Multiple vulnerabilities in IBM Rational Change



Risk Medium
Patch available YES
Number of vulnerabilities 9
CVE-ID CVE-2022-2191
CVE-2022-2047
CVE-2022-2048
CVE-2021-28169
CVE-2021-34428
CVE-2021-28163
CVE-2021-28164
CVE-2021-34429
CVE-2021-28165
CWE-ID CWE-401
CWE-20
CWE-399
CWE-613
CWE-200
CWE-284
CWE-400
Exploitation vector Network
Public exploit Public exploit code for vulnerability #7 is available.
Public exploit code for vulnerability #8 is available.
Vulnerable software
 Rational Change
Web applications / Other software

Vendor IBM Corporation

Security Bulletin

This security bulletin contains information about 9 vulnerabilities.

1) Memory leak

EUVDB-ID: #VU65832

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-2191

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak when handling incorrect TLS connections. A remote attacker can force the application to leak memory and perform denial of service attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rational Change: 5.3.2.4

CPE2.3 External links

https://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-rational-change-fix-pack-04-for-5-3-2/
https://www.ibm.com/support/pages/node/6825513


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) Input validation error

EUVDB-ID: #VU65831

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-2047

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient validation of user-supplied input when parsing invalid URIs such as http://localhost;/path. A remote attacker can pass specially crafted input to the application and bypass implemented security restrictions, as the Jetty's HttpClient, and Jetty's ProxyServlet / AsyncProxyServlet / AsyncMiddleManServlet will wrongly interpret an authority of such URI as the one with a hostname.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rational Change: 5.3.2.4

CPE2.3 External links

https://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-rational-change-fix-pack-04-for-5-3-2/
https://www.ibm.com/support/pages/node/6825513


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.

3) Resource management error

EUVDB-ID: #VU65830

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-2048

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 when handling invalid HTTP/2 requests. A remote attacker can send specially crafted requests to the server and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rational Change: 5.3.2.4

CPE2.3 External links

https://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-rational-change-fix-pack-04-for-5-3-2/
https://www.ibm.com/support/pages/node/6825513


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) Input validation error

EUVDB-ID: #VU53973

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-28169

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information..

The vulnerability exists due to a double decoding issue when parsing URI with certain characters. A remote attacker can send requests to the ConcatServlet and WelcomeFilter and view contents of protected resources within the WEB-INF directory.

Example:

/concat?/%2557EB-INF/web.xml

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rational Change: 5.3.2.4

CPE2.3 External links

https://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-rational-change-fix-pack-04-for-5-3-2/
https://www.ibm.com/support/pages/node/6825513


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) Insufficient Session Expiration

EUVDB-ID: #VU55642

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-34428

CWE-ID: CWE-613 - Insufficient Session Expiration

Exploit availability: No

Description

The vulnerability allows an attacker to gain access to sensitive information.

The vulnerability exists due to insufficient session expiration issue. If an exception is thrown from the SessionListener#sessionDestroyed() method, then the session ID is not invalidated in the session ID manager. On deployments with clustered sessions and multiple contexts this can result in a session not being invalidated.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rational Change: 5.3.2.4

CPE2.3 External links

https://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-rational-change-fix-pack-04-for-5-3-2/
https://www.ibm.com/support/pages/node/6825513


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

6) Information disclosure

EUVDB-ID: #VU51878

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-28163

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. If the ${jetty.base} directory or the ${jetty.base}/webapps directory is a symlink, the contents of the ${jetty.base}/webapps directory may be deployed as a static web application, exposing the content of the directory for download.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rational Change: 5.3.2.4

CPE2.3 External links

https://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-rational-change-fix-pack-04-for-5-3-2/
https://www.ibm.com/support/pages/node/6825513


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.

7) Input validation error

EUVDB-ID: #VU51877

Risk: Medium

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2021-28164

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to gain access to sensitive informatoin.

The vulnerability exists due to insufficient validation of user-supplied input when processing special characters, passed via URI. A remote attacker can use %2e or %2e%2e segments to access protected resources within the WEB-INF directory.

Example:

http://[host]/context/%2e/WEB-INF/web.xml

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rational Change: 5.3.2.4

CPE2.3 External links

https://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-rational-change-fix-pack-04-for-5-3-2/
https://www.ibm.com/support/pages/node/6825513


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. However, a fully functional exploit for this vulnerability is available.

8) Improper access control

EUVDB-ID: #VU56964

Risk: Medium

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2021-34429

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper input validation when processing certain characters in URI. A remote attacker can send a specially crafted HTTP request with encoded characters in URI, bypass implemented security restrictions and access content of the WEB-INF directory.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rational Change: 5.3.2.4

CPE2.3 External links

https://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-rational-change-fix-pack-04-for-5-3-2/
https://www.ibm.com/support/pages/node/6825513


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. However, a fully functional exploit for this vulnerability is available.

9) Resource exhaustion

EUVDB-ID: #VU51876

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-28165

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when processing large TLS frames. A remote attacker can send specially crafted data to the server, trigger CPU high load and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rational Change: 5.3.2.4

CPE2.3 External links

https://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-rational-change-fix-pack-04-for-5-3-2/
https://www.ibm.com/support/pages/node/6825513


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.



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