CVE-2023-6317 — A prompt bypass exists in the secondscreen

A prompt bypass exists in the secondscreen.gateway service running on webOS version 4 through 7. An attacker can create a privileged account without asking the user for the security PIN.

01What is this vulnerability?

A prompt bypass exists in the secondscreen.gateway service running on webOS version 4 through 7. An attacker can create a privileged account without asking the user for the security PIN.

02Affected products

Vendor	Product	Versions
LG	WebOS	4.9.7, 5.5.0, 6.3.3-442, 7.3.1-43

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: 2024-04-09T13:41:34.843Z
• Last modified: 2024-08-02T08:28:21.578Z

09References

• bitdefender.com — https://bitdefender.com/blog/labs/vulnerabilities-identified-in-lg-webos/
• lgsecurity.lge.com — https://lgsecurity.lge.com/bulletins/tv#updateDetails