ID de Prueba:	1.3.6.1.4.1.25623.1.0.51241
Categoría:	Red Hat Local Security Checks
Título:	RedHat Security Advisory RHSA-2002:137
Resumen:	NOSUMMARY
Descripción:	Description: The remote host is missing updates announced in advisory RHSA-2002:137. The util-linux package shipped with Red Hat Linux Advanced Server contains a locally exploitable vulnerability. The util-linux package contains a large variety of low-level system utilities that are necessary for a Linux system to function. The 'chfn' utility included in this package allows users to modify personal information stored in the system-wide password file, /etc/passwd. In order to modify this file, this application is installed setuid root. Under certain conditions, a carefully crafted attack sequence can be performed to exploit a complex file locking and modification race present in this utility allowing changes to be made to /etc/passwd. In order to successfully exploit the vulnerability and perform privilege escalation there is a need for a minimal administrator interaction. Additionally, the password file must be over 4 kilobytes, and the local attackers entry must not be in the last 4 kilobytes of the password file. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2002-0638 to this issue. An interim workaround is to remove setuid flags from /usr/bin/chfn and /usr/bin/chsh. All users of Red Hat Linux should update to the errata util-linux packages which contain a patch to correct this vulnerability. Many thanks to Michal Zalewski of Bindview for alerting us to this issue. Solution: Please note that this update is available via Red Hat Network. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date http://rhn.redhat.com/errata/RHSA-2002-137.html http://www.kb.cert.org/vuls/id/405955 http://razor.bindview.com/publish/advisories/adv_chfn.html Risk factor : High CVSS Score: 6.2
Referencia Cruzada:	BugTraq ID: 5344 Common Vulnerability Exposure (CVE) ID: CVE-2002-0638 http://www.securityfocus.com/bid/5344 Bugtraq: 20020729 RAZOR advisory: Linux util-linux chfn local root vulnerability (Google Search) http://marc.info/?l=bugtraq&m=102795787713996&w=2 Bugtraq: 20020730 TSLSA-2002-0064 - util-linux (Google Search) http://archives.neohapsis.com/archives/bugtraq/2002-07/0396.html Caldera Security Advisory: CSSA-2002-043.0 ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-043.0.txt CERT/CC vulnerability note: VU#405955 http://www.kb.cert.org/vuls/id/405955 Conectiva Linux advisory: CLA-2002:523 http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000523 HPdes Security Advisory: HPSBTL0207-054 http://online.securityfocus.com/advisories/4320 http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-047.php http://www.osvdb.org/5164 RedHat Security Advisories: RHSA-2002:132 http://rhn.redhat.com/errata/RHSA-2002-132.html http://www.redhat.com/support/errata/RHSA-2002-137.html http://archives.neohapsis.com/archives/bugtraq/2002-07/0357.html http://www.iss.net/security_center/static/9709.php
Copyright	Copyright (c) 2005 E-Soft Inc. http://www.securityspace.com

Esta es sólo una de 99761 pruebas de vulnerabilidad en nuestra serie de pruebas. Encuentre más sobre cómo ejecutar una auditoría de seguridad completa. Para ejecutar una prueba gratuita de esta vulnerabilidad contra su sistema, regístrese ahora.