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openssh: Machine-in-the-middle attack if VerifyHostKeyDNS is enabled

🗓️ 13 May 2025 08:40:48Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 8 Views

OpenSSH with Verify Host Key DNS enabled enables a memory exhaustion based man in the middle attack during host key verification.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
0day.today		OpenSSH 9.9p1 Denial of Service / Man-In-The-Middle Vulnerability
18 Feb 202500:00
–zdt
IBM Security Bulletins		Security Bulletin: Vulnerability in openssh (CVE-2025-26465) affects Power HMC.
3 Feb 202606:02
–ibm
IBM Security Bulletins		Security Bulletin:Vulnerability in OpenSSH affects IBM Netezza Appliance
17 Dec 202513:28
–ibm
IBM Security Bulletins		Security Bulletin: IBM i is vulnerable to a machine-in-the-middle attack due to mishandling error codes when verifying the host key by OpenSSH. [CVE-2025-26465]
14 May 202514:58
–ibm
IBM Security Bulletins		Security Bulletin: AIX is vulnerable to a denial of service (CVE-2025-26466) and a machine-in-the-middle attack (CVE-2025-26465) due to OpenSSH
17 Mar 202522:11
–ibm
IBM Security Bulletins		Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to a machine-in-the-middle attack in OpenSSH [CVE-2025-26465]
28 Aug 202515:21
–ibm
IBM Security Bulletins		Security Bulletin: Security vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify Access
12 Jan 202623:03
–ibm
GithubExploit		Exploit for Detection of Error Condition Without Action in Openbsd Openssh
18 Feb 202516:53
–githubexploit
GithubExploit		Exploit for Allocation of Resources Without Limits or Throttling in Openbsd Openssh
23 Jun 202513:00
–githubexploit
FreeBSD		FreeBSD -- Multiple vulnerabilities in OpenSSH
21 Feb 202500:00
–freebsd
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9aarch64openssh0:8.7p1-45.el9openssh-0:8.7p1-45.el9.aarch64.rpm
Red Hat Enterprise Linux9ppc64leopenssh0:8.7p1-45.el9openssh-0:8.7p1-45.el9.ppc64le.rpm
Red Hat Enterprise Linux9s390xopenssh0:8.7p1-45.el9openssh-0:8.7p1-45.el9.s390x.rpm
Red Hat Enterprise Linux9x86_64openssh0:8.7p1-45.el9openssh-0:8.7p1-45.el9.x86_64.rpm
Red Hat Enterprise Linux9aarch64openssh-askpass0:8.7p1-45.el9openssh-askpass-0:8.7p1-45.el9.aarch64.rpm
Red Hat Enterprise Linux9ppc64leopenssh-askpass0:8.7p1-45.el9openssh-askpass-0:8.7p1-45.el9.ppc64le.rpm
Red Hat Enterprise Linux9s390xopenssh-askpass0:8.7p1-45.el9openssh-askpass-0:8.7p1-45.el9.s390x.rpm
Red Hat Enterprise Linux9x86_64openssh-askpass0:8.7p1-45.el9openssh-askpass-0:8.7p1-45.el9.x86_64.rpm
Red Hat Enterprise Linux9aarch64openssh-askpass-debuginfo0:8.7p1-45.el9openssh-askpass-debuginfo-0:8.7p1-45.el9.aarch64.rpm
Red Hat Enterprise Linux9ppc64leopenssh-askpass-debuginfo0:8.7p1-45.el9openssh-askpass-debuginfo-0:8.7p1-45.el9.ppc64le.rpm
Rows per page

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14 Jul 2026 14:13Current
7.1High risk
Vulners AI Score7.1
CVSS 3.16.8
EPSS0.06997
SSVC
CWE-390
OpenSSHVerify Host Key DNSHost key verificationMemory exhaustionMan in the middle
8