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Red Hat Security Advisory 2024-2587-03

Red Hat Security Advisory 2024-2587-03 - An update for unbound is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions.

Packet Storm
#vulnerability#linux#red_hat#js#sap#ssl
The following advisory data is extracted from:https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_2587.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Important: unbound security updateAdvisory ID:        RHSA-2024:2587-03Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2024:2587Issue date:         2024-04-30Revision:           03CVE Names:          CVE-2023-50387====================================================================Summary: An update for unbound is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions.Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:The unbound packages provide a validating, recursive, and caching DNS orDNSSEC resolver.Security Fix(es):* bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator(CVE-2023-50387)* bind9: Preparing an NSEC3 closest encloser proof can exhaust CPUresources (CVE-2023-50868)* A vulnerability was found in Unbound due to incorrect defaultpermissions, 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, inmost 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 tothis 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.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-50387References:https://access.redhat.com/security/updates/classification/#importanthttps://bugzilla.redhat.com/show_bug.cgi?id=2263914https://bugzilla.redhat.com/show_bug.cgi?id=2263917https://bugzilla.redhat.com/show_bug.cgi?id=2264183

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