CVE-2025-26466
CVE-2025-26466 · Openssh: denial-of-service in openssh
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack.
CVSS 5.9 · Media · EPSS 38,7% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: system · network
Productos y versiones afectados
red hat enterprise linux 10
- Versiones
- ≥ 0:9.9p1-7.el10_0: No afectada (rpm)
Sin corrección publicada
red hat enterprise linux 9
- Versiones
- ≥ 0:8.7p1-45.el9: No afectada (rpm)
Sin corrección publicada
red hat enterprise linux 6
Sin corrección publicada
red hat enterprise linux 7
Sin corrección publicada
red hat enterprise linux 8
Sin corrección publicada
red hat openshift container platform 4
Sin corrección publicada
openssh Debian:13
- Intervalos de versiones afectados
- ECOSYSTEM: < 1:9.9p2-1
Actualiza a 1:9.9p2-1
openssh Debian:14
- Intervalos de versiones afectados
- ECOSYSTEM: < 1:9.9p2-1
Actualiza a 1:9.9p2-1
openssh Ubuntu:24.04:LTS
- Versiones
- 1:9.3p1-1ubuntu3
- 1:9.4p1-1ubuntu1
- 1:9.6p1-3ubuntu1
- 1:9.6p1-3ubuntu2
- 1:9.6p1-3ubuntu11
- 1:9.6p1-3ubuntu12
- 1:9.6p1-3ubuntu13
- 1:9.6p1-3ubuntu13.3
- 1:9.6p1-3ubuntu13.4
- 1:9.6p1-3ubuntu13.5
- 1:9.6p1-3ubuntu13.7
- Intervalos de versiones afectados
- ECOSYSTEM: < 1:9.6p1-3ubuntu13.8
Actualiza a 1:9.6p1-3ubuntu13.8
Fuentes originales
- https://access.redhat.com/errata/RHBA-2025:6305
- https://access.redhat.com/errata/RHSA-2025:6993
- https://access.redhat.com/security/cve/CVE-2025-26466
- https://bugzilla.redhat.com/show_bug.cgi?id=2345043
- https://seclists.org/oss-sec/2025/q1/144
- https://www.qualys.com/2025/02/18/openssh-mitm-dos.txt
- https://security.netapp.com/advisory/ntap-20250228-0002/
- https://www.openwall.com/lists/oss-security/2025/02/18/1
- https://www.openwall.com/lists/oss-security/2025/02/18/4
- https://bugzilla.suse.com/show_bug.cgi?id=1237041
- https://security-tracker.debian.org/tracker/CVE-2025-26466
- https://ubuntu.com/security/CVE-2025-26466
- http://seclists.org/fulldisclosure/2025/May/8
- http://seclists.org/fulldisclosure/2025/May/7
- http://seclists.org/fulldisclosure/2025/Feb/18
- https://www.vicarius.io/vsociety/posts/cve-2025-26466-detection-script-memory-consumption-vulnerability-in-openssh
- https://www.vicarius.io/vsociety/posts/cve-2025-26466-mitigation-script-memory-consumption-vulnerability-in-openssh
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-26466