Vulnerability Name:

CVE-2019-3875 (CCN-162515)

Assigned:2019-03-19
Published:2019-03-19
Updated:2019-10-09
Summary:A vulnerability was found in keycloak before 6.0.2. The X.509 authenticator supports the verification of client certificates through the CRL, where the CRL list can be obtained from the URL provided in the certificate itself (CDP) or through the separately configured path. The CRL are often available over the network through unsecured protocols ('http' or 'ldap') and hence the caller should verify the signature and possibly the certification path. Keycloak currently doesn't validate signatures on CRL, which can result in a possibility of various attacks like man-in-the-middle.
CVSS v3 Severity:4.8 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N)
4.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/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): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-295
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2019-3875

Source: BID
Type: Third Party Advisory, VDB Entry
108748

Source: CCN
Type: Red Hat Bugzilla – Bug 1690628
(CVE-2019-3875) - CVE-2019-3875 keycloak: missing signatures validation on CRL used to verify client certificates

Source: CONFIRM
Type: Issue Tracking, Patch, Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3875

Source: XF
Type: UNKNOWN
keycloak-cve20193875-mitm(162515)

Source: CCN
Type: keycloak GIT Repository
KEYCLOAK-9512 Run x509 tests by default · keycloak/keycloak@996389d · GitHub

Vulnerable Configuration:Configuration 1:
  • cpe:/a:redhat:keycloak:*:*:*:*:*:*:*:* (Version < 6.0.2)
  • OR cpe:/a:redhat:single_sign-on:7.3:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    redhat keycloak *
    redhat single sign-on 7.3