ID de Prueba:	1.3.6.1.4.1.25623.1.0.51522
Categoría:	Conectiva Local Security Checks
Título:	Conectiva Security Advisory CLA-2002:502
Resumen:	NOSUMMARY
Descripción:	Description: The remote host is missing updates announced in advisory CLA-2002:502. OpenSSH[1] is a very popular and versatile tool that uses encrypted connections between hosts and is commonly used for remote administration. ISS[5] published[4] an advisory concerning a remote vulnerability in OpenSSH that could be used by remote attackers to obtain root privileges on the server where OpenSSH is running. The vulnerability is present in two authentication mechanisms: ChallengeResponse and PAMAuthenticationViaKbdInt. If these mechanisms are not necessary in your installation, they can be disabled by the following entries in /etc/ssh/sshd_config: ChallengeResponseAuthentication no PAMAuthenticationViaKbdInt no Please note that any changes made to the sshd_config file require a service restart to be effective. To minimize the impact of this vulnerability the 3.3p1 version of OpenSSH has been made available previously[2]. That version, which still has this vulnerability, implements by default the PrivilegeSeparation mechanism which greatly reduces the impact of this and potential future vulnerabilities in OpenSSH. The 3.4p1 version of OpenSSH has now been made available and it includes fixes for the reported vulnerabilities. Even though the vulnerability is fixed in version 3.4p1, users are still advised to keep using the PrivilegeSeparation feature. There are, though, still a few problems with certain authentication methods and PrivilegeSeparation that are expected to be solved in future releases. Whenever appropriate, new packages will be provided as bugfix advisories. In particular, the packages provided here contain a patch from Solar Designer (from the Openwall Project[4]) which allows the use of PrivilegeSeparation together with data compression in 2.2 kernels. Next releases might not need this patch anymore. If for some reason the use of PrivilegeSeparation is not possible in some setup, it can be disabled via the following entry in /etc/ssh/sshd_config: UsePrivilegeSeparation no Solution: The apt tool can be used to perform RPM package upgrades by running 'apt-get update' followed by 'apt-get upgrade' http://www.openssh.com http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000500 http://www.cert.org/advisories/CA-2002-18.html http://bvlive01.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=20584 http://www.iss.net/ http://www.openwall.com/Owl/ http://www.securityspace.com/smysecure/catid.html?in=CLA-2002:502 http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=002002 Risk factor : High
Copyright	Copyright (c) 2005 E-Soft Inc. http://www.securityspace.com

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