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CVE-2019-0816

A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic...

5.1 MediumFix available

CVE-2019-0816 is a medium vulnerability (CVSS 5.1) in Canonical Ubuntu Server, published April 9, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.40%, the 72nd percentile. Fixed in cloud-init 18.3-6.

A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
None

Exploit likelihood

1.40%Down 5.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 5.1

A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.

Record
CVE-2019-0816
CVSS 3.0
5.1 MediumCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0
1.9 LowAV:L/AC:M/Au:N/C:N/I:P/A:N
Weakness
CWE-706
Updated
2026-11-02
CVE List No score

A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.

Record
CVE-2019-0816
Updated
2026-11-02
EUVDEUVD-2019-1569 No score

A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.

Record
EUVD-2019-1569
Updated
2026-11-03
GitHub AdvisoriesGHSA-gjp8-2rjx-f9mg 5.1

A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic...

A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.

Record
GHSA-gjp8-2rjx-f9mg
CVSS 3.0
5.1 MediumCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness
CWE-706
Updated
2026-11-02
OSV 5.1

A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.

Record
CVE-2019-0816
CVSS 3.0
5.1 MediumCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2019-0816 5.1

A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.

Record
DEBIAN-CVE-2019-0816
CVSS 3.0
5.1 MediumCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
Show 8 moreShow less
OSVRHBA-2019:1992 5.4

Red Hat Bug Fix Advisory: cloud-init bug fix and enhancement update

Record
RHBA-2019:1992
CVSS 3.0
5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-02
OSVRHSA-2019:0597 5.4

Red Hat Security Advisory: cloud-init security update

Record
RHSA-2019:0597
CVSS 3.0
5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2019-0816 5.1

A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.

Record
UBUNTU-CVE-2019-0816
CVSS 3.0
5.1 MediumCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVopenSUSE-SU-2019:2633-1 No score

Security update for cloud-init

This update for cloud-init to version 19.2 fixes the following issues:

Security issue fixed:

  • CVE-2019-0816: Fixed the unnecessary extra ssh keys that were added to authorized_keys (bsc#1129124).

Non-security issues fixed:

  • Short circuit the conditional for identifying the sysconfig renderer (bsc#1154092, bsc#1142988).
  • If /etc/resolv.conf is a symlink, break it. This will avoid netconfig from clobbering the changes cloud-init applied (bsc#1151488).

This update was imported from the SUSE:SLE-15-SP1:Update update project.

Record
openSUSE-SU-2019:2633-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10688-1 No score

cloud-init-21.2-1.2 on GA media

These are all security issues fixed in the cloud-init-21.2-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10688-1
Updated
2026-11-02
OSVSUSE-SU-2019:3096-1 No score

Security update for cloud-init

This update for cloud-init to version 19.2 fixes the following issues:

Security issue fixed:

  • CVE-2019-0816: Fixed the unnecessary extra ssh keys that were added to authorized_keys (bsc#1129124).

Non-security issues fixed:

  • Short circuit the conditional for identifying the sysconfig renderer (bsc#1154092, bsc#1142988).
  • If /etc/resolv.conf is a symlink, break it. This will avoid netconfig from clobbering the changes cloud-init applied (bsc#1151488).
Record
SUSE-SU-2019:3096-1
Updated
2026-11-02
OSVSUSE-SU-2019:3097-1 No score

Security update for cloud-init

This update for cloud-init to version 19.2 fixes the following issues:

Security issue fixed:

  • CVE-2019-0816: Fixed the unnecessary extra ssh keys that were added to authorized_keys (bsc#1129124).

Non-security issues fixed:

  • Short circuit the conditional for identifying the sysconfig renderer (bsc#1154092, bsc#1142988).
  • If /etc/resolv.conf is a symlink, break it. This will avoid netconfig from clobbering the changes cloud-init applied (bsc#1151488).
Record
SUSE-SU-2019:3097-1
Updated
2026-11-02
OSVSUSE-SU-2019:3191-1 No score

Security update for cloud-init

This update for cloud-init fixes the following issues:

Security issue fixed:

  • CVE-2019-0816: Fixed the unnecessary extra ssh keys that were added to authorized_keys (bsc#1129124).

