Red Hat update for keycloak

1) Information disclosure

EUVDB-ID: #VU16027

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-10894

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to SAML authentication incorrectly authenticated expired certificates. A remote attacker can supply specially crafted certificates and gain access to potentially sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Red Hat Single Sign-On: 7.2

CPE2.3

• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.2:*:*:*:*:*:*:

External links

http://access.redhat.com/errata/RHSA-2018:3593

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Cross-site scripting

EUVDB-ID: #VU16028

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-14655

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when using 'response_mode=form_post' it is possible to inject arbitrary Javascript-Code via the 'state'-parameter in the authentication URL. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Red Hat Single Sign-On: 7.2

CPE2.3

• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.2:*:*:*:*:*:*:

External links

http://access.redhat.com/errata/RHSA-2018:3593

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Brute-force attack

EUVDB-ID: #VU16029

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-14657

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows remote attacker to perform brute-force attack on the target system.

The vulnerability exists due to improper implementation of the Brute Force detection algorithm doesn't enforce its protection measures when TOPT enabled. A remote attacker can perform a brute force attack, bypass authentication and gain access to device functions.

Successful exploitation of this vulnerability may result in unauthorized access to the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Red Hat Single Sign-On: 7.2

CPE2.3

• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.2:*:*:*:*:*:*:

External links

http://access.redhat.com/errata/RHSA-2018:3593

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Open redirect

EUVDB-ID: #VU16030

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-14658

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated attacker to redirect the target user to external websites.

The weakness exists due to the Redirect URL for both Login and Logout are not normalized in org.keycloak.protocol.oidc.utils.RedirectUtils before the redirect url is verified. A remote attacker can trick the victim into visiting a specially crafted website and redirect users to malicious website.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Red Hat Single Sign-On: 7.2

CPE2.3

• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.2:*:*:*:*:*:*:

External links

http://access.redhat.com/errata/RHSA-2018:3593

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.