CVE-2002-0638 Information

Description

setpwnam.c in the util-linux package as included in Red Hat Linux 7.3 and earlier and other operating systems does not properly lock a temporary file when modifying /etc/passwd which may allow local users to gain privileges via a complex race condition that uses an open file descriptor in utility programs such as chfn and chsh.

Reference

ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-043.0.txt http://archives.neohapsis.com/archives/bugtraq/2002-07/0357.html http://archives.neohapsis.com/archives/bugtraq/2002-07/0396.html http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000523 http://marc.info/?l=bugtraq&m=102795787713996&w=2 http://online.securityfocus.com/advisories/4320 http://rhn.redhat.com/errata/RHSA-2002-132.html http://www.iss.net/security_center/static/9709.php http://www.kb.cert.org/vuls/id/405955 http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-047.php http://www.osvdb.org/5164 http://www.redhat.com/support/errata/RHSA-2002-137.html http://www.securityfocus.com/bid/5344