CVE-2023-26076

Shannon Baseband NrSmPcoCodec Intra-Object Overflow

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in Samsung Mobile Chipset and Baseband Modem Chipset for Exynos 1280, Exynos 2200, Exynos Modem 5123, Exynos Modem 5300, and Exynos Auto T5123. An intra-object overflow in the 5G SM message codec can occur due to insufficient parameter validation when decoding reserved options.

There is an intra-object overflow in Shannon Baseband, inside the 5G SM protocol implementation (NrSmMsgCodec as it is called in Shannon according to debug strings), when decoding the Extended protocol configuration options message (IEI = 0x7B).

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-02-19 CVE Reserved
2023-03-13 CVE Published
2024-08-02 CVE Updated
2024-11-01 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CAPEC

References (5)

URL	Tag	Source
http://packetstormsecurity.com/files/171400/Shannon-Baseband-NrSmPcoCodec-Intra-Object-Overflow.html
https://googleprojectzero.blogspot.com/2023/03/multiple-internet-to-baseband-remote-rce.html
https://semiconductor.samsung.com/processor/mobile-processor	Product
https://semiconductor.samsung.com/processor/modem	Product

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://semiconductor.samsung.com/support/quality-support/product-security-updates	2023-03-20

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Samsung Search vendor "Samsung"	Exynos 1280 Firmware Search vendor "Samsung" for product "Exynos 1280 Firmware"	-	-	Affected	in	Samsung Search vendor "Samsung"	Exynos 1280 Search vendor "Samsung" for product "Exynos 1280"	-	-	Safe
Samsung Search vendor "Samsung"	Exynos 2200 Firmware Search vendor "Samsung" for product "Exynos 2200 Firmware"	-	-	Affected	in	Samsung Search vendor "Samsung"	Exynos 2200 Search vendor "Samsung" for product "Exynos 2200"	-	-	Safe
Samsung Search vendor "Samsung"	Exynos Modem 5123 Firmware Search vendor "Samsung" for product "Exynos Modem 5123 Firmware"	-	-	Affected	in	Samsung Search vendor "Samsung"	Exynos Modem 5123 Search vendor "Samsung" for product "Exynos Modem 5123"	-	-	Safe
Samsung Search vendor "Samsung"	Exynos Modem 5300 Firmware Search vendor "Samsung" for product "Exynos Modem 5300 Firmware"	-	-	Affected	in	Samsung Search vendor "Samsung"	Exynos Modem 5300 Search vendor "Samsung" for product "Exynos Modem 5300"	-	-	Safe
Samsung Search vendor "Samsung"	Exynos Auto T5123 Firmware Search vendor "Samsung" for product "Exynos Auto T5123 Firmware"	-	-	Affected	in	Samsung Search vendor "Samsung"	Exynos Auto T5123 Search vendor "Samsung" for product "Exynos Auto T5123"	-	-	Safe