OESA-2025-1439 (CVE-2025-26465)
Vulnerability from osv_openeuler – Published: 2025-04-18 11:08 – Updated: 2026-08-06 11:08 – Source websiteOpenSSH 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)
In sshd in OpenSSH before 10.0, the DisableForwarding directive does not adhere to the documentation stating that it disables X11 and agent forwarding.(CVE-2025-32728)
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"aarch64": [
"openssh-9.3p2-8.oe2403.aarch64.rpm",
"openssh-askpass-9.3p2-8.oe2403.aarch64.rpm",
"openssh-clients-9.3p2-8.oe2403.aarch64.rpm",
"openssh-debuginfo-9.3p2-8.oe2403.aarch64.rpm",
"openssh-debugsource-9.3p2-8.oe2403.aarch64.rpm",
"openssh-keycat-9.3p2-8.oe2403.aarch64.rpm",
"openssh-server-9.3p2-8.oe2403.aarch64.rpm",
"pam_ssh_agent_auth-0.10.4-4.8.oe2403.aarch64.rpm"
],
"noarch": [
"openssh-help-9.3p2-8.oe2403.noarch.rpm"
],
"src": [
"openssh-9.3p2-8.oe2403.src.rpm"
],
"x86_64": [
"openssh-9.3p2-8.oe2403.x86_64.rpm",
"openssh-askpass-9.3p2-8.oe2403.x86_64.rpm",
"openssh-clients-9.3p2-8.oe2403.x86_64.rpm",
"openssh-debuginfo-9.3p2-8.oe2403.x86_64.rpm",
"openssh-debugsource-9.3p2-8.oe2403.x86_64.rpm",
"openssh-keycat-9.3p2-8.oe2403.x86_64.rpm",
"openssh-server-9.3p2-8.oe2403.x86_64.rpm",
"pam_ssh_agent_auth-0.10.4-4.8.oe2403.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS",
"name": "openssh",
"purl": "pkg:rpm/openEuler/openssh\u0026distro=openEuler-24.03-LTS"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.3p2-8.oe2403"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "Medium"
},
"details": "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.\r\n\r\nSecurity Fix(es):\n\nA 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\u0026apos;s memory resource first, turning the attack complexity high.(CVE-2025-26465)\n\nIn sshd in OpenSSH before 10.0, the DisableForwarding directive does not adhere to the documentation stating that it disables X11 and agent forwarding.(CVE-2025-32728)",
"id": "OESA-2025-1439",
"modified": "2026-08-06T11:08:32Z",
"published": "2025-04-18T11:08:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1439"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-26465"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-32728"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "openssh security update",
"upstream": [
"CVE-2025-26465",
"CVE-2025-32728"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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