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2 vulnerabilities by riebl
CVE-2026-44905 (GCVE-0-2026-44905)
Vulnerability from cvelistv5 – Published: 2026-05-26 21:18 – Updated: 2026-05-27 13:01
VLAI
Title
Vanetza: Remote Denial of Service via Uncaught OER Encoding Exception in Cryptographic Verification
Summary
Vanetza is an open-source implementation of the ETSI C-ITS protocol suite. In 26.02 and earlier, a denial-of-service vulnerability was identified in the cryptographic verification pipeline of Vanetza. When processing incoming V2X messages, the ASN.1 decoder accepts the structure as syntactically valid. However, this reveals a logic-based protocol failure where semantic constraints on specific fields are only strictly enforced during OER re-encoding. Specifically, if a crafted packet contains a certificate where the Psid (Provider Service Identifier) sub-type violates subtype constraints (e.g., out-of-range or invalid CHOICE variant), it is accepted during initial parsing, where subtype constraints are not enforced. Later, when StraightVerifyService attempts to calculate a message hash for cryptographic verification, it must re-encode the signing certificate. The underlying ASN.1 wrapper (asn1c_wrapper.cpp) detects the semantic violation during encoding and raises a std::runtime_error. This exception is not caught within the encoding path and propagates to std::terminate, resulting in immediate process termination. This vulnerability is fixed with commit e1a2e2709210d309458c3d77f98d50dec26c0df0.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-248 - Uncaught Exception
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/riebl/vanetza/security/advisor… | x_refsource_CONFIRM |
| https://github.com/riebl/vanetza/commit/e1a2e2709… | x_refsource_MISC |
Impacted products
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CVE-2026-43988 (GCVE-0-2026-43988)
Vulnerability from cvelistv5 – Published: 2026-05-26 21:17 – Updated: 2026-05-27 18:36
VLAI
Title
Vanetza: Remote Denial of Service via Uncaught Exception in ASN.1/OER Parsing
Summary
Vanetza is an open-source implementation of the ETSI C-ITS protocol suite. In 26.02 and earlier, a denial-of-service vulnerability was identified in the ASN.1/OER parsing pipeline of Vanetza. When processing malformed network packets containing corrupted ASN.1/OER structures (e.g., invalid length fields or malformed certificate encoding), the ASN.1 wrapper (asn1c_wrapper.cpp) raises a std::runtime_error. This exception is not caught at the parsing boundary and propagates to std::terminate, resulting in process termination. This vulnerability is fixed with commit 62dfe58a8342512b6e1947d75821402ada524f1a.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-248 - Uncaught Exception
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/riebl/vanetza/security/advisor… | x_refsource_CONFIRM |
| https://github.com/riebl/vanetza/commit/62dfe58a8… | x_refsource_MISC |
Impacted products
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