CVE-2017-15649

MEDIUM

Description

net/packet/af_packet.c in the Linux kernel before 4.13.6 allows local users to gain privileges via crafted system calls that trigger mishandling of packet_fanout data structures, because of a race condition (involving fanout_add and packet_do_bind) that leads to a use-after-free, a different vulnerability than CVE-2017-6346.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=008ba2a13f2d04c947adc536d19debb8fe66f110

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4971613c1639d8e5f102c4e797c3bf8f83a5a69e

http://patchwork.ozlabs.org/patch/813945/

http://patchwork.ozlabs.org/patch/818726/

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6

http://www.securityfocus.com/bid/101573

https://access.redhat.com/errata/RHSA-2018:0151

https://access.redhat.com/errata/RHSA-2018:0152

https://access.redhat.com/errata/RHSA-2018:0181

https://blogs.securiteam.com/index.php/archives/3484

https://github.com/torvalds/linux/commit/008ba2a13f2d04c947adc536d19debb8fe66f110

https://github.com/torvalds/linux/commit/4971613c1639d8e5f102c4e797c3bf8f83a5a69e

https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html

https://usn.ubuntu.com/3754-1/

Details

Source: MITRE

Published: 2017-10-19

Updated: 2018-08-24

Type: CWE-362

Risk Information

CVSS v2.0

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 v3.0

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