For the stable distribution (jessie), this problem has been fixed in
version 2:4.1.8-1+deb8u4.
For the unstable distribution (sid), this problem has been fixed in
version 2:4.2.7.1-1.
We recommend that you upgrade your rails packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
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