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redhatRedHatRHSA-2017:0876
HistoryApr 04, 2017 - 5:13 p.m.

(RHSA-2017:0876) Moderate: Red Hat Single Sign-On 7.1 update

2017-04-0417:13:48
access.redhat.com
13

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

5.5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:P/A:P

0.011 Low

EPSS

Percentile

83.8%

Red Hat Single Sign-On is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.

This release of Red Hat Single Sign-On 7.1 serves as a replacement for Red Hat Single Sign-On 7.0, and includes several bug fixes and enhancements. For further information, refer to the Release Notes linked to in the References section.

Security Fix(es):

  • It was found that keycloak did not correctly check permissions when handling service account user deletion requests sent to the REST server. An attacker with service account authentication could use this flaw to bypass normal permissions and delete users in a separate realm. (CVE-2016-8629)

  • It was found that JBoss EAP 7 Header Cache was inefficient. An attacker could use this flaw to cause a denial of service attack. (CVE-2016-9589)

  • It was found that keycloak’s implementation of HMAC verification for JWS tokens uses a method that runs in non-constant time, potentially leaving the application vulnerable to timing attacks. (CVE-2017-2585)

Red Hat would like to thank Gabriel Lavoie (Halogen Software) for reporting CVE-2016-9589 and Richard Kettelerij (Mindloops) for reporting CVE-2017-2585.

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

5.5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:P/A:P

0.011 Low

EPSS

Percentile

83.8%

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