Security Bulletin: This Power System firmware update is being released to address DHCP issue number CVE-2018-5732

Summary

POWER9/POWER8: In response to a recently reported DHCP client security vulnerability, a new Power System firmware update is being released to address Common Vulnerabilities and Exposures issue number CVE-2018-5732.

Vulnerability Details

CVEID: CVE-2018-5732

DESCRIPTION: ISC DHCP is vulnerable to a denial of service, caused by a buffer overflow in dhclient. By sending a specially crafted response, a remote attacker could overflow a buffer and possibly execute arbitrary code on the system or cause the server to crash.

CVSS Base Score: 7.5

CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/139613&gt; 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)

The firmware update can be obtained from FixCentral by specifying the Product and fix level as specified in this Remediation section.

Affected Products and Versions

Firmware releases FW910 is affected.

Firmware releases FW810, FW820, FW830, FW840, FW860 are affected.

Remediation/Fixes

Customers with the products below, install FW910.10

1. IBM Power System S922 (9009-22A)

2. IBM Power System H922 (9223-22H)

3. IBM Power System S914 (9009-41A)

4. IBM Power System S924 (9009-42A)

5. IBM Power System H924 (9223-42H)

6. IBM Power System L922 (9008-22L)

Customers with the products below, install FW860.60

1. IBM Power System S812(8284-21A)

2. IBM Power System S822(8284-22A)

3. IBM Power System S814(8286-41A)

4. IBM Power System S824(8286-42A)

5. IBM Power System S812L(8247-21L)

6. IBM Power System S822L(8247-22L)

7. IBM Power System S824L(8247-42L)

8. IBM Power System E850(8408-E8E)

9. IBM Power System E850C(8408-44E)

10. IBM Power System E870(9119-MME)

11. IBM Power System E870C(9080-MME)

12. IBM Power System E880(9119-MHE)

13. IBM Power System E880C(9080-MHE)

14. IBM Power System S812L(5148-21L)

15. IBM Power System S822L(5148-22L)

Workarounds and Mitigations

Static IP can be used for the service processor network configurations instead of dynamic(DHCP) IP to avoid the problem.