The web interface in CUPS 1.7.4 allows local users in the lp group to read arbitrary files via a symlink attack on a file in /var/cache/cups/rss/ and language[0] set to null. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-3537.
Exploitability
AV:LAC:MAu:SImpact
C:PI:NA:N1.5/AV:L/AC:M/Au:S/C:P/I:N/A:N