CVSS: 5.9EPSS: 96%CPEs: 79EXPL: 1CVE-2023-48795 – ssh: Prefix truncation attack on Binary Packet Protocol (BPP)
https://notcve.org/view.php?id=CVE-2023-48795
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 connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com MAC algorithms. This also affects 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 0.17.0, libssh before 0.10.6, libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7 before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0, TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before 14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before 9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for Node.js, the thrussh library before 0.35.1 for Rust, and the Russh crate before 0.40.2 for Rust. • http://packetstormsecurity.com/files/176280/Terrapin-SSH-Connection-Weakening.html http://seclists.org/fulldisclosure/2024/Mar/21 http://www.openwall.com/lists/oss-security/2023/12/18/3 http://www.openwall.com/lists/oss-security/2023/12/19/5 http://www.openwall.com/lists/oss-security/2023/12/20/3 http://www.openwall.com/lists/oss-security/2024/03/06/3 http://www.openwall.com/lists/oss-security/2024/04/17/8 https://access.redhat.com/security/cve/cve-2023-48 • CWE-222: Truncation of Security-relevant Information CWE-354: Improper Validation of Integrity Check Value •
CVSS: 5.9EPSS: 0%CPEs: 3EXPL: 0CVE-2019-11840 – golang.org/x/crypto: Keystream loop in amd64 assembly when overflowing 32-bit counter
https://notcve.org/view.php?id=CVE-2019-11840
An issue was discovered in the supplementary Go cryptography library, golang.org/x/crypto, before v0.0.0-20190320223903-b7391e95e576. A flaw was found in the amd64 implementation of the golang.org/x/crypto/salsa20 and golang.org/x/crypto/salsa20/salsa packages. If more than 256 GiB of keystream is generated, or if the counter otherwise grows greater than 32 bits, the amd64 implementation will first generate incorrect output, and then cycle back to previously generated keystream. Repeated keystream bytes can lead to loss of confidentiality in encryption applications, or to predictability in CSPRNG applications. se descubrio un problema en Go cryptography libraries, también se conoce como golang-googlecode-go-crypto, anterior del 20-03-2019. Se encontró un fallo en la implementación de amd64 de golang.org/x/crypto/salsa20 y golang.org/x/crypto/salsa20/salsa. • https://bugzilla.redhat.com/show_bug.cgi?id=1691529 https://github.com/golang/go/issues/30965 https://go.googlesource.com/crypto/+/b7391e95e576cacdcdd422573063bc057239113d https://groups.google.com/forum/#%21msg/golang-announce/tjyNcJxb2vQ/n0NRBziSCAAJ https://lists.debian.org/debian-lts-announce/2019/06/msg00029.html https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html https://lists.debian.org/debian-lts-announce/2020/11/msg00016.html https://lists.debian.org/debian-lts-anno • CWE-330: Use of Insufficiently Random Values •
CVSS: 8.1EPSS: 0%CPEs: 1EXPL: 0CVE-2017-3204
https://notcve.org/view.php?id=CVE-2017-3204
The Go SSH library (x/crypto/ssh) by default does not verify host keys, facilitating man-in-the-middle attacks. Default behavior changed in commit e4e2799 to require explicitly registering a hostkey verification mechanism. La librería Go SSH (x/crypto/ssh) por defecto no verifica las claves del host, facilitando ataques man-in-the-middle. El comportamiento predeterminado cambió en commit e4e2799 para requerir el registro explícito de un mecanismo de verificación de hostkey. • http://www.securityfocus.com/bid/97481 https://bridge.grumpy-troll.org/2017/04/golang-ssh-security https://github.com/golang/crypto/commit/e4e2799dd7aab89f583e1d898300d96367750991 https://github.com/golang/go/issues/19767 https://godoc.org/golang.org/x/crypto/ssh • CWE-310: Cryptographic Issues •
CVSS: 7.8EPSS: 0%CPEs: 12EXPL: 0CVE-2011-0766
https://notcve.org/view.php?id=CVE-2011-0766
The random number generator in the Crypto application before 2.0.2.2, and SSH before 2.0.5, as used in the Erlang/OTP ssh library before R14B03, uses predictable seeds based on the current time, which makes it easier for remote attackers to guess DSA host and SSH session keys. El generador de números aleatorios de la aplicación Crypto en versiones anteriores a la 2.0.2.2, y SSH anteriores a 2.0.5, como es usado en la librería Erlang/OTP ssh en versiones anteriores a la R14B03, utiliza semillas predecibles basadas en la fecha actual, lo que facilita a atacantes remotos adivinar el host DSA y las claves de sesión SSH. • http://secunia.com/advisories/44709 http://www.kb.cert.org/vuls/id/178990 http://www.securityfocus.com/bid/47980 https://github.com/erlang/otp/commit/f228601de45c5b53241b103af6616453c50885a5 • CWE-310: Cryptographic Issues •