Prefix Truncation Attacks in SSH Specification (Terrapin Attack)

The remote SSH server is supporting an specific encryption algorithm or MAC. Parts of their SSH specification are vulnerable to a novel prefix truncation attack a.k.a. Terrapin attack. SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, a...

FreeBSD : putty -- add protocol extension against 'Terrapin attack' (91955195-9ebb-11ee-bc14-a703705db3a6)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 91955195-9ebb-11ee-bc14-a703705db3a6 advisory. - The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other...

openSUSE 15 Security Update : putty (openSUSE-SU-2023:0411-1)

The remote openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2023:0411-1 advisory. - The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity...

UBUNTU-CVE-2023-51384

In ssh-agent in OpenSSH before 9.6, certain destination constraints can be incompletely applied. When destination constraints are specified during addition of PKCS11-hosted private keys, these constraints are only applied to the first key, even if a PKCS11 token returns multiple keys...

UBUNTU-CVE-2023-51385

In ssh in OpenSSH before 9.6, OS command injection might occur if a user name or host name has shell metacharacters, and this name is referenced by an expansion token in certain situations. For example, an untrusted Git repository can have a submodule with shell metacharacters in a user name or...

Slackware Linux 14.0 / 14.1 / 14.2 / 15.0 / current proftpd Vulnerability (SSA:2023-354-01)

The version of proftpd installed on the remote host is prior to 1.3.8b. It is, therefore, affected by a vulnerability as referenced in the SSA:2023-354-01 advisory. - The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attacker...

CVE-2023-51385

In ssh in OpenSSH before 9.6, OS command injection might occur if a user name or host name has shell metacharacters, and this name is referenced by an expansion token in certain situations. For example, an untrusted Git repository can have a submodule with shell metacharacters in a user name or...

CVE-2023-51384

A flaw was found in OpenSSH. When specifying destination constraints while adding PKCS11-hosted private keys, the constraints only apply to the first key even in cases where the token returns multiple keys. Mitigation Mitigation for this issue is either not available or the currently available...

CVE-2023-51385

A flaw was found in OpenSSH. In certain circumstances, a remote attacker may be able to execute arbitrary OS commands by using expansion tokens, such as %u or %h, with user names or host names that contain shell metacharacters. Mitigation Mitigation for this issue is either not available or the...

USN-6560-1: OpenSSH vulnerabilities

Fabian Bäumer, Marcus Brinkmann, Jörg Schwenk discovered that the SSH protocol was vulnerable to a prefix truncation attack. If a remote attacker was able to intercept SSH communications, extension negotiation messages could be truncated, possibly leading to certain algorithms and features being...

SUSE-SU-2023:4905-1 Security update for openssh

This update for openssh fixes the following issues: - CVE-2023-48795: Fixed prefix truncation breaking ssh channel integrity bsc1217950...

SUSE-SU-2023:4904-1 Security update for openssh

This update for openssh fixes the following issues: - CVE-2023-48795: Fixed prefix truncation breaking ssh channel integrity bsc1217950...

SUSE-SU-2023:4903-1 Security update for openssh

This update for openssh fixes the following issues: - CVE-2023-48795: Fixed prefix truncation breaking ssh channel integrity bsc1217950...

SUSE-SU-2023:4902-1 Security update for openssh

This update for openssh fixes the following issues: - CVE-2023-48795: Fixed prefix truncation breaking ssh channel integrity bsc1217950. the following non-security bug was fixed: - Fix the 'no route to host' error when connecting via ProxyJump...

Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : libssh vulnerability (USN-6561-1)

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 host has packages installed that are affected by a vulnerability as referenced in the USN-6561-1 advisory. Fabian Bumer, Marcus Brinkmann, Jrg Schwenk discovered that the SSH protocol was vulnerable to a prefix truncation attack. If a remote...

Slackware Linux 14.2 / 15.0 / current libssh Multiple Vulnerabilities (SSA:2023-353-01)

The version of libssh installed on the remote host is prior to 0.10.6. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2023-353-01 advisory. - The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote...

Medium: openssh

Issue Overview: AWS is aware of CVE-2023-48795, also known as Terrapin, which is found in the SSH protocol and affects SSH channel integrity. A protocol extension has been introduced by OpenSSH which needs to be applied to both the client and the server in order to address this issue. We recommen...

Vulnerability fixed in OpenSSH

A vulnerability has been fixed in OpenSSH. A malicious party could potentially use a Man-in-the-Middle attack to weaken the connection between a client and server and thus gain access to the data transmitted over this connection. This Man-in-the-Middle attack has been given the name "Terrapin...

Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : OpenSSH vulnerabilities (USN-6560-1)

The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.04 / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6560-1 advisory. Fabian Bumer, Marcus Brinkmann, Jrg Schwenk discovered that the SSH protocol was vulnerable to a prefix truncation attack. If...

GO-2023-2402 Man-in-the-middle attacker can compromise integrity of secure channel in golang.org/x/crypto

A protocol weakness allows a MITM attacker to compromise the integrity of the secure channel before it is established, allowing the attacker to prevent transmission of a number of messages immediately after the secure channel is established without either side being aware. The impact of this atta...