Samsung Exynos Modem 5123/Exynos Modem 5300 Shannon RCS default permission

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Samsung Exynos Modem 5123 and Exynos Modem 5300 and classified as critical. This issue affects some unknown processing of the component Shannon RCS. The manipulation leads to default permission. This vulnerability is traded as CVE-2023-31116. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Samsung Exynos Modem 5123 and Exynos Modem 5300 (the affected version unknown). This issue affects an unknown part of the component Shannon RCS. The manipulation with an unknown input leads to a default permission vulnerability. Using CWE to declare the problem leads to CWE-276. During installation, installed file permissions are set to allow anyone to modify those files. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in the Shannon RCS component in Samsung Exynos Modem 5123 and 5300. An incorrect default permission can cause unintended querying of RCS capability via a crafted application.

The weakness was shared 06/08/2023. It is possible to read the advisory at semiconductor.samsung.com. The identification of this vulnerability is CVE-2023-31116 since 04/24/2023. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1222 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-35442). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 9.8
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Default permission
CWE: CWE-276 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/24/2023 🔍
06/08/2023 +45 days 🔍
06/08/2023 +0 days 🔍
12/24/2025 +930 days 🔍

Sourcesinfo

Vendor: samsung.com

Advisory: semiconductor.samsung.com
Status: Confirmed

CVE: CVE-2023-31116 (🔍)
GCVE (CVE): GCVE-0-2023-31116
GCVE (VulDB): GCVE-100-231059
EUVD: 🔍

Entryinfo

Created: 06/08/2023 08:53
Updated: 12/24/2025 11:40
Changes: 06/08/2023 08:53 (37), 07/07/2023 08:19 (11), 01/07/2025 19:53 (26), 12/24/2025 11:40 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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