Improper validation of array index in IBM CICS TX Advanced



Published: 2023-02-17
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-28851
CVE-2020-28852
CWE-ID CWE-129
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		IBM CICS TX Advanced
Universal components / Libraries / Software for developers

Vendor IBM Corporation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Validation of Array Index

EUVDB-ID: #VU68779

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28851,CVE-2020-28852

CWE-ID: CWE-129 - Improper Validation of Array Index

Exploit availability: No

Description

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

The vulnerability exists due to improper validation of array index in language.ParseAcceptLanguage while processing a BCP 47 tag. A remote attacker can send a specially crafted HTTP request containing a malformed HTTP Accept-Language header and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM CICS TX Advanced: before 11.1.0.0 ifix5

External links

http://www.ibm.com/support/pages/node/6833290


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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