Security Bulletin: IBM i is affected by DHCP vulnerabilities (CVE-2015-8605 and CVE-2016-2774).

Summary

IBM i DHCP is vulnerable to several security vulnerabilities.

Vulnerability Details

CVEID: CVE-2015-8605 DESCRIPTION: ISC DHCP is vulnerable to a denial of service, caused by the failure to properly check the UDP payload length. By sending a specially crafted packet with an invalid IPv4 UDP length field, a remote attacker from within the local network could exploit this vulnerability to cause the DHCP server, client, or relay program to terminate.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109586 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2016-2774 DESCRIPTION: ISC DHCP is vulnerable to a denial of service, caused by the failure to limit the number of open TCP connections to the ports for inter-process communications and control. By opening a large number of TCP connections, a remote attacker from within the local network could exploit this vulnerability to become unresponsive or consume all available sockets.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/111319 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Releases 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 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 7.1 – SI60082 Release 7.2 – SI60110 Release 7.3 – SI60111

_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 known