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Security fix, CVE-2017-14496, Integer underflow in DNS response creation.

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Fix DoS in DNS. Invalid boundary checks in the
add_pseudoheader function allows a memcpy call with negative
size An attacker which can send malicious DNS queries
to dnsmasq can trigger a DoS remotely.
dnsmasq is vulnerable only if one of the following option is
specified: --add-mac, --add-cpe-id or --add-subnet.
This commit is contained in:
Simon Kelley
2017-09-25 20:11:58 +01:00
parent 33e3f1029c
commit 897c113fda
2 changed files with 23 additions and 1 deletions
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11
CHANGELOG
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@@ -60,6 +60,17 @@ version 2.78
and Kevin Hamacher of the Google Security Team for
finding this.
Fix DoS in DNS. Invalid boundary checks in the
add_pseudoheader function allows a memcpy call with negative
size An attacker which can send malicious DNS queries
to dnsmasq can trigger a DoS remotely.
dnsmasq is vulnerable only if one of the following option is
specified: --add-mac, --add-cpe-id or --add-subnet.
CVE-2017-14496 applies.
Credit to Felix Wilhelm, Fermin J. Serna, Gabriel Campana
and Kevin Hamacher of the Google Security Team for
finding this.
version 2.77
Generate an error when configured with a CNAME loop,