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CVSS: 7.0EPSS: 0%CPEs: 18EXPL: 0

26 Sep 2021 — sshd in OpenSSH 6.2 through 8.x before 8.8, when certain non-default configurations are used, allows privilege escalation because supplemental groups are not initialized as expected. Helper programs for AuthorizedKeysCommand and AuthorizedPrincipalsCommand may run with privileges associated with group memberships of the sshd process, if the configuration specifies running the command as a different user. sshd en OpenSSH versiones 6.2 hasta 8.x anteriores a 8.8, cuando son usadas determinadas configuraciones... • https://bugzilla.suse.com/show_bug.cgi?id=1190975 • CWE-273: Improper Check for Dropped Privileges •

CVSS: 5.3EPSS: 16%CPEs: 5EXPL: 3

15 Sep 2021 — OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product ** EN DISPTUTA ** OpenSSH versiones hasta 8.7, permite a atacantes remotos, que presentan la sospecha de que una determinada combi... • https://github.com/aztec-eagle/cve-2016-20012 •

CVSS: 7.1EPSS: 0%CPEs: 12EXPL: 0

05 Mar 2021 — ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host. ssh-agent en OpenSSH versiones anteriores a 8.5, presenta una doble liberación que puede ser relevante en algunos escenarios menos comunes, como el acceso sin restricciones al socket del agente en un sistema operativo heredado o el reenvío de un agente a un host controlado p... • https://github.com/openssh/openssh-portable/commit/e04fd6dde16de1cdc5a4d9946397ff60d96568db • CWE-415: Double Free •

CVSS: 7.8EPSS: 66%CPEs: 12EXPL: 3

24 Jul 2020 — scp in OpenSSH through 8.3p1 allows command injection in the scp.c toremote function, as demonstrated by backtick characters in the destination argument. NOTE: the vendor reportedly has stated that they intentionally omit validation of "anomalous argument transfers" because that could "stand a great chance of breaking existing workflows." ** EN DISPUTA ** scp en OpenSSH versiones hasta 8.3p1 permite una inyección de comandos en la función toremote de scp.c, como lo demuestran los caracteres backtick en el a... • https://github.com/cpandya2909/CVE-2020-15778 • CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') •

CVSS: 5.9EPSS: 1%CPEs: 13EXPL: 0

29 Jun 2020 — The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). NOTE: some reports state that 8.5 and 8.6 are also affected. El lado del cliente en OpenSSH versiones 5.7 hasta 8.4, presenta una Discrepancia Observable que conlleva a una filtración de información en la negociación del algoritmo. Es... • http://www.openwall.com/lists/oss-security/2020/12/02/1 • CWE-203: Observable Discrepancy •

CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0

01 Jun 2020 — The scp client in OpenSSH 8.2 incorrectly sends duplicate responses to the server upon a utimes system call failure, which allows a malicious unprivileged user on the remote server to overwrite arbitrary files in the client's download directory by creating a crafted subdirectory anywhere on the remote server. The victim must use the command scp -rp to download a file hierarchy containing, anywhere inside, this crafted subdirectory. NOTE: the vendor points out that "this attack can achieve no more than a hos... • https://github.com/openssh/openssh-portable/commit/955854cafca88e0cdcd3d09ca1ad4ada465364a1 • CWE-20: Improper Input Validation •

CVSS: 7.8EPSS: 0%CPEs: 8EXPL: 2

09 Oct 2019 — OpenSSH 7.7 through 7.9 and 8.x before 8.1, when compiled with an experimental key type, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key. This leads to memory corruption and local code execution because of an error in the XMSS key parsing algorithm. NOTE: the XMSS implementation is considered experimental in all released OpenSSH versions, and there is no supported way to enable it when building portable OpenSSH. OpenSSH 7.7 a 7.9 y 8.x anterior de la v... • https://0day.life/exploits/0day-1009.html • CWE-190: Integer Overflow or Wraparound •

CVSS: 6.8EPSS: 8%CPEs: 51EXPL: 0

16 Jan 2019 — An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c. Se ha descubierto un problema en OpenSSH 7.9. Debido a la falta de cifrado de caracteres en la pantalla de progreso, un servidor malicioso (o atacante Man-in-the... • http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00058.html • CWE-116: Improper Encoding or Escaping of Output CWE-451: User Interface (UI) Misrepresentation of Critical Information •

CVSS: 6.8EPSS: 54%CPEs: 9EXPL: 3

16 Jan 2019 — In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files being transferred. En OpenSSH 7.9, debido a la aceptación y la nuestra de salidas stderr arbitrarias del servidor, un servidor malicioso (o atacante Man-in-the-Middle) puede manipular la salida del cliente, por ejemplo, para emplear códigos de control de ANSI para ocultar lo... • https://packetstorm.news/files/id/151227 • CWE-838: Inappropriate Encoding for Output Context •

CVSS: 5.9EPSS: 56%CPEs: 55EXPL: 6

16 Jan 2019 — An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well... • https://packetstorm.news/files/id/151227 • CWE-20: Improper Input Validation CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •