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).
Find out more about CVE-2018-1120 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS3 Base Score | 2.8 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L |
Attack Vector | Local |
Attack Complexity | Low |
Privileges Required | Low |
User Interaction | Required |
Scope | Unchanged |
Confidentiality | None |
Integrity Impact | None |
Availability Impact | Low |
Platform | Errata | Release Date |
---|---|---|
Red Hat Enterprise Linux 7 (kernel-alt) | RHSA-2018:2948 | 2018-10-30 |
Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) | RHSA-2018:3096 | 2018-10-30 |
Red Hat Enterprise Linux 7 (kernel) | RHSA-2018:3083 | 2018-10-30 |
Platform | Package | State |
---|---|---|
Red Hat Enterprise MRG 2 | realtime-kernel | Affected |
Red Hat Enterprise Linux 6 | kernel | Affected |
Red Hat Enterprise Linux 5 | kernel | Will not fix |