Detections
Analytics
RHEL 8 : dnsmasq (RHSA-2024:1545)
high Nessus Plugin ID 192625
Language:
Synopsis
The remote Red Hat host is missing one or more security updates for dnsmasq.Description
The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:1545 advisory.- A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who sends a crafted packet processed by dnsmasq, potentially causing a denial of service. (CVE-2022-0934)
- An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020. (CVE-2023-28450)
- 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)
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 RHEL dnsmasq package based on the guidance in RHSA-2024:1545.See Also
https://access.redhat.com/security/cve/CVE-2022-0934
https://access.redhat.com/security/cve/CVE-2023-28450
https://access.redhat.com/security/cve/CVE-2023-50387
Plugin Details
Severity: High
ID: 192625
File Name: redhat-RHSA-2024-1545.nasl
Version: 1.0
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 3/27/2024
Updated: 3/27/2024
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.1
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: cpe:/o:redhat:rhel_aus:8.6, cpe:/o:redhat:rhel_e4s:8.6, cpe:/o:redhat:rhel_eus:8.6, cpe:/o:redhat:rhel_tus:8.6, p-cpe:/a:redhat:enterprise_linux:dnsmasq, p-cpe:/a:redhat:enterprise_linux:dnsmasq-utils
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 3/27/2024
Vulnerability Publication Date: 4/3/2022
Reference Information
CVE: CVE-2022-0934, CVE-2023-28450, CVE-2023-50387, CVE-2023-50868