Vulnerability identifier: #VU75389

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-28450

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Dnsmasq
Server applications / DNS servers

Vendor: GNU

Description

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

The vulnerability exists due to application does not properly perform fragmentation of UDP packets. A remote attacker can trigger resource exhaustion by sending overly large DNS UDP packets.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Dnsmasq: 2.0 - 2.89

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External links
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=blob;f=CHANGELOG
http://capec.mitre.org/data/definitions/495.html
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=eb92fb32b746f2104b0f370b5b295bb8dd4bd5e5
http://thekelleys.org.uk/dnsmasq/doc.html
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OU2ZT4ITSEOOR2CFBAHK4Z67KXJIEWQA/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6UQ6LKDTLSSD64TBIZ3XEKBM2SWC63VV/

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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.