Detections
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EulerOS 2.0 SP8 : unbound (EulerOS-SA-2024-2056)
high Nessus Plugin ID 202963
Synopsis
The remote EulerOS host is missing multiple security updates.Description
According to the versions of the unbound packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the 'KeyTrap' issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.(CVE-2023-50387)
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the 'NSEC3' issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.(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. If a process can connect over localhost to port 8953, it can alter the configuration of unbound.service. This flaw allows an unprivileged attacker 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.(CVE-2024-1488)
Tenable has extracted the preceding description block directly from the EulerOS unbound security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected unbound packages.See Also
Plugin Details
Severity: High
ID: 202963
File Name: EulerOS_SA-2024-2056.nasl
Version: 1.1
Type: local
Family: Huawei Local Security Checks
Published: 7/22/2024
Updated: 7/22/2024
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.5
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2023-50387
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:huawei:euleros:unbound, p-cpe:/a:huawei:euleros:python2-unbound, p-cpe:/a:huawei:euleros:python3-unbound, p-cpe:/a:huawei:euleros:unbound-libs, cpe:/o:huawei:euleros:2.0
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/sp
Excluded KB Items: Host/EulerOS/uvp_version
Exploit Ease: No known exploits are available
Patch Publication Date: 7/22/2024
Vulnerability Publication Date: 2/13/2024