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Fencer Vulns
medium 6.5

CVE-2018-16846 json

It was found in Ceph versions before 13.2.4 that authenticated ceph RGW users can cause a denial of service against OMAPs holding bucket in…

published 2019-01-15 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-8642

cvss
6.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

It was found in Ceph versions before 13.2.4 that authenticated ceph RGW users can cause a denial of service against OMAPs holding bucket indices.

Patch / fix

  • redhat ceph 13.2.4
  • ceph Debian 14, Debian 13, Debian 12 12.2.11+dfsg1-1

debian advisories DEBIAN-CVE-2018-16846

  • ceph Ubuntu 16.04 LTS 10.2.11-0ubuntu0.16.04.2
  • ceph Ubuntu 18.04 LTS 12.2.11-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2018-16846

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • ceph ceph storage 3 2:12.2.12-45.el7cp
  • librbd1 ceph storage 3 2:12.2.12-45.el7cp
  • librgw2 ceph storage 3 2:12.2.12-45.el7cp
  • ceph-mds ceph storage 3 2:12.2.12-45.el7cp
  • ceph-mgr ceph storage 3 2:12.2.12-45.el7cp
  • ceph-mon ceph storage 3 2:12.2.12-45.el7cp
  • ceph-osd ceph storage 3 2:12.2.12-45.el7cp
  • ceph-base ceph storage 3 2:12.2.12-45.el7cp

red hat advisories RHSA-2019:2538

  • ceph SLE Module for Basesystem 15 13.2.4.125+gad802694f5-3.7.2
  • ceph SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES 12 SP4 +6 more 12.2.10+git.1549630712.bb089269ea-2.27.2

suse advisories SUSE-SU-2019:0586-1SUSE-SU-2019:0499-1

  • ceph openSUSE Leap 15.0 13.2.4.125+gad802694f5-lp150.2.3.1
  • ceph-test openSUSE Leap 15.0 13.2.4.125+gad802694f5-lp150.2.3.1

opensuse advisories openSUSE-SU-2019:1284-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-16846 updated cvss 6.5

ceph: ListBucket max-keys has no defined limit in the RGW codebase

  • Red Hat Ceph Storage 2 ceph, librbd1, librgw2, ceph-mds, ceph-mon, ceph-osd, +12 more
    affected: no fix planned “Will not fix”
  • Red Hat Ceph Storage 3 for Ubuntu
    fixed: vendor fix RHSA-2019:2541
  • Red Hat Ceph Storage 3.3 MON ceph 12.2.12-45.el7cp, librbd1 12.2.12-45.el7cp, librgw2 12.2.12-45.el7cp, ceph-mgr 12.2.12-45.el7cp, ceph-mon 12.2.12-45.el7cp, ceph-base 12.2.12-45.el7cp, +10 more Red Hat Ceph Storage 3.3 OSD ceph 12.2.12-45.el7cp, librbd1 12.2.12-45.el7cp, librgw2 12.2.12-45.el7cp, ceph-osd 12.2.12-45.el7cp, ceph-base 12.2.12-45.el7cp, ceph-test 12.2.12-45.el7cp, +9 more Red Hat Ceph Storage 3.3 Tools ceph 12.2.12-45.el7cp, libntirpc 1.7.4-1.el7cp, librbd1 12.2.12-45.el7cp, librgw2 12.2.12-45.el7cp, ceph-mds 12.2.12-45.el7cp, cephmetrics 2.0.6-1.el7cp, +21 more
    fixed: vendor fix RHSA-2019:2538
  • Red Hat Enterprise Linux 7 librbd1, librados2, python-rbd, ceph-common, python-rados Red Hat Enterprise Linux 8 librbd1, librados2, libcephfs2, libradosstriper1 Red Hat Virtualization 4 redhat-virtualization-host-image-update
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.14% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Affected products

  • [UNKNOWN] ceph

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.