There is a TLS certificate verification vulnerability in the SIP TLS module of Huawei 7900 IP Phones. Due to insufficient verification of specific parameters of the TLS server certificate, attackers can perform man-in-the-middle attacks, leading to the affected phones registered abnormally, affecting the availability of IP phones. (Vulnerability ID: HWPSIRT-2019-02212)
This vulnerability has been assigned a Common Vulnerabilities and Exposures (CVE) ID: CVE-2019-5280.
Huawei has released software updates to fix this vulnerability. This advisory is available at the following link:
Resolved Product and Version
CloudLink Phone 7900
The attacker can exploit this vulnerability to cause affected phones registered abnormally, affecting the availability of IP phones.
The vulnerability classification has been performed by using the CVSSv3 scoring system (http://www.first.org/cvss/specification-document).
Base Score: 6.5 (AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H)
Temporal Score: 6.0 (E:F/RL:O/RC:C)
Overall Score: 6.0
This vulnerability can be exploited only when the following conditions are present:
The attacker can intercept the communication data between the two communication parties.
Due to insufficient verification of specific parameters of the TLS server certificate, attackers can perform man-in-the-middle attacks, leading to the affected phones registered abnormally, affecting the availability of IP phones.
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 security researcher Alexander Traud. Huawei would like to thank Alexander Traud for working with us and coordinated vulnerability disclosure to protect our customers.
2019-07-24 V1.0 INITIAL
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