Security Advisory - A Security Vulnerability of Using Insecure Random Numbers to Generate Self-signed Certificates in Huawei Products
- SA No:huawei-sa-20160720-01-certificate
- Initial Release Date: 2016-07-20
- Last Release Date: 2016-07-20
Some Huawei products automatically generate self-signed certificates upon the first use. The random numbers used to generate these certificates are not random enough. Different devices' certificates may use the same random number consequently, which contains the risk of an attacker compromising the certificates. (Vulnerability ID: HWNSIRT-2016-05255)
Huawei has released software updates to fix this vulnerability. This advisory is available at the following link:
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160720-01-certificate-en
|
Product Name |
Affected Version |
Resolved Product and Version |
|
S2300/ S2700 |
V100R006C05 V200R003C00 V200R005C00 |
There is no fix now, please refer to "Temporary fixes" part. |
|
S3300 |
V100R006C05 |
|
|
S3700 |
V100R006C05 |
|
|
S5300/ S5700/ S6300/ S6700/ S7700/ S9300/ S9700 |
V200R003C00 V200R005C00 |
|
|
S12700 |
V200R005C00 |
An attacker may identify defective device certificates, compromise them, and obtain the private key. Not all vulnerable devices generate defective certificates. Therefore, the attacker can only compromise specific devices
.
The vulnerability classification has been performed by using the CVSSv2 scoring system (http://www.first.org/cvss/).
Base Score: 4.3 (AV:N/AC:M/Au:N/C:P/I:N/A:N)
Temporal Score: 3.6 (E:F/RL:O/RC:C)An attacker needs to collect devices' certificates.
2. Attacking procedure:
Some Huawei products automatically generate self-signed certificates upon the first use. The random numbers used to generate these certificates are not random enough. Different devices' certificates may use the same random number consequently, which contains the risk of an attacker compromising the certificates.
Users do not use self-signed certificates generated by Huawei devices and can load secure certificates using the certificate load command. For specific operation methods, reference configuration files of product.
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 reported to Huawei PSIRT by Nadia Heninger, Joshua Fried and Marcella Hastings from the University of Pennsylvania. Huawei would like to thank Nadia Heninger, Joshua Fried and Marcella Hastings for working with us and coordinated vulnerability disclosure to protect our customers.
2016-07-20 V1.0 INITIAL
None
Huawei adheres to protecting the ultimate interests of users with best efforts and the principle of responsible disclosure and deal with product security issues through our response mechanism.
To enjoy Huawei PSIRT services and obtain Huawei product vulnerability information, please visit http://www.huawei.com/en/psirt.
To report a security vulnerability in Huawei products and solutions, please send it to PSIRT@huawei.com. For details, please visit http://www.huawei.com/en/psirt/report-vulnerabilities.
