Vulnerability identifier: #VU19150

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-11360

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
iptables
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: netfilter

Description

The vulnerability allows an attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in add_param_to_argv() function in iptables/xshared.c when parsing, passed as argument to iptables-restore. A remote attacker can create a specially crafted files with iptables rules, trick a system administrator to pass it to the iptables-restore tool, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires significant social engineering.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

iptables: 1.8.2

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External links
http://0day.work/cve-2019-11360-bufferoverflow-in-iptables-restore-v1-8-2/
http://git.netfilter.org/iptables/commit/iptables/xshared.c?id=2ae1099a42e6a0f06de305ca13a842ac83d4...

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.