Security Bulletin
Summary
There are multiple vulnerabilities in the Network Time Protocol (NTP) implementation embedded within the IBM Virtualization Engine TS7700.
Vulnerability Details
CVEID: CVE-2015-7848
DESCRIPTION: Network Time Protocol (NTP) is vulnerable to a denial of service, caused by an multiple integer overflows when processing malicious packets. By sending a specially crafted private mode packet, an attacker could exploit this vulnerability to cause the application to crash.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107443 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:L)
CVEID: CVE-2015-7855
DESCRIPTION: Network Time Protocol (NTP) is vulnerable to a denial of service, caused by ASSERT botch instead of returning FAIL on some invalid values by the decodenetnum() function. An attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107448 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:L)
Affected Products and Versions
All versions of microcode for the IBM Virtualization Engine TS7700 (3957-V06, 3957-V07, 3957-VEA, 3957-VEB, 3957-VEC) prior to and including the following are affected:
|
Machine Type | Model | Version |
| 3957 | V06 | 8.21.0.178 |
| 3957 | VEA | 8.21.0.178 |
| 3957 | V07 | 8.41.101.10 |
| 3957 | VEB | 8.41.101.10 |
| 3957 | VEC | 8.41.101.10 |
Remediation/Fixes
Contact IBM Service at 1-800-IBM-SERV to arrange an upgrade to the latest microcode version followed by the installation of vtd_exec.XXX as needed. Minimum microcode versions are shown below:
|
Machine Type | Model | Fix |
| 3957 | V06 | Upgrade to 8.21.0.178 + VTD_EXEC.103 + VTD_EXEC.279 |
| 3957 | VEA | Upgrade to 8.21.0.178 + VTD_EXEC.103 + VTD_EXEC.279 |
| 3957 | V07 | Upgrade to 8.33.2.9 + VTD_EXEC.103 + VTD_EXEC.279 -OR- Upgrade to 8.40.1.16 + VTD_EXEC.103 + VTD_EXEC.279 -OR- Upgrade to 8.41.100.15 + VTD_EXEC.103 + VTD_EXEC.279 -OR- Upgrade to 8.41.101.10 + VTD_EXEC.103 + VTD_EXEC.279 |
| 3957 | VEB | Upgrade to 8.33.2.9 + VTD_EXEC.103 + VTD_EXEC.279 -OR- Upgrade to 8.40.1.16 + VTD_EXEC.103 + VTD_EXEC.279 -OR- Upgrade to 8.41.100.15 + VTD_EXEC.103 + VTD_EXEC.279 -OR- Upgrade to 8.41.101.10 + VTD_EXEC.103 + VTD_EXEC.279 |
| 3957 | VEC | Upgrade to 8.40.1.16 + VTD_EXEC.103 + VTD_EXEC.279 -OR- Upgrade to 8.41.100.15 + VTD_EXEC.103 + VTD_EXEC.279 -OR- Upgrade to 8.41.101.10 + VTD_EXEC.103 + VTD_EXEC.279 |
The minimum VTD_EXEC version is shown below:
| VTD_EXEC Package | Version |
| VTD_EXEC.103 | v1.67 |
| VTD_EXEC.279 | v1.03 |
Workarounds and Mitigations
Although IBM recommends that you upgrade to the fixes identified above, you can mitigate, but not eliminate the risk of these vulnerabilities by restricting physical and network access to the TS7700 to authorized users and IBM Service Personnel only.
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References
Change History
21 June 2017: 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:
17 June 2018
UID
ssg1S1010078