{"id":7539,"date":"2025-07-03T19:34:10","date_gmt":"2025-07-03T19:34:10","guid":{"rendered":"http:\/\/localhost\/?p=7539"},"modified":"2025-07-03T19:34:10","modified_gmt":"2025-07-03T19:34:10","slug":"curl-crlf-injection-in-libcurls-smtp-client-via-mail-from-and-mail-rcpt-allows-smtp-command-smugglin","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=7539","title":{"rendered":"curl: CRLF injection in libcurl&#8217;s SMTP client via &#8211;mail-from and &#8211;mail-rcpt allows SMTP command smuggling"},"content":{"rendered":"<h2>Security Update News<\/h2>\n<h3>Update Information<\/h3>\n<table style=\"width:100%; border-collapse: collapse; margin-bottom: 20px;\">\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Title<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">curl: CRLF injection in libcurl&#8217;s SMTP client via &#8211;mail-from and &#8211;mail-rcpt allows SMTP command smuggling<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Update ID<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">H1:3235428<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Type<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">hackerone<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Published<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">2025-07-03T05:49:06<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Last Updated<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">2025-07-03T22:57:44<\/td>\n<\/tr>\n<\/table>\n<h3>Security Impact<\/h3>\n<table style=\"width:100%; border-collapse: collapse; margin-bottom: 20px;\">\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Severity<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd; color: #666666; font-weight: bold;\">NONE<\/td>\n<\/tr>\n<\/table>\n<h3>AI Analysis<\/h3>\n<table style=\"width:100%; border-collapse: collapse; margin-bottom: 20px;\">\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">AI Description<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">A vulnerability in libcurl&#8217;s SMTP client allows CRLF injection via the &#8211;mail-from and &#8211;mail-rcpt options, enabling SMTP command smuggling. This could allow attackers to inject malicious commands into the SMTP stream, potentially leading to unauthorized email sending or interference with email communications. The issue is related to improper handling of CRLF sequences in the affected options.<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">AI Severity<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">High<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">AI Vendor<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">curl project<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">AI Product<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">libcurl<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">AI Version<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">various versions<\/td>\n<\/tr>\n<\/table>\n<h3>Update Details<\/h3>\n<div style=\"; padding: 15px; border-left: 4px solid #4CAF50; margin-bottom: 20px;\">\nVulnerability description not provided\n<\/div>\n<p><a href=\"https:\/\/hackerone.com\/reports\/3235428\" target=\"_blank\" style=\"display: inline-block; color: white; padding: 10px 20px; text-decoration: none; border-radius: 4px;\">View Advisory Details<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Security Update News Update Information Title curl: CRLF injection in libcurl&#8217;s SMTP client via &#8211;mail-from and &#8211;mail-rcpt allows SMTP command smuggling Update ID H1:3235428 Type&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[6,8,34,12,117,13,33,7,11,5],"class_list":["post-7539","post","type-post","status-publish","format-standard","hentry","category-category_news","tag-cve","tag-cvss","tag-cvss-00","tag-exploit","tag-hackerone","tag-news","tag-none","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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