The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:2696 advisory.

    The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.

    Security Fix(es):

    * bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator (CVE-2023-50387)

    * bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources (CVE-2023-50868)

    * A vulnerability was found in Unbound due to incorrect default permissions, allowing any process outside     the unbound group to modify the unbound runtime configuration. The default combination of the control-     use-cert: no option with either explicit or implicit use of an IP address in the control-interface     option could allow improper access. If a process can connect over localhost to port 8953, it can alter the     configuration of unbound.service.  This flaw allows an unprivileged local process to manipulate a running     instance, potentially altering forwarders, allowing them to track all queries forwarded by the local     resolver, and, in some cases, disrupting resolving altogether.

    To mitigate the vulnerability, a new file /etc/unbound/conf.d/remote-control.conf has been added and     included in the main unbound configuration file, unbound.conf. The file contains two directives that     should limit access to unbound.conf:

        control-interface: /run/unbound/control         control-use-cert: yes

    For details about these directives, run man unbound.conf.

    Updating to the version of unbound provided by this advisory should, in most cases, address the     vulnerability. To verify that your configuration is not vulnerable, use the unbound-control status | grep     control command. If the output contains control(ssl) or control(namedpipe), your configuration is not     vulnerable. If the command output returns only control, the configuration is vulnerable because it does     not enforce access only to the unbound group members. To fix your configuration, add the line include:
    /etc/unbound/conf.d/remote-control.conf to the end of the file /etc/unbound/unbound.conf. If you use a     custom /etc/unbound/conf.d/remote-control.conf file, add the new directives to this file.
    (CVE-2024-1488)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

RHEL 8 : unbound (RHSA-2024:2696)

high Nessus Plugin ID 194993

Version 1.3

Version 1.2

Version 1.1

Version 1.0

Version 1.3 Nov 8, 2024, 5:19 AM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Plugin metadata Plugin Feed: 202411080519
Version 1.2 Jun 3, 2024, 7:01 PM Detection (updated detection logic) Plugin metadata Reference Plugin Feed: 202406031901
Version 1.1 May 10, 2024, 12:25 PM Reference Plugin metadata Detection (updated detection logic) Plugin Feed: 202405101225
Version 1.0 May 6, 2024, 8:57 AM New Plugin Feed: 202405060857