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Security Bulletin: IBM i is affected by networking BIND vulnerabilities (CVE-2017-3136, CVE-2017-3137 and CVE-2017-3138)

Security Bulletin


Summary

ISC BIND is vulnerable to several security vulnerabilities. IBM i has addressed these vulnerabilities.

Vulnerability Details

CVEID: CVE-2017-3138
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by an error related to the processing of control channel commands. By sending a specially crafted command, a remote attacker with access to the BIND control channel could exploit this vulnerability to make named exit unexpectedly with an assertion failure.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/124518 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2017-3136
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by the improper handling of query requests when using DNS64 with "break-dnssec yes" option. By sending a specially crafted DNS request, a remote attacker could exploit this vulnerability to make named exit unexpectedly with an assertion failure.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/124516 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2017-3137
DESCRIPTION: ISC BIND is vulnerable to a denial of service, caused by the improper handling of a query response containing CNAME or DNAME resource records in an unusual order. By sending a specially crafted DNS response, a remote attacker could exploit this vulnerability to make named exit unexpectedly with an assertion failure.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/124517 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

Releases 6.1, 7.1, 7.2 and 7.3 of IBM i are affected.

Remediation/Fixes

The issue can be fixed by applying a PTF to IBM i.

Releases 6.1, 7.1, 7.2 and 7.3 of IBM i are supported and will be fixed.

http://www-933.ibm.com/support/fixcentral/


The IBM i PTF numbers are:

Release 6.1 – SI64617
Release 7.1 – SI64615
Release 7.2 – SI64630
Release 7.3 – SI64614

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

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References

Off

*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

nas8N1021999