CVE-2017-18190
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.92%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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).
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 2.92% probability · 87th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-290
- Affected
- apple/cups · debian/debian linux · canonical/ubuntu linux
- Source
- cve@mitre.org
EPSS 2.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1048Exploit, Issue Tracking, Third Party Advisory
- https://github.com/apple/cups/commit/afa80cb2b457bf8d64f775bed307588610476c41Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/02/msg00023.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00003.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3577-1/Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1048Exploit, Issue Tracking, Third Party Advisory
- https://github.com/apple/cups/commit/afa80cb2b457bf8d64f775bed307588610476c41Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/02/msg00023.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00003.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3577-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.