Multiple vulnerabilities in IBM i Modernization Engine for Lifecycle Integration

1) Authentication Bypass by Spoofing

EUVDB-ID: #VU77767

Risk: Medium

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

CVE-ID: CVE-2023-2585

CWE-ID: CWE-290 - Authentication Bypass by Spoofing

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error within the Keycloak Device Authorisation Grant. A remote attacker can spoof parts of the device flow and use a device_code to retrieve an access token for other OAuth clients.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM i Modernization Engine for Lifecycle Integration: before 1.4.4

External links

http://www.ibm.com/support/pages/node/7029748

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

2) Insecure Temporary File

EUVDB-ID: #VU72075

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-0482

CWE-ID: CWE-377 - Insecure Temporary File

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to insecure creation of temporary files. A local user can gain access to sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM i Modernization Engine for Lifecycle Integration: before 1.4.4

External links

http://www.ibm.com/support/pages/node/7029748

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

3) Resource management error

EUVDB-ID: #VU76427

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-20883

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources within the application. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Specifically, an application is vulnerable if all of the conditions are true:

• The application has Spring MVC auto-configuration enabled. This is the case by default if Spring MVC is on the classpath.
• The application makes use of Spring Boot's welcome page support, either static or templated.
• Your application is deployed behind a proxy which caches 404 responses.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM i Modernization Engine for Lifecycle Integration: before 1.4.4

External links

http://www.ibm.com/support/pages/node/7029748

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

4) Improper Certificate Validation

EUVDB-ID: #VU77752

Risk: Medium

CVSSv3.1: 4.2 [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]

CVE-ID: CVE-2023-1664

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass client certificate validation.

The vulnerability exists due to improper certificate validation when using X509 Client Certificate Authenticatior with the option "Revalidate Client Certificate". A remote attacker with ability to directly connect to Keycloak (e.g. not via the reverse proxy) can bypass certificate validation and gain unauthorized access to the application.

Successful exploitation of the vulnerability requires that there's a configuration error in KC_SPI_TRUSTSTORE_FILE_FILE, which results in accepting any certificate with the logging information of "Cannot validate client certificate trust: Truststore not available".

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM i Modernization Engine for Lifecycle Integration: before 1.4.4

External links

http://www.ibm.com/support/pages/node/7029748

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

5) Deserialization of Untrusted Data

EUVDB-ID: #VU76601

Risk: High

CVSSv3.1: 8.5 [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]

CVE-ID: CVE-2016-1000027

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM i Modernization Engine for Lifecycle Integration: before 1.4.4

External links

http://www.ibm.com/support/pages/node/7029748

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

6) Information disclosure

EUVDB-ID: #VU70797

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-45787

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to improper laxist permissions on the temporary files. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM i Modernization Engine for Lifecycle Integration: before 1.4.4

External links

http://www.ibm.com/support/pages/node/7029748

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

7) Incorrect default permissions

EUVDB-ID: #VU77107

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-2976

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions in com.google.common.io.FileBackedOutputStream. A local user with access to the system can view contents of files and directories or modify them.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM i Modernization Engine for Lifecycle Integration: before 1.4.4

External links

http://www.ibm.com/support/pages/node/7029748

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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