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Fencer Intel
high 7.1

CVE-2020-27781 json

User credentials can be manipulated and stolen by Native CephFS consumers of OpenStack Manila, resulting in potential privilege escalation.

published 5y ago modified 4mo ago also EUVD-2020-20285

cvss
7.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

User credentials can be manipulated and stolen by Native CephFS consumers of OpenStack Manila, resulting in potential privilege escalation. An Open Stack Manila user can request access to a share to an arbitrary cephx user, including existing users. The access key is retrieved via the interface drivers. Then, all users of the requesting OpenStack project can view the access key. This enables the attacker to target any resource that the user has access to. This can be done to even "admin" users, compromising the ceph administrator. This flaw affects Ceph versions prior to 14.2.16, 15.x prior to 15.2.8, and 16.x prior to 16.2.0.

Patch / fix

  • redhat ceph 14.2.16, 15.2.8, 16.2.0
  • ceph Debian 14, Debian 13, Debian 12 14.2.16-1

debian advisories DEBIAN-CVE-2020-27781

  • ceph Ubuntu 18.04 LTS 12.2.13-0ubuntu0.18.04.10
  • ceph Ubuntu 20.04 LTS 15.2.12-0ubuntu0.20.04.1

ubuntu advisories UBUNTU-CVE-2020-27781

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 4 2:14.2.11-95.el7cp
  • ceph ceph storage 4 2:14.2.11-95.el8cp
  • librbd1 ceph storage 4 2:14.2.11-95.el7cp
  • librbd1 ceph storage 4 2:14.2.11-95.el8cp
  • librgw2 ceph storage 4 2:14.2.11-95.el7cp
  • librgw2 ceph storage 4 2:14.2.11-95.el8cp
  • rbd-nbd ceph storage 4 2:14.2.11-95.el7cp
  • rbd-nbd ceph storage 4 2:14.2.11-95.el8cp

red hat advisories RHSA-2021:0081RHSA-2021:1518

  • ceph SLE Module for Basesystem 15 SP1, Enterprise Storage 6 14.2.16.402+g7d47dbaf4d-3.57.1
  • ceph SLE Module for Basesystem 15 SP2, Enterprise Storage 7 15.2.8.80+g1f4b6229ca-3.13.1

suse advisories SUSE-SU-2021:0023-1SUSE-SU-2020:3895-1

  • ceph openSUSE Tumbleweed 16.2.6.463+g22e7612f9ad-1.1
  • ceph openSUSE Leap 15.1 14.2.16.402+g7d47dbaf4d-lp151.2.31.1
  • ceph-test openSUSE Leap 15.1 14.2.16.402+g7d47dbaf4d-lp151.2.31.1
  • ceph openSUSE Leap 15.2 15.2.8.80+g1f4b6229ca-lp152.2.9.1
  • ceph-test openSUSE Leap 15.2 15.2.8.80+g1f4b6229ca-lp152.2.9.1

opensuse advisories openSUSE-SU-2024:11652-1openSUSE-SU-2021:0079-1openSUSE-SU-2020:2327-1

  • ceph Alpine 3.12, Alpine 3.11 14.2.19-r0
  • ceph Alpine 3.16, Alpine 3.15, Alpine 3.14 +1 more 15.2.8-r0
  • ceph16 Alpine 3.18, Alpine 3.17 15.2.8-r0

alpine advisories ALPINE-CVE-2020-27781

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2020-27781 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2020-27781 updated cvss 7.1

ceph: User credentials can be manipulated and stolen by Native CephFS consumers of OpenStack Manila

