CVE-2017-18190

moderate-risk
Published 2018-02-16

A localhost.localdomain whitelist entry in valid_host() in scheduler/client.c in CUPS before 2.2.2 allows remote attackers to execute arbitrary IPP commands by sending POST requests to the CUPS daemon in conjunction with DNS rebinding. The localhost.localdomain name is often resolved via a DNS server (neither the OS nor the web browser is responsible for ensuring that localhost.localdomain is 127.0.0.1).

Do I need to act?

-
0.70% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (5)

Affected Vendors

Debian Apple Canonical

References (10)

Exploit https://bugs.chromium.org/p/project-zero/issues/detail?id=1048
Patch https://github.com/apple/cups/commit/afa80cb2b457bf8d64f775bed307588610476c41
Mailing List https://lists.debian.org/debian-lts-announce/2018/02/msg00023.html
Mailing List https://lists.debian.org/debian-lts-announce/2018/07/msg00003.html
Third Party Advisory https://usn.ubuntu.com/3577-1/
Exploit https://bugs.chromium.org/p/project-zero/issues/detail?id=1048
Patch https://github.com/apple/cups/commit/afa80cb2b457bf8d64f775bed307588610476c41
Mailing List https://lists.debian.org/debian-lts-announce/2018/02/msg00023.html
Mailing List https://lists.debian.org/debian-lts-announce/2018/07/msg00003.html
Third Party Advisory https://usn.ubuntu.com/3577-1/
40
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 2/34 · Minimal
Exposure 12/34 · Low