FusionStorage is a piece of distributed block storage software specifically designed for the storage infrastructure of cloud computing data centers.
The maintenance module of Huawei FusionStorage has a privilege escalation vulnerability. After logging in to the FusionStorage successfully as a common OS user, an attacker could create documents according to special rules. Eventually, the attacker can obtain the OS root privilege of FusionStorage. (Vulnerability ID: HWPSIRT-2016-11025)
This vulnerability has been assigned Common Vulnerabilities and Exposures (CVE) ID: CVE-2016-8803.
Huawei has released software updates to fix these vulnerabilities. This advisory is available at the following link:
Resolved Product and Version
FusionStorage Block V100R003C30U2
 FusionStorage has been renamed FusionStorage Block from V100R003C30U2.
By exploiting this vulnerability, the attacker can obtain the OS root privilege of FusionStorage, causing the leakage of sensitive information and interruption of maintenance services.
The vulnerability classification has been performed by using the CVSSv3 scoring system (https://www.first.org/cvss/specification-document).
Base Score: 5.0 (AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L)
Temporal Score: 4.7(E:F/RL:O/RC:C)
The attacker logs in to the FusionStorage as a common OS user.
2. Attacking procedure:
The maintenance module of Huawei FusionStorage has a privilege escalation vulnerability. After logging in to the FusionStorage successfully as a common OS user, an attacker could create documents according to special rules. Eventually, the attacker can obtain the OS root privilege of FusionStorage.
Customers should contact Huawei TAC (Huawei Technical Assistance Center) to request the upgrades. For TAC contact information, please refer to Huawei worldwide website at http://www.huawei.com/en/psirt/report-vulnerabilities.
This vulnerability was discovered by Huawei internal tester.
2016-11-23 V1.0 INITIAL
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