Astra Linux – Vulnerabilities in paramiko, libssh, libssh2, erlang, openssh

The SSH transport protocol, with certain OpenSSH extensions, found in OpenSSH versions prior to 9.6 and other products, allows remote attackers to bypass integrity checks. As a result, some packets may be omitted from the extension negotiation message. Consequently, the client and server may end ...

Astra Linux – Vulnerability in OpenSSH

In OpenSSH versions prior to 10.3, command execution could occur through shell metacharacters within a username in a command line. This requires a scenario where the username on the command line is untrusted, and also requires non-default configurations of % in sshconfig...

Astra Linux – Vulnerability in OpenSSH

OpenSSH versions prior to 10.3 omitted the confirmation of connection multiplexing for proxy-mode multiplexing sessions...

Astra Linux – Vulnerability in OpenSSH

OpenSSH versions prior to 10.3 can use unintended ECDSA algorithms. Any listing of ECDSA algorithms in PubkeyAcceptedAlgorithms or HostbasedAcceptedAlgorithms is misinterpreted as meaning all ECDSA algorithms...

Astra Linux – Vulnerability in OpenSSH

In OpenSSH 6.2 through 8.x, prior to version 8.8, when certain non-default configurations were used, privilege escalation could occur because supplementary groups were not initialized as expected. Helper programs for AuthorizedKeysCommand and AuthorizedPrincipalsCommand might run with privileges...

Astra Linux – Vulnerability in OpenSSH

In OpenSSH versions 5.7 through 8.4, there is an observable discrepancy that can lead to an information leak during algorithm negotiations. This vulnerability allows man-in-the-middle attackers to target initial connection attempts, where no host key has been cached by the client. NOTE: Some...

Astra Linux – Vulnerability in OpenSSH

OpenSSH versions prior to 10.3 mishandle the authorizedkeys principals option in unusual scenarios where a principals list is used in conjunction with a Certificate Authority that utilizes comma characters...

Astra Linux – Vulnerability in OpenSSH

In OpenSSH versions prior to 10.3, a file downloaded using scp might be installed with setuid or setgid permissions, which contradicts some users’ expectations. This occurs when the download is performed as the root user with the -O legacy scp protocol option, and without the -p preserve mode...

Astra Linux – Vulnerability in OpenSSH

A vulnerability was discovered in OpenSSH when the VerifyHostKeyDNS option is enabled. A man-in-the-middle attack can be carried out by a malicious machine pretending to be a legitimate server. This issue arises due to the way OpenSSH handles error codes under certain conditions during the...

Astra Linux – Vulnerability in OpenSSH

The PKCS11 feature in ssh-agent in OpenSSH prior to version 9.3p2 has an insufficiently trustworthy search path, which can lead to remote code execution if the agent is forwarded to a system controlled by an attacker. The code located in /usr/lib is not necessarily safe for loading into ssh-agent...

Astra Linux – Vulnerability in OpenSSH

In OpenSSH 8.2, the scp client incorrectly sends duplicate responses to the server when a utimes system call fails. This allows a malicious, unprivileged user on the remote server to overwrite arbitrary files in the client’s download directory by creating a crafted subdirectory anywhere on the...

CVE-2026-73283 affecting package openssh for versions less than 9.8p1-10

CVE-2026-73283 affecting package openssh for versions less than 9.8p1-10. A patched version of the package is available...

CVE-2026-73281 affecting package openssh for versions less than 9.8p1-10

CVE-2026-73281 affecting package openssh for versions less than 9.8p1-10. A patched version of the package is available...

CVE-2026-73282 affecting package openssh for versions less than 9.8p1-10

CVE-2026-73282 affecting package openssh for versions less than 9.8p1-10. A patched version of the package is available...

Security Bulletin: Multiple vulnerabilities in OpenSSH affect AIX

Summary There are multiple vulnerabilities in OpenSSH used by AIX CVE-2026-73281,CVE-2026-73282, CVE-2026-73283. OpenSSH is used by AIX for remote login. Vulnerability Details CVEID:CVE-2026-73281 DESCRIPTION: In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intend...

openssh: OpenSSH: Use-after-free vulnerability during host key re-exchange on the client side

A flaw was found in OpenSSH. A remote attacker could exploit a use-after-free vulnerability on the client side when a server changes its host key during a key re-exchange. This could lead to high impact on confidentiality and integrity, and low impact on availability...

Important: Red Hat Security Advisory: openssh security update

An update for openssh is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

Multiple vulnerabilities in OpenSSH affect AIX

IBM SECURITY ADVISORY First Issued: Fri Sep 11 03:21:05 CDT 2026 The most recent version of this document is available here: https://aix.software.ibm.com/aix/efixes/security/opensshadvisory22.asc Security Bulletin: Multiple vulnerabilities in OpenSSH affect AIX...

RHEL 9 : openssh (RHSA-2026:66410)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:66410 advisory. OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary...

Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS / Pro Realtime 24.04 LTS : OpenSSH vulnerabilities (USN-8721-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS / Pro Realtime 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8721-1 advisory. It was discovered that OpenSSH's ssh-agent incorrectly handled interactions...