CVE-2023-21190 — In btm_acl_encrypt_change of btm_acl

In btm_acl_encrypt_change of btm_acl.cc, there is a possible way for a remote device to turn off encryption without resulting in a terminated connection due to an unusual root cause. This could lead to local information disclosure with no additional execution privileges needed. U

01What is this vulnerability?

In btm_acl_encrypt_change of btm_acl.cc, there is a possible way for a remote device to turn off encryption without resulting in a terminated connection due to an unusual root cause. This could lead to local information disclosure with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-251436534

02Affected products

Vendor	Product	Versions
n	a / Android	Android-13

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

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

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: 2023-06-28T00:00:00.000Z
• Last modified: 2024-12-04T21:36:47.660Z

09References

• source.android.com — https://source.android.com/security/bulletin/pixel/2023-06-01