CVE-2017-18509

CVSS V2 High 7.2 CVSS V3 High 7.8

Description

An issue was discovered in net/ipv6/ip6mr.c in the Linux kernel before 4.11. By setting a specific socket option, an attacker can control a pointer in kernel land and cause an inet_csk_listen_stop general protection fault, or potentially execute arbitrary code under certain circumstances. The issue can be triggered as root (e.g., inside a default LXC container or with the CAP_NET_ADMIN capability) or after namespace unsharing. This occurs because sk_type and protocol are not checked in the appropriate part of the ip6_mroute_* functions. NOTE: this affects Linux distributions that use 4.9.x longterm kernels before 4.9.187.

Overview

CVE ID
CVE-2017-18509

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2019-08-13T14:15:11

Last Modified Date
2023-02-07T22:01:00

Weakness Enumerations

CWE	URL
CWE-20	http://cwe.mitre.org/data/definitions/20.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version End
cpe:2.3:o:linux:linux_kernel::::::::	1	OR	4.11
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::	1	OR
cpe:2.3:o:debian:debian_linux:8.0:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:9.0:::::::*	1	OR
cpe:2.3:o:debian:debian_linux:10.0:::::::*	1	OR

CVSS Version 2

Version
2.0

Vector String
AV:L/AC:L/Au:N/C:C/I:C/A:C

Access Vector
LOCAL

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
COMPLETE

Integrity Impact
COMPLETE

Availability Impact
COMPLETE

Base Score
7.2

Severity
HIGH

Exploitability Score
3.9

Impact Score
10

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL

Attack Compatibility
LOW

Privileges Required
LOW

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
7.8

Base Severity
HIGH

Exploitability Score
1.8

Impact Score
5.9

References

Reference URL	Reference Tags
https://pulsesecurity.co.nz/advisories/linux-kernel-4.9-inetcsklistenstop-gpf	Exploit Third Party Advisory
https://salsa.debian.org/kernel-team/linux/commit/baefcdc2f29923e7325ce4e1a72c3ff0a9800f32	Third Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=99253eb750fda6a644d5188fb26c43bad8d5a745	Patch Vendor Advisory
https://github.com/torvalds/linux/commit/99253eb750fda6a644d5188fb26c43bad8d5a745	Patch Third Party Advisory
https://lists.openwall.net/netdev/2017/12/04/40	Mailing List Third Party Advisory
https://www.debian.org/security/2019/dsa-4497	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00016.html	Mailing List Third Party Advisory
https://seclists.org/bugtraq/2019/Aug/26	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html	Mailing List Third Party Advisory
http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html	Third Party Advisory VDB Entry
https://support.f5.com/csp/article/K41582535	Third Party Advisory
https://usn.ubuntu.com/4145-1/	Third Party Advisory
https://support.f5.com/csp/article/K41582535?utm_source=f5support&utm_medium=RSS	Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2017-18509
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18509

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 16:20:44				Added to TrackCVE
2022-12-04 00:59:08	2019-08-13T14:15Z	2019-08-13T14:15:11	CVE Published Date	updated
2022-12-04 00:59:08		2020-11-09T21:46:49	CVE Modified Date	updated
2022-12-04 00:59:08		Analyzed	Vulnerability Status	updated
2023-02-07 20:08:36	Analyzed	Undergoing Analysis	Vulnerability Status	updated
2023-02-07 23:08:20		2023-02-07T22:01:00	CVE Modified Date	updated
2023-02-07 23:08:21	Undergoing Analysis	Analyzed	Vulnerability Status	updated