CVE-2026-107581— hMailServer 算法复杂度低效漏洞
一分钟漏洞结论
影响对象
Progressive Robot Ltd hMailServer
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
这段漏洞描述可以翻译为： Progressive Robot开发的hMailServer版本6.0.0至6.3.5在处理来自已登录用户的多个IMAP命令时，其处理时间与命令长度或其命名元素数量成二次方关系，并且可能导致内存使用量远超命令所需比例。FETCH数据项解析器通过不区分大小写的字符串替换操作规范化BODY[]部分，每次遇到匹配项都会复制整个项目，并通过不断复制命令剩余部分来分割项目列表；服务器不区分大小写的搜索在每一个位置都重新比较目标字符串，因此当在一个长消息上使用长SEARCH TEXT键时，成本是两个
可能的 ATT&CK 技术 1 AI
T1496 · Resource Hijacking
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一、 漏洞 CVE-2026-107581 基础信息
漏洞信息
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Vulnerability Title
Inefficient Algorithmic Complexity in hMailServer
来源: CVE Program / CVE List V5
Vulnerability Description
Progressive Robot hMailServer 6.0.0 through 6.3.5 processes several IMAP commands from a signed-in account in time quadratic in the command's length or in the number of elements it names, and can be made to hold memory out of proportion to a command. The FETCH data-item parser normalised a BODY[] section with a case-insensitive string replacement that copied the whole item per occurrence and split the item list by repeatedly copying the remainder of the command; the server's case-insensitive search compared a needle afresh at every position, so a long SEARCH TEXT key over a message cost the product of the two lengths; SEARCH message sets and the saved-result marker ($), SORT criteria, HEADER.FIELDS name lists and UID ranges were each read once per message rather than once per command; and a FETCH naming a message's sections very many times read and held every section in memory before sending any. An IMAP command may continue past one line through non-synchronizing literals, so one command can reach about eleven megabytes. The IMAP worker threads are a small pool shared with SMTP and POP3, so a signed-in user sending such commands can make the IMAP, SMTP and POP3 services stop responding (CWE-407) and can consume excessive memory (CWE-400).
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Progressive Robot Ltd | hMailServer | 6.0.0 ~ 6.3.6 | - |
|
二、漏洞 CVE-2026-107581 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-107581 其他参考 (2)
同批安全公告 · Progressive Robot Ltd · 2026-10-08 · 共 22 条
| CVE-2026-103647 | 8.0 HIGH | hMailServer 跨站脚本漏洞 |
| CVE-2026-103010 | 7.8 HIGH | hMailServer 堆缓冲区溢出漏洞 |
| CVE-2026-104660 | 7.8 HIGH | hMailServer 缺少授权漏洞 |
| CVE-2026-104658 | 7.8 HIGH | hMailServer 安全决策依赖不可信输入漏洞 |
| CVE-2026-107573 | 7.8 HIGH | hMailServer 默认权限配置错误漏洞 |
| CVE-2026-107577 | 7.5 HIGH | hMailServer 无限循环漏洞 |
| CVE-2026-107574 | 7.5 HIGH | hMailServer 低效算法复杂度漏洞 |
| CVE-2026-107579 | 7.5 HIGH | hMailServer 算法复杂度低效漏洞 |
| CVE-2026-107576 | 7.5 HIGH | hMailServer 算法复杂度低效漏洞 |
| CVE-2026-104659 | 7.5 HIGH | hMailServer 邮件验证错误 |
| CVE-2026-103649 | 7.5 HIGH | hMailServer 同步访问远程资源无超时漏洞 |
| CVE-2026-107584 | 7.4 HIGH | hMailServer 安全失败机制缺陷 |
| CVE-2026-104704 | 7.4 HIGH | hMailServer 敏感信息明文传输漏洞 |
| CVE-2026-107578 | 6.7 MEDIUM | hMailServer 链接解析不当导致远程代码执行漏洞 |
| CVE-2026-107583 | 6.5 MEDIUM | hMailServer 算法复杂度低效漏洞 |
| CVE-2026-107572 | 6.5 MEDIUM | hMailServer 正则表达式复杂度低效漏洞 |
| CVE-2026-107582 | 6.5 MEDIUM | hMailServer 算法复杂度低效漏洞 |
| CVE-2026-107580 | 6.5 MEDIUM | hMailServer 算法复杂度低漏洞 |
| CVE-2026-103011 | 6.5 MEDIUM | hMailServer 堆缓冲区溢出漏洞 |
| CVE-2026-107587 | 5.9 MEDIUM | hMailServer 证书验证不当漏洞 |
显示前 20 条，共 22 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-107581
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