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 Subscribe |
IBM Monitor Component Server applications / Other server solutions |
Vendor | IBM Corporation |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
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
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsIBM Monitor Component: 8.6.2 - 8.7
External linkshttp://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.
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
DescriptionThe 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.
Install update from vendor's website.
Vulnerable software versionsIBM Monitor Component: 8.6.2 - 8.7
External linkshttp://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.