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CVE-2019-0816

20
FAUCET Score

CVE-2019-0816 is a security feature bypass vulnerability in Azure SSH Keypairs, affecting Canonical Azure, Canonical Ubuntu Linux, Microsoft Azure, and Microsoft Ubuntu Linux. This flaw stems from a change in the provisioning logic for certain Linux images utilizing cloud-init. Rated as Medium severity (CVSS 5.1), it has a local attack vector with high attack complexity, allowing for a high impact on integrity without affecting confidentiality or availability. There is no evidence of active exploitation, nor are there known public exploits or Metasploit modules, and community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.1MEDIUM

CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.4
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.40%
Probability of exploitation in next 30 days
EPSS Percentile
69.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0140 is in the 93rd percentile among its peer group of 1,595 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

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

Remediation

Patch Available

Vendor Patches (4)

microsoftpatch availablevia msrc
Product: UbuntuServer:18.04-LTS
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: cloud-init-0:18.2-1.el7_6.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: cloud-init-0:18.5-1.el8.4
View patch
microsoftvendor investigatingvia nvd_reference
View patch

Vendor Advisories (2)

microsoft2019-Mar/CVE-2019-0816Moderate

Azure SSH Keypairs Security Feature Bypass Vulnerability

Mar 12, 2019
redhatCVE-2019-0816Moderate

cloud-init: extra ssh keys added to authorized_keys on the Azure platform

Mar 5, 2019

References

lists.opensuse.org / opensuse-security-announce/2019-12/msg00018.html
portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2019-0816
Vendor Advisory