CVE-2020-26276
Fleet SAML XML Parsing Authentication Bypass
Description
Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go's standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet.
INFO
Published Date :
Dec. 17, 2020, 8:15 p.m.
Last Modified :
Dec. 18, 2020, 7:11 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
6.0
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-26276.
| URL | Resource |
|---|---|
| https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020 | Release Notes Third Party Advisory |
| https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607 | Patch Third Party Advisory |
| https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx | Third Party Advisory |
| https://github.com/mattermost/xml-roundtrip-validator | Third Party Advisory |
| https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities | Not Applicable Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-26276 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-26276 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Dec. 18, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020 No Types Assigned https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020 Release Notes, Third Party Advisory Changed Reference Type https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607 No Types Assigned https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607 Patch, Third Party Advisory Changed Reference Type https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx No Types Assigned https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx Third Party Advisory Changed Reference Type https://github.com/mattermost/xml-roundtrip-validator No Types Assigned https://github.com/mattermost/xml-roundtrip-validator Third Party Advisory Changed Reference Type https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities No Types Assigned https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities Not Applicable, Third Party Advisory Added CWE NIST CWE-290 Added CPE Configuration OR *cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:* versions up to (excluding) 3.5.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-26276 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-26276
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.43 }} 0.07%
score
0.74780
percentile