CVE-2023-40638 — In Telecom service, there is a possible missing permission check

In Telecom service, there is a possible missing permission check. This could lead to local denial of service with System execution privileges needed

01What is this vulnerability?

In Telecom service, there is a possible missing permission check. This could lead to local denial of service with System execution privileges needed

02Affected products

Vendor	Product	Versions
Unisoc (Shanghai) Technologies Co., Ltd.	T760/T770/T820/S8000	Android11

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-10-08T03:35:59.919Z
• Last modified: 2024-09-19T15:07:24.415Z

09References

• www.unisoc.com — https://www.unisoc.com/en_us/secy/announcementDetail/https://www.unisoc.com/en_u…