tree b5bb53b852ce75d4f76b15eb74e95bc857b0c10e
parent 58df5aea0a0c926b2238f65908f5e9f83d1cca25
author Remi Gacogne <remi.gacogne@powerdns.com> 1544028910 +0100
committer Willy Tarreau <w@1wt.eu> 1544622253 +0100
encoding latin1

BUG: dns: Prevent out-of-bounds read in dns_read_name()

Some callers of dns_read_name() do not make sure that we can read
the first byte, holding the length of the next label, without going
past our buffer, so we need to make sure of that.
In addition, if the label is a compressed one we need to make sure
that we can read the following byte to compute the target offset.

To be backported to 1.8, probably also 1.7.