An update for openssh is now available for openEuler-24.03-LTS-SP1 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2025-1314 Final 1.0 1.0 2025-03-21 Initial 2025-03-21 2025-03-21 openEuler SA Tool V1.0 2025-03-21 openssh security update An update for openssh is now available for openEuler-24.03-LTS-SP1 OpenSSH is the premier connectivity tool for remote login with the SSH protocol. \ It encrypts all traffic to eliminate eavesdropping, connection hijacking, and \ other attacks. In addition, OpenSSH provides a large suite of secure tunneling \ capabilities, several authentication methods, and sophisticated configuration options. Security Fix(es): A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.(CVE-2025-26465) A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack.(CVE-2025-26466) An update for openssh is now available for openEuler-24.03-LTS-SP1. openEuler Security has rated this update as having a security impact of medium. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Medium openssh https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1314 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-26465 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-26466 https://nvd.nist.gov/vuln/detail/CVE-2025-26465 https://nvd.nist.gov/vuln/detail/CVE-2025-26466 openEuler-24.03-LTS-SP1 openssh-9.6p1-5.oe2403sp1.aarch64.rpm openssh-askpass-9.6p1-5.oe2403sp1.aarch64.rpm openssh-clients-9.6p1-5.oe2403sp1.aarch64.rpm openssh-debuginfo-9.6p1-5.oe2403sp1.aarch64.rpm openssh-debugsource-9.6p1-5.oe2403sp1.aarch64.rpm openssh-keycat-9.6p1-5.oe2403sp1.aarch64.rpm openssh-server-9.6p1-5.oe2403sp1.aarch64.rpm pam_ssh_agent_auth-0.10.4-4.5.oe2403sp1.aarch64.rpm openssh-9.6p1-5.oe2403sp1.src.rpm openssh-9.6p1-5.oe2403sp1.x86_64.rpm openssh-askpass-9.6p1-5.oe2403sp1.x86_64.rpm openssh-clients-9.6p1-5.oe2403sp1.x86_64.rpm openssh-debuginfo-9.6p1-5.oe2403sp1.x86_64.rpm openssh-debugsource-9.6p1-5.oe2403sp1.x86_64.rpm openssh-keycat-9.6p1-5.oe2403sp1.x86_64.rpm openssh-server-9.6p1-5.oe2403sp1.x86_64.rpm pam_ssh_agent_auth-0.10.4-4.5.oe2403sp1.x86_64.rpm openssh-help-9.6p1-5.oe2403sp1.noarch.rpm A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high. 2025-03-21 CVE-2025-26465 openEuler-24.03-LTS-SP1 Medium 6.8 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N openssh security update 2025-03-21 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1314 A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack. 2025-03-21 CVE-2025-26466 openEuler-24.03-LTS-SP1 Medium 5.9 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H openssh security update 2025-03-21 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1314