Vulnerabilidades de OpenSSH

OpenSSH

authorized_keys restrict does not apply to tunnel forwarding

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OpenSSH

A flaw was found in OpenSSH. With GSSAPI authentication enabled, a failed GSSAPI attempt can leave delegated credentials stored for the connection even though user authorization did not succeed. A…

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OpenSSH

A flaw was found in OpenSSH. After compression is negotiated, a compressed payload can expand past the maximum supported packet size because the inflate loop does not stop at that limit. Memory use…

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OpenSSH

A flaw was found in OpenSSH. During an sftp copy, a malicious server can supply an empty name, a slash-only path, or a ".." basename that sftp uses as the local destination, writing outside the…

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OpenSSH

A flaw was found in OpenSSH. A username entered on the ssh command line can still contain '$' or a non-trailing backslash. When a configuration expands %u inside ProxyCommand or Match exec, those…

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OpenSSH

A flaw was found in OpenSSH. When compression is negotiated, channels on the same connection share one LZ77 dictionary. A peer who can write on one channel can recover plaintext from another channel…

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OpenSSH

In ssh in OpenSSH before 10.6, a $ or \ character can occur in a command-line username, leading to injection.

Corregida en Debian 14, Ubuntu 22.04, Ubuntu 24.04, Ubuntu 26.04 y Ubuntu 26.10.

OpenSSH

In sftp in OpenSSH before 10.6, a server can trigger directory traversal (causing files to be written to unintended locations) during a recursive copy operation.

Corregida en Debian 14, Ubuntu 22.04, Ubuntu 24.04, Ubuntu 26.04 y Ubuntu 26.10.

OpenSSH

In sshd in OpenSSH before 10.6, credentials can incorrectly persist after failure of a GSSAPIAuthentication authentication attempt.

Corregida en Debian 14, Ubuntu 22.04, Ubuntu 24.04, Ubuntu 26.04 y Ubuntu 26.10.

OpenSSH

In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.

Corregida en Debian 14, Ubuntu 22.04, Ubuntu 24.04, Ubuntu 26.04 y Ubuntu 26.10.

OpenSSH

In sshd and ssh in OpenSSH before 10.6, an LZ77 dictionary coder can be used even though this is contraindicated by the arXiv 2609.07709 "Crossing the Streams" findings.

Corregida en Debian 14, Ubuntu 22.04, Ubuntu 24.04, Ubuntu 26.04 y Ubuntu 26.10.

OpenSSH

In ssh-keygen in OpenSSH before 10.6, certificates could have incorrect expiration times because of Daylight Saving mishandling. There can be a slightly more severe effect on users in certain…

Corregida en Debian 14, Ubuntu 22.04, Ubuntu 24.04, Ubuntu 26.04 y Ubuntu 26.10.

OpenSSH

In sshd and ssh in OpenSSH before 10.6, there is no check for whether the maximum packet length is exceeded during decompression of highly compressed data.

Corregida en Debian 14, Ubuntu 22.04, Ubuntu 24.04, Ubuntu 26.04 y Ubuntu 26.10.

OpenSSH

In sshd in OpenSSH before 10.6, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not, a different vulnerability than CVE-2026-73283.

Corregida en Debian 14, Ubuntu 22.04, Ubuntu 24.04, Ubuntu 26.04 y Ubuntu 26.10.

OpenSSH

In sshd in OpenSSH before 10.6, the value "none" for a configuration option is sometimes interpreted as a filename but was intended to mean that a feature is disabled.

Corregida en Debian 14, Ubuntu 22.04, Ubuntu 24.04, Ubuntu 26.04 y Ubuntu 26.10.

OpenSSH

In sshd in OpenSSH through 10.6, in certain environments such as QNX 6 and SCO OpenServer 5, sshd-session can unexpectedly have root privileges. This is related to the GatewayPorts and…

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OpenSSH

openssh vulnerabilities

Corregida en Ubuntu 22.04, Ubuntu 24.04 y Ubuntu 26.04.

OpenSSH

In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent.

Corregida en Ubuntu 22.04, Ubuntu 24.04 y Ubuntu 26.04.

OpenSSH

In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not.

Corregida en Ubuntu 22.04, Ubuntu 24.04 y Ubuntu 26.04.

OpenSSH

Vulnerabilidades de openssh

Corregida en Ubuntu 22.04, Ubuntu 24.04 y Ubuntu 26.04.