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CVE-2019-11360

Published: 12 July 2019

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.

Notes

AuthorNote
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.

Priority

Negligible

Cvss 3 Severity Score

4.2

Score breakdown

Status

Package Release Status
iptables
Launchpad, Ubuntu, Debian
bionic Not vulnerable

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Not vulnerable
(1.8.3-2ubuntu4)
focal Not vulnerable
(1.8.3-2ubuntu4)
trusty Not vulnerable

upstream
Released (1.8.3-2)
xenial Not vulnerable

Patches:
upstream: https://git.netfilter.org/iptables/commit/iptables/xshared.c?id=2ae1099a42e6a0f06de305ca13a842ac83d4683e (1.8.3)
upstream: https://git.netfilter.org/iptables/commit/iptables/xshared.c?id=2ae1099a42e6a0f06de305ca13a842ac83d4683e

Severity score breakdown

Parameter Value
Base score 4.2
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