FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

Unbound -- Denial-of-Service vulnerability

Affected packages
1.18.0 < unbound < 1.19.2


VuXML ID c2ad8700-de25-11ee-9190-84a93843eb75
Discovery 2024-03-07
Entry 2024-03-09

NLNet Labs reports:

Unbound 1.18.0 introduced a feature that removes EDE records from responses with size higher than the client's advertised buffer size. Before removing all the EDE records however, it would try to see if trimming the extra text fields on those records would result in an acceptable size while still retaining the EDE codes. Due to an unchecked condition, the code that trims the text of the EDE records could loop indefinitely. This happens when Unbound would reply with attached EDE information on a positive reply and the client's buffer size is smaller than the needed space to include EDE records. The vulnerability can only be triggered when the 'ede: yes' option is used; non default configuration.


CVE Name CVE-2024-1931