SUSE update for dnsmasq

Published: 2025-01-15

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-50387 CVE-2023-50868
CWE-ID	CWE-400
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available.
Vulnerable software	SUSE Linux Enterprise Server 15 SP3 Operating systems & Components / Operating system SUSE Linux Enterprise Micro for Rancher Operating systems & Components / Operating system SUSE Linux Enterprise Server for SAP Applications 15 Operating systems & Components / Operating system SUSE Linux Enterprise Server 15 Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing LTSS 15 Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing 15 Operating systems & Components / Operating system SUSE Enterprise Storage Operating systems & Components / Operating system SUSE Linux Enterprise Micro Operating systems & Components / Operating system dnsmasq-debuginfo Operating systems & Components / Operating system package or component dnsmasq Operating systems & Components / Operating system package or component dnsmasq-debugsource Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU86377

Risk: Medium

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2023-50387

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation when processing DNSSEC related records. A remote attacker can trigger resource exhaustion by forcing the DNS server to query a specially crafted DNSSEC zone and perform a denial of service (DoS) attack.

Mitigation

Update the affected package dnsmasq to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server 15 SP3: LTSS

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Server for SAP Applications 15: SP3

SUSE Linux Enterprise Server 15: SP3

SUSE Linux Enterprise High Performance Computing LTSS 15: SP3

SUSE Linux Enterprise High Performance Computing 15: SP3

SUSE Enterprise Storage: 7.1

SUSE Linux Enterprise Micro: 5.1 - 5.2

dnsmasq-debuginfo: before 2.90-150100.7.28.1

dnsmasq: before 2.90-150100.7.28.1

dnsmasq-debugsource: before 2.90-150100.7.28.1

CPE2.3

External links

http://www.suse.com/support/update/announcement/2025/suse-su-20250130-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Resource exhaustion

EUVDB-ID: #VU86378