CVE-2017-17450 Information

Description

net/netfilter/xt_osf.c in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for add_callback and remove_callback operations which allows local users to bypass intended access restrictions because the xt_osf_fingers data structure is shared across all net namespaces.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html http://www.securityfocus.com/bid/102110 https://lkml.org/lkml/2017/12/5/982 https://usn.ubuntu.com/3583-1/ https://usn.ubuntu.com/3583-2/ 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/3632-1/ https://www.debian.org/security/2017/dsa-4073 https://www.debian.org/security/2018/dsa-4082

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8