#VU23862 Heap-based buffer overflow in USG9500 - CVE-2019-5275

Vulnerability identifier: #VU23862

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-5275

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
USG9500
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Huawei

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the X.509 implementation. A remote attacker can use a specially crafted certificate, trigger heap-based buffer overflow and cause a denial of service on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

USG9500: V500R001C30 - V500R001C60

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External links
https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191225-01-eudemon-en

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.