CVE-2018-1120

Advisory lineage Upstream: 0 Downstream: 21
Modified
Published: 20 Jun 2018, 13:00
Last modified:05 Aug 2024, 03:51

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
5.3 MEDIUM
v3.0 (nvd)
EPSS Score
1.44% LOW
1% probability +0.45%
KEV
Not listed
Ransomware
No reports
Public exploits
2 found
Dark Web
Not detected

Timeline

20 Jun 2018, 13:00
Published
Vulnerability first disclosed
05 Aug 2024, 03:51
Last Modified
Vulnerability information updated

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 Metrics

  • v3.0•LOW•Score: 2.8CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
  • v3.0•MEDIUM•Score: 5.3CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•LOW•Score: 3.5AV:N/AC:M/Au:S/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 1.44%• Percentile: 81%

Techniques & Countermeasures

  • CWE-119•Improper Restriction of Operations within the Bounds of a Memory Buffer

    The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

  • CWE-122•Heap-based Buffer Overflow

    A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Affected Systems

  • canonical•ubuntu_linux

    16.04 | 18.04

  • debian•debian_linux

    8.0

  • linux•linux_kernel

    < 4.17

  • redhat•enterprise_linux_desktop

    7.0

  • redhat•enterprise_linux_server

    7.0

  • redhat•enterprise_linux_workstation

    7.0

  • redhat•virtualization_host

    4.0

  • [unknown]•kernel

    kernel 4.17

References (15)