Privilege escalation via unrestricted IPC procedure calls
Published Jun 28, 2025 · Updated Jun 30, 2025
Improper access control in JOYNEXT MIB3 OI MQB 0304 and earlier allows local users to invoke privileged service procedures. The custom IPC mechanism on the R-CAR M3 SoC performs no privilege check, so any process that initializes it can call any remote procedure exposed by participating services. A low-privileged process already running on the head unit is required; unrestricted calls can cross OS service boundaries and, when chained with the networking-service command injection, lead to root access.
Summary
What happened
Improper access control in JOYNEXT MIB3 OI MQB 0304 and earlier allows local users to invoke privileged service procedures. The custom IPC mechanism on the R-CAR M3 SoC performs no privilege check, so any process that initializes it can call any remote procedure exposed by participating services. A low-privileged process already running on the head unit is required; unrestricted calls can cross OS service boundaries and, when chained with the networking-service command injection, lead to root access.
The record
- CVE
- CVE-2023-29113
- Published
- Jun 28, 2025
- Updated
- Jun 30, 2025
- Vendor
- JOYNEXT GmbH
- Product
- JOYNEXT MIB3 OI MQB
- Classifications
- CWE-284, CAPEC-180, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 28, 2025CVE publishedPublication date reported by the CVE source.
- Jun 30, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=0304
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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