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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not properly handled by the CRC compensation attack detector.
Source: MITRE View Analysis Description
sshd in OpenSSH, when using the version 1 SSH protocol, allows remote attackers to cause a denial of service (CPU consumption) via an SSH packet that contains duplicate blocks.
Source: MITRE
Base Score: 7.8 HIGH Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C) (V2 legend) Impact Subscore: 6.9 Exploitability Subscore: 10.0
Access Vector (AV): Network Access Complexity (AC): Low Authentication (AU): None Confidentiality (C): None Integrity (I): None Availability (A): Complete Additional Information: Allows disruption of service
Red Hat Enterprise Linux 5 is not vulnerable to this issue as it contains a backported patch.
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Vulnerability Type (View All)
http://www.securityfocus.com/archive/1/447153/100/0/threaded [No Types Assigned]
http://www.securityfocus.com/archive/1/archive/1/447153/100/0/threaded [No Types Assigned]
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10462 [No Types Assigned]
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1193 [No Types Assigned]
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:10462 [No Types Assigned]
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:1193 [Tool Signature, US Government Resource]
https://exchange.xforce.ibmcloud.com/vulnerabilities/29158 [No Types Assigned]
http://xforce.iss.net/xforce/xfdb/29158 [No Types Assigned]
sshd en OpenSSH en versiones anteriores a 4.4, cuando se utiliza la versión 1 del protocolo SSH, permite a atacantes remotos provocar una denegación de servicio (consumo de CPU) a través de un paquete SSH que contiene bloques duplicados, los cuales no se manejan correctamente por el detector de ataque de compensación CRC.
sshd en OpenSSH versiones anteriores a 4.4, al usar la versión 1 del protocolo SSH, permite a atacantes remotos provocar una denegación de servicio (consumo de CPU) mediante un paquete SSH que contiene bloques duplicados, que no es gestionado apropiadamente por el detector de ataques de compensación CRC.
http://marc.info/?l=openssh-unix-dev&m=115939141729160&w=2
http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=115939141729160&w=2