Multiple vulnerabilities in IBM CICS TX Standard and Advanced
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2023-3978 CVE-2023-44487 CVE-2023-39325 |
| CWE-ID | CWE-79 CWE-400 |
| Exploitation vector | Network |
| Public exploit | Vulnerability #2 is being exploited in the wild. |
| Vulnerable software |
IBM CICS TX Advanced Universal components / Libraries / Software for developers IBM CICS TX Standard Universal components / Libraries / Software for developers |
| Vendor | IBM Corporation |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Cross-site scripting
EUVDB-ID: #VU79294
Risk: Low
CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]
CVE-ID: CVE-2023-3978
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
MitigationInstall update from vendor's website.
Vulnerable software versionsIBM CICS TX Advanced: before 11.1.0.0 ifix15
IBM CICS TX Standard: before 11.1.0.0 ifix15
CPE2.3- cpe:2.3:a:ibm_corporation:ibm_cics_tx_advanced:*:*:*:*:*:*:*:*
- cpe:2.3:a:ibm_corporation:ibm_cics_tx_standard:*:*:*:*:*:*:*:*
https://www.ibm.com/support/pages/node/7091175
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) Resource exhaustion
EUVDB-ID: #VU81728
Risk: High
CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:A/U:Amber]
CVE-ID: CVE-2023-44487
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improperly control of consumption for internal resources when handling HTTP/2 requests with compressed HEADERS frames. A remote attacker can send a sequence of compressed HEADERS frames followed by RST_STREAM frames and perform a denial of service (DoS) attack, a.k.a. "Rapid Reset".
Note, the vulnerability is being actively exploited in the wild.
Install update from vendor's website.
Vulnerable software versionsIBM CICS TX Advanced: before 11.1.0.0 ifix15
IBM CICS TX Standard: before 11.1.0.0 ifix15
CPE2.3- cpe:2.3:a:ibm_corporation:ibm_cics_tx_advanced:*:*:*:*:*:*:*:*
- cpe:2.3:a:ibm_corporation:ibm_cics_tx_standard:*:*:*:*:*:*:*:*
https://www.ibm.com/support/pages/node/7091175
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?
Yes. This vulnerability is being exploited in the wild.
3) Resource exhaustion
EUVDB-ID: #VU82064
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-2023-39325
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 excessive consumption of internal resources when handling HTTP/2 requests. A remote attacker can bypass the http2.Server.MaxConcurrentStreams setting by creating new connections while the current connections are still being processed, trigger resource exhaustion and perform a denial of service (DoS) attack.
MitigationInstall update from vendor's website.
Vulnerable software versionsIBM CICS TX Advanced: before 11.1.0.0 ifix15
IBM CICS TX Standard: before 11.1.0.0 ifix15
CPE2.3- cpe:2.3:a:ibm_corporation:ibm_cics_tx_advanced:*:*:*:*:*:*:*:*
- cpe:2.3:a:ibm_corporation:ibm_cics_tx_standard:*:*:*:*:*:*:*:*
https://www.ibm.com/support/pages/node/7091175
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.
