Multiple vulnerabilities in IBM Monitor Component



Published: 2022-03-20
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-33503
CVE-2021-28363
CWE-ID CWE-400
CWE-297
Exploitation vector Network
Public exploit N/A
Vulnerable software
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IBM Monitor Component
Server applications / Other server solutions

Vendor IBM Corporation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU54077

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-2021-33503

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 improper input validation in urllib3 when processing URL with multiple "@" characters in the authority component. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Monitor Component: 8.6.2 - 8.7

External links

http://www.ibm.com/blogs/psirt/security-bulletin-urllib-upgrade-cve-2021-33503-cve-2021-28363/
http://www.ibm.com/support/pages/node/6564723


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) Improper validation of certificate with host mismatch

EUVDB-ID: #VU51604

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-2021-28363

CWE-ID: CWE-297 - Improper Validation of Certificate with Host Mismatch

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to urllib3 library for Python omits SSL certificate validation in some cases involving HTTPS to HTTPS proxies. The initial connection to the HTTPS proxy (if an SSLContext isn't given via proxy_config) doesn't verify the hostname of the certificate. This means certificates for different servers that still validate properly with the default urllib3 SSLContext will be silently accepted. A remote attacker can supply a valid SSL certificate for a different hostname and perform Man-in-the-Middle (MitM) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Monitor Component: 8.6.2 - 8.7

External links

http://www.ibm.com/blogs/psirt/security-bulletin-urllib-upgrade-cve-2021-33503-cve-2021-28363/
http://www.ibm.com/support/pages/node/6564723


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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