CVE-2017-15129 Information

Description

A use-after-free vulnerability was found in network namespaces code affecting the Linux kernel before 4.14.11. The function get_net_ns_by_id() in net/core/net_namespace.c does not check for the net::count value after it has found a peer network in netns_ids idr which could lead to double free and memory corruption. This vulnerability could allow an unprivileged local user to induce kernel memory corruption on the system leading to a crash. Due to the nature of the flaw privilege escalation cannot be fully ruled out although it is thought to be unlikely.

CVSS Vector

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

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=21b5944350052d2583e82dd59b19a9ba94a007f0 http://seclists.org/oss-sec/2018/q1/7 http://www.securityfocus.com/bid/102485 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://access.redhat.com/errata/RHSA-2019:1946 https://access.redhat.com/security/cve/CVE-2017-15129 https://bugzilla.redhat.com/show_bug.cgi?id=1531174 https://github.com/torvalds/linux/commit/21b5944350052d2583e82dd59b19a9ba94a007f0 https://marc.info/?l=linux-netdev&m=151370451121029&w=2 https://marc.info/?t=151370468900001&r=1&w=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.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5