CVE-2026-44905— Vanetza 安全漏洞

Vanetza: Remote Denial of Service via Uncaught OER Encoding Exception in Cryptographic Verification

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

未捕获的异常

Vanetza 安全漏洞

Vanetza是Raphael Riebl个人开发者的一个车载通信协议套件的开源实现。 Vanetza 26.02及之前版本存在安全漏洞，该漏洞源于ASN.1解码器接受语法有效但语义违反约束的V2X消息，当StraightVerifyService尝试重新编码签名证书时，检测到语义违规并抛出未捕获的std::runtime_error，导致进程终止。

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