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: 7.5EPSS: 0%CPEs: 8EXPL: 0CVE-2022-27191 – golang: crash in a golang.org/x/crypto/ssh server
https://notcve.org/view.php?id=CVE-2022-27191
The golang.org/x/crypto/ssh package before 0.0.0-20220314234659-1baeb1ce4c0b for Go allows an attacker to crash a server in certain circumstances involving AddHostKey. El paquete golang.org/x/crypto/ssh anterior a 0.0.0-20220314234659-1baeb1ce4c0b para Go permite a un atacante bloquear un servidor en ciertas circunstancias que implican AddHostKey A broken cryptographic algorithm flaw was found in golang.org/x/crypto/ssh. This issue causes a client to fail authentication with RSA keys to servers that reject signature algorithms based on SHA-2, enabling an attacker to crash the server, resulting in a loss of availability. • https://groups.google.com/g/golang-announce https://groups.google.com/g/golang-announce/c/-cp44ypCT5s https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLUJZV3HBP56ADXU6QH2V7RNYUPMVBXQ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZ3S7LB65N54HXXBCB67P4TTOHTNPP5O https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HHGBEGJ54DZZGTXFUQNS7ZIG3E624YAF https://lists.fedoraproject.org/archives/list/package-announce%40lis • CWE-327: Use of a Broken or Risky Cryptographic Algorithm •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2021-43565 – golang.org/x/crypto: empty plaintext packet causes panic
https://notcve.org/view.php?id=CVE-2021-43565
The x/crypto/ssh package before 0.0.0-20211202192323-5770296d904e of golang.org/x/crypto allows an attacker to panic an SSH server. El paquete x/crypto/ssh versiones anteriores a 0.0.0-20211202192323-5770296d904e, de golang.org/x/crypto permite a un atacante entrar en pánico en un servidor SSH. There's an input validation flaw in golang.org/x/crypto's readCipherPacket() function. An unauthenticated attacker who sends an empty plaintext packet to a program linked with golang.org/x/crypto/ssh could cause a panic, potentially leading to denial of service. • https://groups.google.com/forum/#%21forum/golang-announce https://groups.google.com/g/golang-announce/c/2AR1sKiM-Qs https://access.redhat.com/security/cve/CVE-2021-43565 https://bugzilla.redhat.com/show_bug.cgi?id=2030787 • CWE-20: Improper Input Validation •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2020-29652 – golang: crypto/ssh: crafted authentication request can lead to nil pointer dereference
https://notcve.org/view.php?id=CVE-2020-29652
A nil pointer dereference in the golang.org/x/crypto/ssh component through v0.0.0-20201203163018-be400aefbc4c for Go allows remote attackers to cause a denial of service against SSH servers. Una desreferencia de puntero null en el componente golang.org/x/crypto/ssh versiones hasta v0.0.0-20201203163018-be400aefbc4c para Go, permite a atacantes remotos causar una denegación de servicio contra servidores SSH A null pointer dereference vulnerability was found in golang. When using the library's ssh server without specifying an option for GSSAPIWithMICConfig, it is possible for an attacker to craft an ssh client connection using the `gssapi-with-mic` authentication method and cause the server to panic resulting in a denial of service. The highest threat from this vulnerability is to system availability. • https://go-review.googlesource.com/c/crypto/+/278852 https://groups.google.com/g/golang-announce/c/ouZIlBimOsE?pli=1 https://lists.apache.org/thread.html/r68032132c0399c29d6cdc7bd44918535da54060a10a12b1591328bff%40%3Cnotifications.skywalking.apache.org%3E https://access.redhat.com/security/cve/CVE-2020-29652 https://bugzilla.redhat.com/show_bug.cgi?id=1908883 • CWE-476: NULL Pointer Dereference •
CVSS: 7.5EPSS: 24%CPEs: 2EXPL: 3CVE-2020-9283 – Go SSH servers 0.0.2 - Denial of Service (PoC)
https://notcve.org/view.php?id=CVE-2020-9283
golang.org/x/crypto before v0.0.0-20200220183623-bac4c82f6975 for Go allows a panic during signature verification in the golang.org/x/crypto/ssh package. A client can attack an SSH server that accepts public keys. Also, a server can attack any SSH client. golang.org/x/crypto versiones anteriores a v0.0.0-20200220183623-bac4c82f6975, para Go permite un pánico durante la comprobación de firma en el paquete golang.org/x/crypto/ssh. Un cliente puede atacar un servidor SSH que acepte claves públicas. Además, un servidor puede atacar a cualquier cliente SSH. • https://www.exploit-db.com/exploits/48121 https://github.com/brompwnie/CVE-2020-9283 http://packetstormsecurity.com/files/156480/Go-SSH-0.0.2-Denial-Of-Service.html https://groups.google.com/forum/#%21topic/golang-announce/3L45YRc91SY https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html https://lists.debian.org/debian-lts-announce/2020/11/msg00027.html https://lists.debian.org/debian-lts-announce/2020/11/msg00031.html https://lists.debian.org/debian-lts-announce • CWE-130: Improper Handling of Length Parameter Inconsistency CWE-347: Improper Verification of Cryptographic Signature •