0.4 for Ruby has misconfigured file permissions, such that a gem install may result in 0777 permissions in the target filesystem.

Record: EUVD-2019-0684
Updated: 2026-11-03

GitHub AdvisoriesGHSA-49pj-69vf-c689 9.8

netaddr before 1.5.3 and 2.0.4 has Incorrect Default Permissions

The netaddr gem before 1.5.3 and 2.0.4 for Ruby has misconfigured file permissions, such that a gem install may result in 0777 permissions in the target filesystem.

Record: GHSA-49pj-69vf-c689
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-276
Updated: 2026-11-02

OSV 9.8

The netaddr gem before 2.0.4 for Ruby has misconfigured file permissions, such that a gem install may result in 0777 permissions in the target filesystem.

Record: CVE-2019-17383
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-49pj-69vf-c689 9.8

netaddr before 1.5.3 and 2.0.4 has Incorrect Default Permissions

The netaddr gem before 1.5.3 and 2.0.4 for Ruby has misconfigured file permissions, such that a gem install may result in 0777 permissions in the target filesystem.

Record: GHSA-49pj-69vf-c689
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-276
Updated: 2026-11-02

OSVUBUNTU-CVE-2019-17383 9.8

The netaddr gem before 2.0.4 for Ruby has misconfigured file permissions, such that a gem install may result in 0777 permissions in the target filesystem.

Record: UBUNTU-CVE-2019-17383
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

netaddr project netaddr

Affected packages

Affected packages
Package	Affected	Fixed
`netaddr` RubyGems	2.0.0 up to 2.0.4	2.0.4
`netaddr` RubyGems	before 1.5.3	1.5.3
`netaddr` RubyGems	2.0.0 up to 2.0.4, plus listed versions 2.0.12.0.3	2.0.4
`netaddr` RubyGems	before 1.5.3, plus listed versions 1.0.01.1.01.2.01.3.01.4.01.5.01.5.1	1.5.3
`ruby-netaddr` Ubuntu:18.04:LTS	All versions, plus listed versions 1.5.1-2	None known
`ruby-netaddr` Ubuntu:20.04:LTS	All versions, plus listed versions 1.5.1-2	None known
`ruby-netaddr` Ubuntu:22.04:LTS	All versions, plus listed versions 1.5.1-3	None known
`ruby-netaddr` Ubuntu:24.04:LTS	All versions, plus listed versions 1.5.1-3	None known
`ruby-netaddr` Ubuntu:25.10	All versions, plus listed versions 1.5.1-31.5.1-4	None known
`ruby-netaddr` Ubuntu:26.10	All versions, plus listed versions 2.0.6-12.0.6-2	None known
`ruby-netaddr` Ubuntu:26.04:LTS	All versions, plus listed versions 1.5.1-42.0.6-1	None known

History

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

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

In short

CVE-2019-17383 is a critical vulnerability (CVSS 9.8) in Netaddr Project Netaddr, published October 9, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.35%, the 83rd percentile. Fixed in netaddr 2.0.4.

References

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