Multiple vulnerabilities in Red Hat Single Sign-On 7.6

1) Resource exhaustion

EUVDB-ID: #VU81728

Risk: High

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:H/RL:O/RC:C]

CVE-ID: CVE-2023-44487

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improperly control of consumption for internal resources when handling HTTP/2 requests with compressed HEADERS frames. A remote attacker can send a sequence of compressed HEADERS frames followed by RST_STREAM frames and perform a denial of service (DoS) attack, a.k.a. "Rapid Reset".

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Single Sign-On: 7.6.0 - 7.6.5

CPE2.3

• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.6.2:*:*:*:*:*:*:*

External links

http://access.redhat.com/errata/RHSA-2023:7486
http://access.redhat.com/errata/RHSA-2023:7488

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?

Yes. This vulnerability is being exploited in the wild.

2) LDAP injection

EUVDB-ID: #VU78328

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-33201

CWE-ID: CWE-90 - Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to improper input validation in applications that use an LDAP CertStore from Bouncy Castle to validate X.509 certificates. During the certificate validation process, Bouncy Castle inserts the certificate's Subject Name into an LDAP search filter without any escaping, which leads to an LDAP injection vulnerability. A remote non-authenticated attacker can use a specially crafted X.509 certificate to bypass authentication process and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Single Sign-On: 7.6.0 - 7.6.5

CPE2.3

• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.6.2:*:*:*:*:*:*:*

External links

http://access.redhat.com/errata/RHSA-2023:7486
http://access.redhat.com/errata/RHSA-2023:7488

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) Improper enforcement of behavioral workflow

EUVDB-ID: #VU78469

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-0105

CWE-ID: CWE-841 - Improper Enforcement of Behavioral Workflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to lock out other users.

The vulnerability exists due to incorrect handling of email trust, caused by handling of the verified account state when changing the email address. A remote attacker can lock our or impersonate other users.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Single Sign-On: 7.6.0 - 7.6.5

CPE2.3

• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_single_sign-on:7.6.2:*:*:*:*:*:*:*

External links

http://access.redhat.com/errata/RHSA-2023:7486
http://access.redhat.com/errata/RHSA-2023:7488

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.