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CVE-2020-1759

18
FAUCET Score

CVE-2020-1759 is a nonce reuse vulnerability in the secure mode of the messenger v2 protocol affecting Red Hat Ceph Storage 4 and Red Hat OpenShift Container Storage 4.2. This flaw allows an attacker to forge authentication tags and potentially manipulate data due to the reuse of a nonce within a session, compromising confidentiality and integrity. Rated 6.8 MEDIUM, exploitation requires high attack complexity and user interaction, but could lead to high impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:redhat:ceph_storage:4.0:*:*:*:*:*:*:*
4.2CPE matchmatch criteria
cpe:2.3:a:redhat:openshift:4.2:*:*:*:*:*:*:*
15CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:15:*:*:*:*:*:*:*
< 14.2.21CPE matchmatch criteria
cpe:2.3:a:linuxfoundation:ceph:*:*:*:*:*:*:*:*
31CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.4MEDIUM

CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.58%
Probability of exploitation in next 30 days
EPSS Percentile
73.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0158 is in the 82nd percentile among its peer group of 704 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.2 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Ceph Storage 4.1Fixed in: ceph-2:14.2.8-111.el7cp
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Ceph Storage 4.1Fixed in: ceph-ansible-0:4.0.31-1.el7cp
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenStack Platform 15 (Stein)Fixed in: ceph
redhatend of lifevia redhat_api
Product: Red Hat Openshift Container Storage 4Fixed in: ceph

Vendor Advisories (1)

redhatCVE-2020-1759Moderate

ceph: secure mode of msgr2 breaks both confidentiality and integrity aspects for long-lived sessions

Apr 6, 2020

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchVendor Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/P3A2UFR5IUIEXJUCF64GQ5OVLCZGODXE
security.gentoo.org / glsa/202105-39
Third Party Advisory