CVE-2023-6317 PIN/prompt bypass on the secondscreen.gateway service allows access to the SSAP API without user interaction

What is CVE-2023-6317?

CVE-2023-6317 is a high-severity authentication bypass vulnerability in LG WebOS, published on 9 Apr 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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. 

Full versions and TV models affected:

webOS 4.9.7 - 5.30.40 running on LG43UM7000PLA webOS 5.5.0 - 04.50.51 running on OLED55CXPUA webOS 6.3.3-442 (kisscurl-kinglake) - 03.36.50 running on OLED48C1PUB   webOS 7.3.1-43 (mullet-mebin) - 03.33.85 running on OLED55A23LA

Weakness: CWE-639

Which versions are affected by CVE-2023-6317?

It affects 1 product.

Products include Lg Webos.

How do I fix CVE-2023-6317?

No fix has been published for CVE-2023-6317 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2023-6317 being exploited?

There is no known exploitation of CVE-2023-6317 in the wild and no public exploit code.

Other vulnerabilities in LG WebOS

• CVE-2022-23730 Auth bypass in LG webOS TV Critical 9.8
• CVE-2023-6318 Command injection in the processAnalyticsReport method from the com.webos.service.cloudupload service Critical 9.1
• CVE-2023-6319 Command injection in the getAudioMetadata method from the com.webos.service.attachedstoragemanager service Critical 9.1
• CVE-2023-6320 Command injection in the com.webos.service.connectionmanager/tv/setVlanStaticAddress endpoint Critical 9.1
• CVE-2022-23731 Privilege escalation in LG webOS TV High 7.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-rm4x-93m8-4qcv.