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

Quick assessment

Affected
LG WebOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LG webOS是韩国乐金（LG）公司的一个基于 Linux 内核的智能电视操作系统。 LG webOS 存在安全漏洞，该漏洞源于secondscreen.gateway服务中存在提示旁路。攻击者可利用该漏洞创建一个特权帐户，而无需向用户询问安全PIN。受影响的产品和版本:webOS 4.9.7至5.30.40版本，5.5.0至04.50.51版本，6.3.3-442 (kisscurl-kinglake)至03.36.50版本，7.3.1-43 (mullet-mebin)至03.33.85版本。

CVSS 7.2 · High EPSS 1.08% · P64
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I. Basic Information for CVE-2023-6317

Vulnerability Information
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Vulnerability Title
PIN/prompt bypass on the secondscreen.gateway service allows access to the SSAP API without user interaction
Source: CVE Program / CVE List V5
Vulnerability 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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
LG webOS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LG webOS是韩国乐金（LG）公司的一个基于 Linux 内核的智能电视操作系统。 LG webOS 存在安全漏洞，该漏洞源于secondscreen.gateway服务中存在提示旁路。攻击者可利用该漏洞创建一个特权帐户，而无需向用户询问安全PIN。受影响的产品和版本:webOS 4.9.7至5.30.40版本，5.5.0至04.50.51版本，6.3.3-442 (kisscurl-kinglake)至03.36.50版本，7.3.1-43 (mullet-mebin)至03.33.85版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
LG WebOS 4.9.7 -

II. Public POCs for CVE-2023-6317

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III. Intelligence Information for CVE-2023-6317

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Security Blog Posts for CVE-2023-6317 (1)

Other References for CVE-2023-6317 (1)

Same Patch Batch · LG · 2024-04-09 · 4 CVEs total

CVE-2023-6318 9.1 CRITICAL Command injection in the processAnalyticsReport method from the com.webos.service.cloudupl
CVE-2023-6319 9.1 CRITICAL Command injection in the getAudioMetadata method from the com.webos.service.attachedstorag
CVE-2023-6320 9.1 CRITICAL Command injection in the com.webos.service.connectionmanager/tv/setVlanStaticAddress endpo

IV. Related Vulnerabilities

Same product: WebOS
Same vendor: LG
Same weakness: CWE-639

V. Comments for CVE-2023-6317

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