{"id":182500,"date":"2026-07-07T04:53:59","date_gmt":"2026-07-07T02:54:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dostupen-openssh-10-4"},"modified":"2026-07-07T04:53:59","modified_gmt":"2026-07-07T02:54:00","slug":"dostupen-openssh-10-4","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/news\/dostupen-openssh-10-4","title":{"rendered":"OpenSSH 10.4 is now available.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>After three months of development, OpenSSH 10.4 has been released, an open implementation of the client and server for operation over SSH 2.0 and SFTP protocols. Key changes:  <\/p>\n<ul>\n<li class=\"l\"> Experimental support has been added for the combined digital signature scheme &#171;mldsa44-ed25519&#187;, which combines the post-quantum algorithm ML-DSA 44 and the Ed25519 elliptic curve-based algorithm. To enable support, &#171;mldsa44-ed25519&#187; should be added to the HostKeyAlgorithms and PubkeyAcceptedAlgorithms directives. You can use the command &#171;ssh-keygen -t mldsa44-ed25519&#187; to generate keys.\n<li class=\"l\"> A new implementation of the pattern matching system has been deployed in ssh and sshd, based on a non-deterministic finite automaton and not susceptible to the exponential growth problem of computational complexity when using patterns containing many &#171;*&#187; characters.\n<li class=\"l\"> The behavior of the Linux builds of sshd with system call filtering enabled via seccomp has been changed. Previously, a failure when activating SECCOMP or NO_NEW_PRIVS on Linux systems that do not support them would result in a logged warning and continue running without isolation, but now it will cause a crash.\n<li class=\"l\"> When using the &#171;sshd -G&#187; option, the configuration dump now records directives using both uppercase and lowercase letters, instead of only in lowercase (i.e. &#171;PubkeyAuthentication&#187; instead of &#171;pubkeyauthentication&#187;).\n<li class=\"l\"> The behavior of ssh and sshd has been brought in line with RFC 4253: sending messages unrelated to key exchange during a key re-exchange will now result in the connection being terminated. Previously, attackers could carry out a DoS attack by continually sending unrelated messages during key exchange, which were buffered and <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/en\/server\/dts-dronten\/\" title=\"server\" data-wpil-keyword-link=\"linked\">server<\/a> used memory.            <\/ul>\n<p>Several security issues have been resolved:  <\/p>\n<ul>\n<li class=\"l\"> In the ssh utility, a potential use-after-free memory access issue has been fixed when accessing a malicious <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/en\/server\/dts-shicago\/\" title=\"server\" data-wpil-keyword-link=\"linked\">server<\/a>. The issue is exploited by changing the host key during the key re-exchange.\n<li class=\"l\"> A vulnerability in sftp allows a file to be uploaded to a different directory when connecting to a malicious server using a command in the form &#171;sftp host:\u200b\/\u200bpath .&#187;.\n<li class=\"l\"> A vulnerability in scp allows copying files between two external <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/en\/server\/dts-dusseldorf\/\" title=\"servers\" data-wpil-keyword-link=\"linked\">servers<\/a>one of which is under the attacker's control, to organize file writing in the parent directory located one level below the target directory.\n<li class=\"l\"> An issue in sshd has been fixed that appeared when using the internal implementation of the SFTP server (&#171;internal-sftp&#187;), which is disabled by default. This problem was related to truncating long command line sequences after the 9th argument, leading to the omission of subsequent arguments. Consequently, options related to security could potentially be discarded.\n<li class=\"l\"> In sshd, a flaw has been fixed where the directive &#171;DisableForwarding=yes&#187; did not disable the ability to create tunnels allowed by the &#171;PermitTunnel=yes&#187; option (which is not set by default).\n<li class=\"l\"> In sshd, an issue has been addressed that could be exploited to initiate a denial-of-service condition before authentication occurs with GSSAPIAuthentication directive enabled in the settings (disabled by default). This issue is not blocked by the &#171;MaxAuthTries&#187; limit but falls under the restrictions of &#171;PerSourcePenalties&#187;.\n<li class=\"l\"> Fixes have been made in sshd to ensure that a minimal delay is not always added between authentication attempts.        <\/ul>\n<p>Source: <a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65854\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0442\u0440\u0451\u0445 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 10.4, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430\u043c SSH 2.0 \u0438 SFTP. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043a\u043e\u043c\u0431\u0438\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0441\u0445\u0435\u043c\u044b \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u043f\u043e\u0434\u043f\u0438\u0441\u0435\u0439 &#171;mldsa44-ed25519&#187;, \u0441\u043e\u0447\u0435\u0442\u0430\u044e\u0449\u0438\u0439 \u043f\u043e\u0441\u0442\u043a\u0432\u0430\u043d\u0442\u043e\u0432\u044b\u0439 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c ML-DSA 44 \u0438 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c \u043d\u0430 \u0431\u0430\u0437\u0435 \u044d\u043b\u043b\u0438\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u043a\u0440\u0438\u0432\u044b\u0445 Ed25519. \u0414\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c &#171;mldsa44-ed25519&#187; \u0432 \u0434\u0438\u0440\u0435\u043a\u0442\u0438\u0432\u044b HostKeyAlgorithms \u0438 PubkeyAcceptedAlgorithms. [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-182500","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0442\u0440\u0451\u0445 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 10.4, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 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