Security Bulletin
Summary
BIND is used by IBM i. IBM i has addressed the applicable CVEs.
Vulnerability Details
CVEID: CVE-2021-25214
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by a broken inbound incremental zone update (IXFR). By sending a specially crafted IXFR, an attacker could exploit this vulnerability to trigger a failed assertion check and terminate the named process.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/200961 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2021-25215
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by an assertion failure while answering queries for DNAME records. By sending a query for DNAME records, an attacker could exploit this vulnerability to trigger a failed assertion check and terminate the named process.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/200960 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM i | 7.4 |
| IBM i | 7.3 |
| IBM i | 7.2 |
| IBM i | 7.1 |
Remediation/Fixes
The issues 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 are:
Release 7.4 – SI76268
Release 7.3 – SI76269
Release 7.2 – SI76272
Release 7.1 – SI76273
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
Change History
17 Jun 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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
Was this topic helpful?
Document Information
Modified date:
17 June 2021
Initial Publish date:
17 June 2021
UID
ibm16464841