CVE-2017-17448

high

Description

net/netfilter/nfnetlink_cthelper.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for new, get, and del operations, which allows local users to bypass intended access restrictions because the nfnl_cthelper_list data structure is shared across all net namespaces.

References

http://www.securityfocus.com/bid/102117

https://access.redhat.com/errata/RHSA-2018:0654

https://access.redhat.com/errata/RHSA-2018:0676

https://access.redhat.com/errata/RHSA-2018:1062

https://patchwork.kernel.org/patch/10089373/

https://usn.ubuntu.com/3617-1/

https://usn.ubuntu.com/3617-2/

https://usn.ubuntu.com/3617-3/

https://usn.ubuntu.com/3619-1/

https://usn.ubuntu.com/3619-2/

https://usn.ubuntu.com/3620-1/

https://usn.ubuntu.com/3620-2/

https://usn.ubuntu.com/3632-1/

https://www.debian.org/security/2017/dsa-4073

https://www.debian.org/security/2018/dsa-4082

Details

Source: MITRE

Published: 2017-12-07

Updated: 2019-10-03

Type: CWE-862

Risk Information

CVSS v2

Base Score: 4.6

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

Impact Score: 6.4

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH