Terrapin Attack Downgrading the Fortresses of SSH

Summary: The Terrapin attack, a cryptographic exploit targeting the widely adopted SSH protocol, poses a threat to the security of over 15 million servers dispersed across the Internet. This vulnerability enables attackers to compromise the security of established connections by truncating the...

[SECURITY] [DLA 3694-1] openssh security update

Debian LTS Advisory DLA-3694-1 [email protected] https://www.debian.org/lts/security/ Santiago Ruano Rincón December 25, 2023 https://wiki.debian.org/LTS Package : openssh Version : 1:7.9p1-10+deb10u4 CVE ID : CVE-2021-41617 CVE-2023-48795 CVE-2023-51385 Debian Bug : 995130 Several...

Debian: Security Advisory (DSA-5586-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Debian: Security Advisory (DSA-5588-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

[SECURITY] [DSA 5588-1] putty security update

------------------------------------------------------------------------- Debian Security Advisory DSA-5588-1 [email protected] https://www.debian.org/security/ Salvatore Bonaccorso December 24, 2023 https://www.debian.org/security/faq -...

SUSE SLES12 Security Update : libssh2_org (SUSE-SU-2023:4946-1)

The remote SUSE Linux SLES12 / SLESSAP12 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4946-1 advisory. - CVE-2023-48795: Fixed prefix truncation breaking ssh channel integrity Terrapin Attack bsc1218127. Tenable has extracted the preceding...

SUSE SLES12 Security Update : openssh (SUSE-SU-2023:4903-1)

The remote SUSE Linux SLES12 / SLESSAP12 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4903-1 advisory. - CVE-2023-48795: Fixed prefix truncation breaking ssh channel integrity bsc1217950. Tenable has extracted the preceding description block...

Ubuntu: Security Advisory (USN-6561-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Ubuntu: Security Advisory (USN-6560-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

USN-6561-1: libssh vulnerability

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...

Prefix Truncation Attack (Terrapin Attack)

libssh is vulnerable to Terrapin attack. The vulnerability is due to mishandling of the handshake phase and sequence numbers in the SSH Binary Packet Protocol BPP with certain OpenSSH extensions. This allows an attacker to bypass integrity checks and omit packets during extension negotiation, and...

FreeBSD-SA-23:19.openssh

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-23:19.openssh Security Advisory The FreeBSD Project Topic: Prefix Truncation Attack in the SSH protocol Category: contrib Module: openssh Announced: 2023-12-19...

FreeBSD -- Prefix Truncation Attack in the SSH protocol

Problem Description: The SSH protocol executes an initial handshake between the server and the client. This protocol handshake includes the possibility of several extensions allowing different options to be selected. Validation of the packets in the handshake is done through sequence numbers...

GHSA-45X7-PX36-X8W8 Prefix Truncation Attack against ChaCha20-Poly1305 and Encrypt-then-MAC aka Terrapin

Summary Terrapin is a prefix truncation attack targeting the SSH protocol. More precisely, Terrapin breaks the integrity of SSH's secure channel. By carefully adjusting the sequence numbers during the handshake, an attacker can remove an arbitrary amount of messages sent by the client or server a...

Prefix Truncation Attack against ChaCha20-Poly1305 and Encrypt-then-MAC aka Terrapin

Summary Terrapin is a prefix truncation attack targeting the SSH protocol. More precisely, Terrapin breaks the integrity of SSH's secure channel. By carefully adjusting the sequence numbers during the handshake, an attacker can remove an arbitrary amount of messages sent by the client or server a...

AZL-34906 CVE-2023-48795 affecting package kubevirt for versions less than 1.2.0-9

The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted from the extension negotiation message, and a client and server may consequently end up with a connecti...

AZL-32222 CVE-2023-48795 affecting package kubevirt for versions less than 0.59.0-27

The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted from the extension negotiation message, and a client and server may consequently end up with a connecti...

PT-2023-7786

Name of the Vulnerable Software and Affected Versions OpenSSH versions prior to 9.6 libssh2 versions through 1.11.0 Maverick Synergy Java SSH API before 3.1.0-SNAPSHOT Dropbear through 2022.83 Ssh before 5.1.1 in Erlang/OTP PuTTY before 0.80 AsyncSSH before 2.14.2 golang.org/x/crypto before 0.17....

Experts Uncover Passive Method to Extract Private RSA Keys from SSH Connections

A new study has demonstrated that it's possible for passive network attackers to obtain private RSA host keys from a vulnerable SSH server by observing when naturally occurring computational faults that occur while the connection is being established. The Secure Shell SSH protocol is a method for...

[SECURITY] Fedora 39 Update: python-asyncssh-2.14.1-1.fc39

Python 3 library for asynchronous client and server-side SSH communication. It uses the Python asyncio module and implements many SSH protocol features such as the various channels, SFTP, SCP, forwarding, session multiplexing over a connection and more...