CVE-2026-47241— Ruby net-imap 输入验证错误漏洞

Net::IMAP: Denial of Service via incomplete raw argument validation

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a raw string argument which is only validated to prevent CRLF injection and then sent verbatim. If this string is derived from user-controlled input, an attacker can force the next command to be absorbed as a continuation of the first command. This will cause the first command to eventually fail, but also prevents it from returning until another command is sent (from another thread). That other command will not return until the connection is closed. This vulnerability is fixed in 0.6.5 and 0.5.15.

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

结尾特殊元素转义处理不恰当

Ruby net-imap 输入验证错误漏洞

Ruby net-imap是Ruby的邮件客户端协议库。 Ruby net-imap存在输入验证错误漏洞，该漏洞源于多个Net::IMAP命令接受原始字符串参数并仅验证防止CRLF注入，可能导致攻击者强制下一个命令被吸收为第一个命令的延续，导致命令失败并阻止返回直至连接关闭。以下版本受到影响：0.6.0版本至0.6.4.1版本和0.5.15之前版本。

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