Rapid7 Vulnerability & Exploit Database

CVE-2017-13704: DNSMasq: Integer underflow flaw leading to buffer over-read

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CVE-2017-13704: DNSMasq: Integer underflow flaw leading to buffer over-read

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
10/02/2017
Created
07/25/2018
Added
10/02/2017
Modified
12/04/2017

Description

In dnsmasq before 2.78, if the DNS packet size does not match the expected size, the size parameter in a memset call gets a negative value. As it is an unsigned value, memset ends up writing up to 0xffffffff zero's (0xffffffffffffffff in 64 bit platforms), making dnsmasq crash.

Solution(s)

  • dnsmasq-upgrade-latest

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