Multiple vulnerabilities in IBM MQ



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2023-23916
CVE-2023-27535
CWE-ID CWE-770
CWE-371
Exploitation vector Network
Public exploit N/A
Vulnerable software
 IBM MQ
Server applications / Other server solutions

Vendor IBM Corporation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Allocation of Resources Without Limits or Throttling

EUVDB-ID: #VU72337

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-2023-23916

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

Exploit availability: No

Description

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

The vulnerability exists due to incorrect implementation of the "chained" HTTP compression algorithms, where the number of links in the decompression chain was limited for each header instead of the entire request. A remote attacker can send a specially crafted compressed HTTP request with numerous headers and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM MQ: 9.0.0.14 - 9.3.2.0

CPE2.3 External links

https://www.ibm.com/support/pages/node/6986579


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) State Issues

EUVDB-ID: #VU73828

Risk: Low

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

CVE-ID: CVE-2023-27535

CWE-ID: CWE-371 - State Issues

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to FTP server.

The vulnerability exists due to cURL will reuse a previously created FTP connection even when one or more options had been changed that could have made the effective user a very different one. A remote attacker can connect to the FTP server using credentials supplied by another user and gain access to otherwise restricted functionality.

The settings in questions are CURLOPT_FTP_ACCOUNT, CURLOPT_FTP_ALTERNATIVE_TO_USER, CURLOPT_FTP_SSL_CCC and CURLOPT_USE_SSL level.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM MQ: 9.0.0.14 - 9.3.2.0

CPE2.3
External links

https://www.ibm.com/support/pages/node/6986579


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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