Mandriva Linux Security Update Advisory - faxcron, recvstats, and xferfaxstats in HylaFax 4.2.1 and earlier allows local users to overwrite arbitrary files via a symlink attack on temporary files. In addition, HylaFax has some provisional support for Unix domain sockets, which is disabled in the default compile configuration. It is suspected that a local user could create a fake /tmp/hyla.unix socket and intercept fax traffic via this socket. In testing for this vulnerability, with CONFIG_UNIXTRANSPORT disabled, it has been found that client programs correctly exit before sending any data.
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