#VU52843 Stack-based buffer overflow in Informix Dynamic Server - CVE-2021-20515

Vulnerability identifier: #VU52843

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20515

CWE-ID: CWE-121

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Informix Dynamic Server
Server applications / Web servers

Vendor: IBM Corporation

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A local administrator can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Informix Dynamic Server: 14.10

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External links
https://exchange.xforce.ibmcloud.com/vulnerabilities/198366
https://www.ibm.com/support/pages/node/6448568

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.