Versions mentioned in the description apply to the upstream
Remediation section below for
Debian:9 relevant versions.
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 set to null. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-3537.
cups to version 1.7.4-2 or higher.