Vulnerability Name:

CVE-2020-27846 (CCN-193628)

Assigned:2020-12-17
Published:2020-12-17
Updated:2021-03-31
Summary:A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
CVSS v3 Severity:9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
9.8 Critical (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:10.0 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-115
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2020-27846

Source: CCN
Type: Red Hat Bugzilla – Bug 1907670
(CVE-2020-27846) - CVE-2020-27846 crewjam/saml: authentication bypass in saml authentication

Source: MISC
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1907670

Source: XF
Type: UNKNOWN
crewjamsaml-cve202027846-sec-bypass(193628)

Source: CCN
Type: saml GIT Repository
Merge pull request from GHSA-4hq8-gmxx-h6w9

Source: MISC
Type: Third Party Advisory
https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9

Source: MISC
Type: Vendor Advisory
https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-968067abfa

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-64e54abd9f

Source: MISC
Type: Exploit, Third Party Advisory
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/

Source: CONFIRM
Type: Third Party Advisory
https://security.netapp.com/advisory/ntap-20210205-0002/

Vulnerable Configuration:Configuration 1:
  • cpe:/a:grafana:grafana:*:*:*:*:enterprise:*:*:* (Version < 6.7.5)
  • OR cpe:/a:grafana:grafana:*:*:*:*:enterprise:*:*:* (Version >= 7.0.0 and < 7.2.3)
  • OR cpe:/a:grafana:grafana:*:*:*:*:enterprise:*:*:* (Version >= 7.3.0 and < 7.3.6)

  • Configuration 2:
  • cpe:/a:saml_project:saml:*:*:*:*:*:*:*:* (Version < 0.4.3)

  • Configuration 3:
  • cpe:/a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*
  • OR cpe:/a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
  • OR cpe:/a:redhat:openshift_service_mesh:2.0:*:*:*:*:*:*:*
  • OR cpe:/o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*

  • Configuration 4:
  • cpe:/o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*

  • Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

  • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.redhat.rhsa:def:20211859
    P
    RHSA-2021:1859: grafana security, bug fix, and enhancement update (Moderate)
    2021-05-18
    BACK
    grafana grafana *
    grafana grafana *
    grafana grafana *
    saml_project saml *
    redhat openshift container platform 3.11
    redhat openshift container platform 4.0
    redhat openshift service mesh 2.0
    redhat enterprise linux 8.0
    fedoraproject fedora 32
    fedoraproject fedora 33