Security Bulletin
Summary
ISC BIND is vulnerable to this security vulnerability. IBM i has addressed this vulnerability.
Vulnerability Details
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by a flaw when setting the TCP client quota using the tcp-clients option. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause the exhaustion of file descriptors.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/160127 for the current score
CVSS Environmental Score*: Undefined
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
Remediation/Fixes
The issue can be fixed by applying a PTF to IBM i.
Releases 7.1, 7.2, 7.3, and 7.4 of IBM i are supported and will be fixed.
The IBM i PTF numbers are:
Release 7.1 – SI69882
Release 7.2 – SI69883
Release 7.3 – SI69885
Release 7.4 – SI69886
https://www-945.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 June 2019: Original Version Published
*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.
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Document Information
Modified date:
18 December 2019
UID
ibm10883384