CVE-2018-1079

Description

pcs before version 0.9.164 and 0.10 is vulnerable to a privilege escalation via authorized user malicious REST call. The REST interface of the pcsd service did not properly sanitize the file name from the /remote/put_file query. If the /etc/booth directory exists, an authenticated attacker with write permissions could create or overwrite arbitrary files with arbitrary data outside of the /etc/booth directory, in the context of the pcsd process.

CVSS Metrics

• v3.0•HIGH•Score: 8.7CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
• v3.0•MEDIUM•Score: 6.5CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
• v2.0•MEDIUM•Score: 4AV:N/AC:L/Au:S/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.41%• Percentile: 61%

Techniques & Countermeasures

• CWE-22•Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

  The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

• CWE-552•Files or Directories Accessible to External Parties

  The product makes files or directories accessible to unauthorized actors, even though they should not be.

Affected Systems

• clusterlabs•pacemaker_command_line_interface

  ≤ 0.9.164 | 0.10

• redhat•enterprise_linux

  7.0 | 7.5

• unspecified•pcs

  pcs 0.9.164 | pcs 0.10

References (2)

• https://access.redhat.com/errata/RHSA-2018:1060
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1079