CVSS: 8.1EPSS: 0%CPEs: 54EXPL: 44CVE-2024-6387 – Openssh: regresshion - race condition in ssh allows rce/dos
https://notcve.org/view.php?id=CVE-2024-6387
A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period. Se encontró una condición de ejecución del controlador de señales en el servidor de OpenSSH (sshd), donde un cliente no se autentica dentro de los segundos de LoginGraceTime (120 de forma predeterminada, 600 en versiones anteriores de OpenSSH), luego se llama al controlador SIGALRM de sshd de forma asincrónica. Sin embargo, este controlador de señales llama a varias funciones que no son seguras para señales asíncronas, por ejemplo, syslog(). • https://github.com/l0n3m4n/CVE-2024-6387 https://github.com/thegenetic/CVE-2024-6387-exploit https://github.com/d0rb/CVE-2024-6387 https://github.com/devarshishimpi/CVE-2024-6387-Check https://github.com/AiGptCode/ssh_exploiter_CVE-2024-6387 https://github.com/Symbolexe/CVE-2024-6387 https://github.com/xonoxitron/regreSSHion https://github.com/PrincipalAnthony/CVE-2024-6387-Updated-x64bit https://github.com/4lxprime/regreSSHive https://github.com/shamo0/CVE-2024-6387_PoC https:&# • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-364: Signal Handler Race Condition •
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: 6.5EPSS: 0%CPEs: 4EXPL: 12CVE-2023-51385 – openssh: potential command injection via shell metacharacters
https://notcve.org/view.php?id=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 host name. En ssh en OpenSSH anterior a 9.6, la inyección de comandos del sistema operativo puede ocurrir si un nombre de usuario o nombre de host tiene metacaracteres de shell, y un token de expansión hace referencia a este nombre en ciertas situaciones. Por ejemplo, un repositorio Git que no es de confianza puede tener un submódulo con metacaracteres de shell en un nombre de usuario o nombre de host. A flaw was found in OpenSSH. • https://github.com/WOOOOONG/CVE-2023-51385 https://github.com/MiningBot-eth/CVE-2023-51385-exploit https://github.com/julienbrs/exploit-CVE-2023-51385 https://github.com/julienbrs/malicious-exploit-CVE-2023-51385 https://github.com/Le1a/CVE-2023-51385 https://github.com/thinkliving2020/CVE-2023-51385- https://github.com/farliy-hacker/CVE-2023-51385 https://github.com/farliy-hacker/CVE-2023-51385-save https://github.com/2048JiaLi/CVE-2023-51385 https://github.com/Sonicrrrr/ • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') •
CVSS: 9.8EPSS: 7%CPEs: 5EXPL: 8CVE-2023-38408 – openssh: Remote code execution in ssh-agent PKCS#11 support
https://notcve.org/view.php?id=CVE-2023-38408
The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if an agent is forwarded to an attacker-controlled system. (Code in /usr/lib is not necessarily safe for loading into ssh-agent.) NOTE: this issue exists because of an incomplete fix for CVE-2016-10009. La característica PKCS#11 en ssh-agent en OpenSSH anterior a 9.3p2 tiene una ruta de búsqueda insuficientemente confiable, lo que lleva a la ejecución remota de código si un agente se reenvía a un sistema controlado por un atacante. (El código en /usr/lib no es necesariamente seguro para cargar en ssh-agent). • https://github.com/kali-mx/CVE-2023-38408 https://github.com/LucasPDiniz/CVE-2023-38408 https://github.com/classic130/CVE-2023-38408 https://github.com/mrtacojr/CVE-2023-38408 https://github.com/wxrdnx/CVE-2023-38408 http://packetstormsecurity.com/files/173661/OpenSSH-Forwarded-SSH-Agent-Remote-Code-Execution.html http://www.openwall.com/lists/oss-security/2023/07/20/1 http://www.openwall.com/lists/oss-security/2023/07/20/2 http://www.openwall.com/lists/oss-security/ • CWE-94: Improper Control of Generation of Code ('Code Injection') CWE-428: Unquoted Search Path or Element •
CVSS: 3.7EPSS: 0%CPEs: 4EXPL: 0CVE-2021-36368
https://notcve.org/view.php?id=CVE-2021-36368
An issue was discovered in OpenSSH before 8.9. If a client is using public-key authentication with agent forwarding but without -oLogLevel=verbose, and an attacker has silently modified the server to support the None authentication option, then the user cannot determine whether FIDO authentication is going to confirm that the user wishes to connect to that server, or that the user wishes to allow that server to connect to a different server on the user's behalf. NOTE: the vendor's position is "this is not an authentication bypass, since nothing is being bypassed. ** EN DISPUTA ** Se ha detectado un problema en OpenSSH versiones anteriores a 8.9. Si un cliente está usando autenticación de clave pública con reenvío de agentes pero sin -oLogLevel=verbose, y un atacante ha modificado silenciosamente el servidor para que soporte la opción de autenticación None, entonces el usuario no puede determinar si la autenticación FIDO va a confirmar que el usuario desea conectarse a ese servidor, o que el usuario desea permitir que ese servidor sea conectado a un servidor diferente en nombre del usuario. NOTA: la posición del proveedor es que "esto no es una omisión de la autenticación, ya que no está omitiéndose nada" • https://bugzilla.mindrot.org/show_bug.cgi?id=3316 https://docs.ssh-mitm.at/trivialauth.html https://github.com/openssh/openssh-portable/pull/258 https://security-tracker.debian.org/tracker/CVE-2021-36368 https://www.openssh.com/security.html • CWE-287: Improper Authentication •