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lwIP TCP/IP Stack DNS Resolver <= 1.4.1 Cache-Poisoning Attack Vulnerability
Information
Severity
Severity
Medium
Family
Family
General
CVSSv2 Base
CVSSv2 Base
4.3
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:M/Au:N/C:N/I:P/A:N
Solution Type
Solution Type
Vendor Patch
Created
Created
3 years ago
Modified
Modified
3 years ago
Summary
The lwIP TCP/IP Stack DNS Resolver is vulnerable against a cache-poisoning attack.
Insight
Insight
'dns.c' in the DNS resolver in lwIP does not use random values for ID fields and source ports of DNS query packets, which makes it easier for man-in-the-middle attackers to conduct cache-poisoning attacks via spoofed reply packets.
Affected Software
Affected Software
lwIP TCP/IP Stack DNS Resolver 1.4.1 and earlier.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 2.0.0 or later.