CVE-2017-18017 Information

Description

The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11 and 4.9.x before 4.9.36 allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.

CVSS Vector

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

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2638fd0f92d4397884fd991d8f4925cb3f081901 http://patchwork.ozlabs.org/patch/746618/ http://www.securityfocus.com/bid/102367 https://access.redhat.com/errata/RHSA-2018:0676 https://access.redhat.com/errata/RHSA-2018:1062 https://access.redhat.com/errata/RHSA-2018:1130 https://access.redhat.com/errata/RHSA-2018:1170 https://access.redhat.com/errata/RHSA-2018:1319 https://access.redhat.com/errata/RHSA-2018:1737 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1739765 https://github.com/torvalds/linux/commit/2638fd0f92d4397884fd991d8f4925cb3f081901 https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0 https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html https://lkml.org/lkml/2017/4/2/13 https://usn.ubuntu.com/3583-1/ https://usn.ubuntu.com/3583-2/ https://www.debian.org/security/2018/dsa-4187 https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.36

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8