漏洞信息
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Vulnerability Title
Rocq Prover through 9.2.0 Guard Checker Trusts Corrupted Recursive Tree After Transport
Vulnerability Description
The guard checker in Rocq Prover does not recheck the recursive tree representation of an inductive type parameter after that parameter has been changed by transport. A fixpoint may apply a rewrite along an equality between types to its recursive argument, which the guard checker accepts because the inductive type is preserved, while the recursive tree recorded for the parameter is altered. A second fixpoint that calls the first inherits the altered recursive tree without verification, so a call that is not structurally decreasing is accepted as terminating. The resulting non-terminating definition proves that a natural number equals its own successor and therefore False, from which any proposition follows. The demonstration uses two axioms that follow from univalence and are consistent with the calculus of inductive constructions, so the contradiction comes from the guard check rather than from the assumptions. A fix is proposed but not merged.
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
Vulnerability Type
控制流实现总是不正确
Vulnerability Title
Rocq Prover 处理逻辑错误漏洞
Vulnerability Description
Rocq Prover是Rocq Prover组织的一个形式化证明辅助软件。 Rocq Prover 9.2.0及之前版本存在处理逻辑错误漏洞,该漏洞源于守卫检查器在类型参数经过transport改变后未重新检查其递归树表示,可能导致非终止定义被接受为终止,从而证明自然数等于其后继并推导出False,进而可推出任意命题。
CVSS Information
N/A
Vulnerability Type
N/A