CVE-2018-1065

kernel: netfilter: xtables NULL pointer dereference in ip6_tables.c:ip6t_do_table() leading to a crash

Severity Score

4.7

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The netfilter subsystem in the Linux kernel through 4.15.7 mishandles the case of a rule blob that contains a jump but lacks a user-defined chain, which allows local users to cause a denial of service (NULL pointer dereference) by leveraging the CAP_NET_RAW or CAP_NET_ADMIN capability, related to arpt_do_table in net/ipv4/netfilter/arp_tables.c, ipt_do_table in net/ipv4/netfilter/ip_tables.c, and ip6t_do_table in net/ipv6/netfilter/ip6_tables.c.

El subsistema netfilter en el kernel de Linux, hasta la versión 4.15.7, gestiona de manera incorrecta el caso de una regla blob que contiene un salto pero carece de una cadena definida por el usuario. Esto permite que usuarios locales provoquen una denegación de servicio (DoS) aprovechando las capacidades CAP_NET_RAW o CAP_NET_ADMIN, relacionadas con arpt_do_table en net/ipv4/netfilter/arp_tables.c, ipt_do_table en net/ipv4/netfilter/ip_tables.c y ip6t_do_table en net/ipv6/netfilter/ip6_tables.c.

A flaw was found in the netfilter/iptables subsystem. A user with the netfilter modification capabilities could insert a rule which could panic the system.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-12-04 CVE Reserved
2018-03-02 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (12)

URL	Tag	Source
http://lists.openwall.net/netdev/2018/01/27/46	Third Party Advisory
http://www.securitytracker.com/id/1040446	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=57ebd808a97d7c5b1e1afb937c2db22beba3c1f8	2023-02-13
http://patchwork.ozlabs.org/patch/870355	2023-02-13
https://github.com/torvalds/linux/commit/57ebd808a97d7c5b1e1afb937c2db22beba3c1f8	2023-02-13

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:2948	2023-02-13
https://bugzilla.redhat.com/show_bug.cgi?id=1547824	2018-10-30
https://usn.ubuntu.com/3654-1	2023-02-13
https://usn.ubuntu.com/3654-2	2023-02-13
https://usn.ubuntu.com/3656-1	2023-02-13
https://www.debian.org/security/2018/dsa-4188	2023-02-13
https://access.redhat.com/security/cve/CVE-2018-1065	2018-10-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 4.15.7 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.15.7"		-		Affected