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CVE-2018-1079

Published: 12 April 2018

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.

Notes

AuthorNote
msalvatore
vulnerable code introduced in 0.9.157

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
pcs
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Not vulnerable
(0.9.164-1)
cosmic Ignored
(end of life)
disco Not vulnerable
(0.10.1-2)
eoan Not vulnerable
(0.10.1-2)
trusty Does not exist

upstream
Released (0.9.164-1)
xenial Not vulnerable
(vulnerable code not present)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N