Non-security issues fixed:

  • Add cloud-init-renderer-detect.patch (bsc#1154092, bsc#1142988)

    • Short curcuit the conditional for identifying the sysconfig renderer. If we find ifup/ifdown accept the renderer as available.

  • Add cloud-init-break-resolv-symlink.patch (bsc#1151488)

    • If /etc/resolv.conf is a symlink break it. This will avoid netconfig from clobbering the changes cloud-init applied.

  • Update to cloud-init 19.2 (bsc#1099358)

    • Remove, included upstream
      • cloud-init-detect-nova.diff
      • cloud-init-add-static-routes.diff
    • net: add rfc3442 (classless static routes) to EphemeralDHCP (LP: #1821102)
    • templates/ntp.conf.debian.tmpl: fix missing newline for pools (LP: #1836598)
    • Support netplan renderer in Arch Linux [Conrad Hoffmann]
    • Fix typo in publicly viewable documentation. [David Medberry]
    • Add a cdrom size checker for OVF ds to ds-identify [Pengpeng Sun] (LP: #1806701)
    • VMWare: Trigger the post customization script via cc_scripts module. [Xiaofeng Wang] (LP: #1833192)
    • Cloud-init analyze module: Added ability to analyze boot events. [Sam Gilson]
    • Update debian eni network configuration location, retain Ubuntu setting [Janos Lenart]
    • net: skip bond interfaces in get_interfaces [Stanislav Makar] (LP: #1812857)
    • Fix a couple of issues raised by a coverity scan
    • Add missing dsname for Hetzner Cloud datasource [Markus Schade]
    • doc: indicate that netplan is default in Ubuntu now
    • azure: add region and AZ properties from imds compute location metadata
    • sysconfig: support more bonding options [Penghui Liao]
    • cloud-init-generator: use libexec path to ds-identify on redhat systems (LP: #1833264)
    • tools/build-on-freebsd: update to python3 [Gon�ri Le Bouder]
    • Allow identification of OpenStack by Asset Tag [Mark T. Voelker] (LP: #1669875)
    • Fix spelling error making 'an Ubuntu' consistent. [Brian Murray]
    • run-container: centos: comment out the repo mirrorlist [Paride Legovini]
    • netplan: update netplan key mappings for gratuitous-arp (LP: #1827238)
    • freebsd: fix the name of cloudcfg VARIANT [Gon�ri Le Bouder]
    • freebsd: ability to grow root file system [Gon�ri Le Bouder]
    • freebsd: NoCloud data source support [Gon�ri Le Bouder] (LP: #1645824)
    • Azure: Return static fallback address as if failed to find endpoint [Jason Zions (MSFT)]

  • Follow up to update cloud-init-trigger-udev.patch (bsc#1144363)

  • Update to version 19.1 (bsc#1136440, bsc#1129124)

