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Security Bulletin: ISC DHCP for IBM i is affected by CVE-2021-25217

Security Bulletin


Summary

ISC DHCP on IBM i is vulnerable to the issue described in the vulnerability details section. IBM i has addressed the vulnerability in the ISC DHCP implementation.

Vulnerability Details

CVEID:   CVE-2021-25217
DESCRIPTION:   ISC DHCP is vulnerable to a denial of service, caused by a buffer overrun in program code used to read and parse stored leases. A remote attacker from within the local network could exploit this vulnerability to cause a crash in the DHCP server or DHCP client.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/202604 for the current score.
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
IBM i7.4
IBM i7.3
IBM i7.2
IBM i7.1

Remediation/Fixes

The issue can be fixed by applying a PTF to IBM i.
Releases 7.4, 7.3, 7.2, and 7.1 of IBM i are supported and will be fixed.
The IBM i PTF numbers containing the fix for the CVE are:  

Release 7.4 -  SI76506
Release 7.3 -  SI76507
Release 7.2 -  SI76509
Release 7.1 -  SI76508

https://www.ibm.com/support/fixcentral

Important note: IBM recommends that all users running unsupported versions of affected products upgrade to supported and fixed version of affected products.

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Change History

17 Sep 2021: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location

Worldwide

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Document Information

Modified date:
17 September 2021

UID

ibm16490433