The add_job function in scheduler/ipp.c in CUPS before 2.2.6, when D-Bus support is enabled, can be crashed by remote attackers by sending print jobs with an invalid username, related to a D-Bus notification.
https://github.com/apple/cups/commit/49fa4983f25b64ec29d548ffa3b9782426007df3
https://github.com/apple/cups/issues/5143
https://github.com/apple/cups/releases/tag/v2.2.6
https://lists.debian.org/debian-lts-announce/2018/05/msg00018.html
https://lists.debian.org/debian-lts-announce/2018/07/msg00003.html
https://security.cucumberlinux.com/security/details.php?id=346
Source: MITRE
Published: 2018-03-26
Updated: 2018-07-13
Type: CWE-20
Base Score: 3.5
Vector: AV:N/AC:M/Au:S/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 6.8
Severity: LOW
Base Score: 5.3
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 1.6
Severity: MEDIUM