Record
SUSE-SU-2019:3191-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
cloud-init
Debian:12
 before 18.3-6
18.3-6
cloud-init
Debian:13
 before 18.3-6
18.3-6
cloud-init
Debian:14
 before 18.3-6
18.3-6
cloud-init
Red Hat:enterprise_linux:8::appstream
 before 0:18.5-1.el8.4
0:18.5-1.el8.4
cloud-init
Red Hat:enterprise_linux:7::server
 before 0:18.2-1.el7_6.2
0:18.2-1.el7_6.2
cloud-init
SUSE:Linux Enterprise Module for Public Cloud 15 SP1
 before 19.2-8.11.1
19.2-8.11.1
cloud-init
SUSE:Linux Enterprise Module for Public Cloud 15
 before 19.2-5.18.1
19.2-5.18.1
cloud-init
SUSE:Linux Enterprise Module for Public Cloud 12
 before 19.2-37.33.1
19.2-37.33.1
cloud-init
Ubuntu:16.04:LTS
 before 18.5-45-g3554ffe8-0ubuntu1~16.04.1, plus listed versions
0.7.7~bzr1149-0ubuntu10.7.7~bzr1154-0ubuntu10.7.7~bzr1155-0ubuntu10.7.7~bzr1156-0ubuntu10.7.7~bzr1156-0ubuntu2
Show 34 moreShow less
0.7.7~bzr1160-0ubuntu10.7.7~bzr1176-0ubuntu10.7.7~bzr1182-0ubuntu10.7.7~bzr1189-0ubuntu10.7.7~bzr1192-0ubuntu10.7.7~bzr1192-0ubuntu20.7.7~bzr1200-0ubuntu10.7.7~bzr1208-0ubuntu10.7.7~bzr1209-0ubuntu10.7.7~bzr1212-0ubuntu10.7.7~bzr1246-0ubuntu1~16.04.10.7.7~bzr1256-0ubuntu1~16.04.10.7.8-1-g3705bb5-0ubuntu1~16.04.10.7.8-1-g3705bb5-0ubuntu1~16.04.30.7.8-49-g9e904bb-0ubuntu1~16.04.10.7.8-49-g9e904bb-0ubuntu1~16.04.20.7.8-49-g9e904bb-0ubuntu1~16.04.30.7.8-49-g9e904bb-0ubuntu1~16.04.40.7.9-0ubuntu1~16.04.20.7.9-48-g1c795b9-0ubuntu1~16.04.10.7.9-90-g61eb03fe-0ubuntu1~16.04.10.7.9-113-g513e99e0-0ubuntu1~16.04.10.7.9-153-g16a7302f-0ubuntu1~16.04.10.7.9-153-g16a7302f-0ubuntu1~16.04.20.7.9-233-ge586fe35-0ubuntu1~16.04.10.7.9-233-ge586fe35-0ubuntu1~16.04.217.1-27-geb292c18-0ubuntu1~16.04.117.1-46-g7acc9e68-0ubuntu1~16.04.117.2-35-gf576b2a2-0ubuntu1~16.04.218.2-4-g05926e48-0ubuntu1~16.04.118.2-4-g05926e48-0ubuntu1~16.04.218.3-9-g2e62cb8a-0ubuntu1~16.04.218.4-0ubuntu1~16.04.218.5-21-g8ee294d5-0ubuntu1~16.04.1
18.5-45-g3554ffe8-0ubuntu1~16.04.1
cloud-init
Ubuntu:18.04:LTS
 before 18.5-45-g3554ffe8-0ubuntu1~18.04.1, plus listed versions
17.1-18-gd4f70470-0ubuntu117.1-25-g17a15f9e-0ubuntu1~17.10.117.1-25-g17a15f9e-0ubuntu117.1-27-geb292c18-0ubuntu117.1-41-g76243487-0ubuntu1
Show 28 moreShow less
17.1-46-g7acc9e68-0ubuntu117.1-51-g05b2308a-0ubuntu117.1-53-ga5dc0f42-0ubuntu117.1-58-g703241a3-0ubuntu117.1-60-ga30a3bb5-0ubuntu117.2-1-g4089e20c-0ubuntu117.2-9-gdf24daa8-0ubuntu117.2-13-g6299e8d0-0ubuntu117.2-20-g32a6a176-0ubuntu117.2-25-gc03bdd3d-0ubuntu117.2-30-gf7deaf15-0ubuntu117.2-34-g644048e3-0ubuntu118.1-0ubuntu118.1-5-g40e77380-0ubuntu118.1-17-g97012fbb-0ubuntu118.1-23-gde34dc7c-0ubuntu118.1-26-g685f9901-0ubuntu118.1-35-ge0f644b7-0ubuntu118.1-35-ge0f644b7-0ubuntu218.2-0ubuntu118.2-4-g05926e48-0ubuntu118.2-4-g05926e48-0ubuntu218.2-9-g49b562c9-0ubuntu118.2-14-g6d48d265-0ubuntu118.2-27-g6ef92c98-0ubuntu1~18.04.118.3-9-g2e62cb8a-0ubuntu1~18.04.218.4-0ubuntu1~18.04.118.5-21-g8ee294d5-0ubuntu1~18.04.1
18.5-45-g3554ffe8-0ubuntu1~18.04.1
cloud-init
openSUSE:Leap 15.1
 before 19.2-lp151.2.9.1
19.2-lp151.2.9.1
cloud-init
openSUSE:Tumbleweed
 before 21.2-1.2
21.2-1.2

History

History
WhenChangedSources
2026-11-03aliases, productsEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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