Fedora 38 : libssh (2023-55800423a8)

The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-55800423a8 advisory. Fix regression in IPv6 hosntames parsing ---- New upstream release fixing CVE-2023-48795, CVE-2023-6004, CVE-2023-6918 Tenable has extracted the...

Mageia: Security Advisory (MGASA-2024-0003)

The remote host is missing an update for the SPDX-FileCopyrightText: 2024 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...

SUSE SLED15 / SLES15 / openSUSE 15 Security Update : libssh2_org (SUSE-SU-2024:0006-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2024:0006-1 advisory. - CVE-2023-48795: Fixed prefix truncation breaking ssh channel integrity Terrapin Attack bsc1218127...

New Terrapin Flaw Could Let Attackers Downgrade SSH Protocol Security

Security researchers from Ruhr University Bochum have discovered a vulnerability in the Secure Shell SSH cryptographic network protocol that could allow an attacker to downgrade the connection's security by breaking the integrity of the secure channel. Called Terrapin CVE-2023-48795, CVSS score:...

[SECURITY] Fedora 39 Update: python-asyncssh-2.14.2-1.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...

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 : 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...

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...

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...

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...

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 -- 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...

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...

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...

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...