  • Red Hat Ceph Storage 2 ceph, librbd1, librgw2, ceph-mds, ceph-mon, ceph-osd, +12 more
    affected: no fix planned “Out of support scope”
  • Red Hat Openshift Container Storage 4 ceph Red Hat OpenStack Platform 13 (Queens) librbd1, librgw2, ceph-fuse, librados2, libcephfs2, python-rbd, +6 more
    affected: no fix planned “Will not fix”
  • Red Hat Ceph Storage 3 MON - ELS ceph 12.2.12-139.el7cp, librbd1 12.2.12-139.el7cp, librgw2 12.2.12-139.el7cp, ceph-mgr 12.2.12-139.el7cp, ceph-mon 12.2.12-139.el7cp, ceph-base 12.2.12-139.el7cp, +10 more Red Hat Ceph Storage 3 OSD - ELS ceph 12.2.12-139.el7cp, librbd1 12.2.12-139.el7cp, librgw2 12.2.12-139.el7cp, ceph-osd 12.2.12-139.el7cp, ceph-base 12.2.12-139.el7cp, ceph-test 12.2.12-139.el7cp, +9 more Red Hat Ceph Storage 3 Tools - ELS grafana 5.2.4-3.el7cp, ceph 12.2.12-139.el7cp, librbd1 12.2.12-139.el7cp, librgw2 12.2.12-139.el7cp, tcmu-runner 1.4.0-3.el7cp, ceph-mds 12.2.12-139.el7cp, +16 more
    fixed: vendor fix RHSA-2021:1518
  • Red Hat Ceph Storage 4.2 MON ceph 14.2.11-95.el7cp, ceph 14.2.11-95.el8cp, librbd1 14.2.11-95.el7cp, librbd1 14.2.11-95.el8cp, librgw2 14.2.11-95.el7cp, librgw2 14.2.11-95.el8cp, +38 more Red Hat Ceph Storage 4.2 OSD ceph 14.2.11-95.el7cp, ceph 14.2.11-95.el8cp, librbd1 14.2.11-95.el7cp, librbd1 14.2.11-95.el8cp, librgw2 14.2.11-95.el7cp, librgw2 14.2.11-95.el8cp, +26 more Red Hat Ceph Storage 4.2 Tools ceph 14.2.11-95.el7cp, ceph 14.2.11-95.el8cp, librbd1 14.2.11-95.el7cp, librbd1 14.2.11-95.el8cp, librgw2 14.2.11-95.el7cp, librgw2 14.2.11-95.el8cp, +34 more
    fixed: vendor fix RHSA-2021:0081
  • Red Hat OpenShift Container Storage 4.6 on RHEL-8 ocs4/ocs-operator-bundle 4.6.2-1, ocs4/mcg-core-rhel8 5.6.0-42.6a01c5fc0.5.6, ocs4/mcg-rhel8-operator 5.6.0-41.2279a46.5.6, ocs4/cephcsi-rhel8 4.6-54.49cf5efdd.release_4.6, ocs4/ocs-rhel8-operator 4.6-78.3b7455e4.release_4.6, ocs4/ocs-must-gather-rhel8 4.6-78.3b7455e4.release_4.6, +1 more
    fixed: vendor fix RHBA-2021:0305
  • Red Hat Ceph Storage 4.2 MON python-repoze-lru 0.7-8.el7cp, python-repoze-lru 0.7-6.el8ost, python2-repoze-lru 0.7-8.el7cp, python3-repoze-lru 0.7-6.el8ost Red Hat Ceph Storage 4.2 Tools libntirpc 3.3-0.1.el7cp, libntirpc 3.3-0.1.el8cp, nfs-ganesha 3.3-0.4.el7cp, nfs-ganesha 3.3-0.4.el8cp, ceph-ansible 4.0.41-1.el7cp, ceph-ansible 4.0.41-1.el8cp, +17 more Red Hat Enterprise Linux 8 librbd1, librados2, libcephfs2, libradosstriper1 Red Hat Enterprise Linux 9 librbd1, librados2
    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

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD 2.0 3.6 AV:L/AC:L/Au:N/C:P/I:P/A:N

Affected products

  • n/a Ceph

Classification

Weakness
  • CWE-522 Insufficiently Protected Credentials

References

Sources

Fencer Intel 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.