Multiple vulnerabilities in IBM Informix Dynamic Server



Published: 2022-04-21
Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-45105
CVE-2021-45046
CWE-ID CWE-835
CWE-94
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Public exploit code for vulnerability #2 is available.
Vulnerable software
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Informix Dynamic Server
Server applications / Web servers

Vendor IBM Corporation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Infinite loop

EUVDB-ID: #VU59051

Risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-45105

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: Yes

Description

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

The vulnerability exists due to infinite loop within the StrSubstitutor class. A remote attacker can pass specially crafted input to the application, consume all available system resources and cause denial of service conditions.

Payload example: ${${::-${::-$${::-j}}}}

Mitigation

Install update from vendor's website.

Vulnerable software versions

Informix Dynamic Server: before 12.10.FC15W1, 14.10.FC7W1


CPE2.3 External links

http://www.ibm.com/blogs/psirt/security-bulletin-ibm-informix-dynamic-server-is-vulnerable-to-denial-of-service-cve-2021-45105-and-remote-code-execution-cve-2021-45046-due-to-apache-log4j/
http://www.ibm.com/support/pages/node/6572685

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Code Injection

EUVDB-ID: #VU58976

Risk: High

CVSSv3.1: 8.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-45046

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to incomplete patch in Apache Log4j 2.15.0 for a code injection vulnerability #VU58816 (CVE-2021-44228) in certain non-default configurations. A remote attacker with control over Thread Context Map (MDC) input data when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) can pass malicious data using a JNDI Lookup pattern and perform a denial of service (DoS) attack, exfiltrate data or execute arbitrary code.

Later discovery demonstrates a remote code execution on macOS but no other tested environments.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Informix Dynamic Server: before 12.10.FC15W1, 14.10.FC7W1


CPE2.3 External links

http://www.ibm.com/blogs/psirt/security-bulletin-ibm-informix-dynamic-server-is-vulnerable-to-denial-of-service-cve-2021-45105-and-remote-code-execution-cve-2021-45046-due-to-apache-log4j/
http://www.ibm.com/support/pages/node/6572685

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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