| 标题 | The Trusted Domain Project OpenARC 1.0.0 NULL Pointer Dereference |
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| 描述 | OpenARC contains a NULL pointer dereference in `arc_parse_canon_t()` when processing the `c=` canonicalization tag of an ARC signature header. If the tag specifies only one canonicalization algorithm, the parser treats the omitted second value as NULL and passes it to a string-comparison function, causing a segmentation fault.
The single-value form is permitted by the applicable specification, which requires the omitted value to be replaced with a default. A remote unauthenticated attacker can trigger the vulnerability by sending a message containing a complete ARC header set with a single-value `c=` tag.
Successful exploitation crashes the ARC verification process and may interrupt mail processing, resulting in denial of service. |
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| 来源 | ⚠️ https://weitongli.com/share/openarc-c-tag-null-deref.html |
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| 用户 | WeitongLi (UID 100239) |
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| 提交 | 2026-08-06 12時08分 (2 月前) |
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| 管理 | 2026-09-27 10時22分 (2 months later) |
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| 状态 | 已接受 |
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| VulDB条目 | 410845 [Trusted Domain Project OpenARC 直到 1.0.0.Beta1 libopenarc libopenarc/arc-canon.c arc_parse_canon_t 拒绝服务] |
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| 积分 | 20 |
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