CVE-2018-1120 Information

Description

A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a process’s memory containing command line arguments (or environment strings) an attacker can cause utilities from psutils or procps (such as ps w) or any other program which makes a read() call to the /proc/pid/cmdline (or /proc/pid/environ) files to block indefinitely (denial of service) or for some controlled time (as a synchronization primitive for other attacks).

CVSS Vector

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

Reference

http://seclists.org/oss-sec/2018/q2/122 http://www.securityfocus.com/bid/104229 https://access.redhat.com/errata/RHSA-2018:2948 https://access.redhat.com/errata/RHSA-2018:3083 https://access.redhat.com/errata/RHSA-2018:3096 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1120 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7f7ccc2ccc2e70c6054685f5e3522efa81556830 https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html https://security.gentoo.org/glsa/201805-14 https://usn.ubuntu.com/3752-1/ https://usn.ubuntu.com/3752-2/ https://usn.ubuntu.com/3752-3/ https://usn.ubuntu.com/3910-1/ https://usn.ubuntu.com/3910-2/ https://www.exploit-db.com/exploits/44806/

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.3