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CVE-2021-39226

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Date: October 5, 2021

Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot "public_mode" configuration setting is set to true (vs default of false), unauthenticated users are able to delete the snapshot with the lowest database key by accessing the literal path: /api/snapshots-delete/:deleteKey. Regardless of the snapshot "public_mode" setting, authenticated users are able to delete the snapshot with the lowest database key by accessing the literal paths: /api/snapshots/:key, or /api/snapshots-delete/:deleteKey. The combination of deletion and viewing enables a complete walk through all snapshot data while resulting in complete snapshot data loss. This issue has been resolved in versions 8.1.6 and 7.5.11. If for some reason you cannot upgrade you can use a reverse proxy or similar to block access to the literal paths: /api/snapshots/:key, /api/snapshots-delete/:deleteKey, /dashboard/snapshot/:key, and /api/snapshots/:key. They have no normal function and can be disabled without side effects.

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Severity Score

Related Resources (20)

https://security.netapp.com/advisory/ntap-20211029-0008/
https://github.com/grafana/grafana
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DCKBFUSY6V4VU5AQUYWKISREZX5NLQJT
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E6ANHRDBXQT6TURLP2THM26ZPDINFBEG/
https://nvd.nist.gov/vuln/detail/CVE-2021-39226
https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-11
https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-11/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DCKBFUSY6V4VU5AQUYWKISREZX5NLQJT/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E6ANHRDBXQT6TURLP2THM26ZPDINFBEG/
https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-1-6
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-39226
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DCKBFUSY6V4VU5AQUYWKISREZX5NLQJT/
https://security.netapp.com/advisory/ntap-20211029-0008
http://www.openwall.com/lists/oss-security/2021/10/05/4
https://access.redhat.com/security/cve/CVE-2021-39226
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E6ANHRDBXQT6TURLP2THM26ZPDINFBEG
https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-1-6/
https://github.com/grafana/grafana/security/advisories/GHSA-69j6-29vr-p3j9
https://github.com/grafana/grafana/commit/2d456a6375855364d098ede379438bf7f0667269
https://www.mend.io/vulnerability-database/CVE-2021-39226

Severity Score

Weakness Type (CWE)

Authentication Issues

CWE-287

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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