CVE-2019-11360

Publication date 12 July 2019

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A buffer overflow in iptables-restore in netfilter iptables 1.8.2 allows an attacker to (at least) crash the program or potentially gain code execution via a specially crafted iptables-save file. This is related to add_param_to_argv in xshared.c.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
iptables	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Ignored end of life
	18.10 cosmic	Ignored end of life
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

To exploit this, you would need to trick someone into restoring a set of iptables rules from a malicious iptables-save file. This is quite an unlikely scenario. Reproducer doesn't work on xenial and bionic, like an issue in 1.8.2 only.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
iptables	Upstream: iptable Upstream: iptable

Severity score breakdown

Parameter	Value
Base score	4.2 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	High
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H