Ubuntu.comUB:CVE-2020-26276CVE-2020-26276
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
0.004 Low
EPSS
Percentile
72.3%
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.
References
github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020
github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607
github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx
github.com/mattermost/xml-roundtrip-validator
launchpad.net/bugs/cve/CVE-2020-26276
mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities
nvd.nist.gov/vuln/detail/CVE-2020-26276
security-tracker.debian.org/tracker/CVE-2020-26276
www.cve.org/CVERecord?id=CVE-2020-26276
Related
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
0.004 Low
EPSS
Percentile
72.3%