DNS Protocol DNS Query DNSBomb resource consumption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in DNS Protocol. This vulnerability affects unknown code of the component DNS Query Handler. Such manipulation leads to resource consumption. This vulnerability is documented as CVE-2024-33655. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in DNS Protocol (version unknown). It has been rated as critical. Affected by this issue is an unknown function of the component DNS Query Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

The DNS protocol in RFC 1035 and updates allows remote attackers to cause a denial of service (resource consumption) by arranging for DNS queries to be accumulated for seconds, such that responses are later sent in a pulsing burst (which can be considered traffic amplification in some cases), aka the "DNSBomb" issue.

The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2024-33655 since 04/25/2024. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 208760 (CBL Mariner 2.0 Security Update: unbound (CVE-2024-33655)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (208760). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • NLnet Unbound

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 208760
Nessus Name: CBL Mariner 2.0 Security Update: unbound (CVE-2024-33655)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/25/2024 🔍
05/10/2024 +15 days 🔍
05/10/2024 +0 days 🔍
10/12/2024 +155 days 🔍

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2024-33655 (🔍)
GCVE (CVE): GCVE-0-2024-33655
GCVE (VulDB): GCVE-100-263816

Entryinfo

Created: 05/10/2024 09:02
Updated: 10/12/2024 03:27
Changes: 05/10/2024 09:02 (51), 06/06/2024 20:04 (6), 06/07/2024 06:36 (1), 06/07/2024 18:58 (1), 08/23/2024 03:43 (12), 10/12/2024 03:27 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

 Anonymous User (+0)
2 years ago
Good morning,
I can't find this cpe in the NVD Nist dictionary.
Since the affected packages are:
unbound
Could you use the following cpe?
nlnetlabs:unbound
unbound:unbound
We appreciated it very much.
Best Regards,
TEAM CERT
 VulDB Community Team2 years ago
This appears to be a very generic CVE affecting "all" DNS products. Unfortunately, in this case we cannot maintain a complete CPE list.
 Anonymous User (+0)
2 years ago
Forgive me if I insist but I see that you also used this cpe when the vulnerability was reserved:
nlnet:unbound
This cpe does not exist in the NVD Nist dictionary but rather nlnetlabs:unbound.
Could you then review the CPE and update?
Best Regards,
TEAM CERT
 VulDB Community Team2 years ago
The initial disclosure https://bugzilla.redhat.com/show_bug.cgi?id=2279942 mentioned Unbound. But this was overly specific and not inline with the final CVE definition at the moment. We expect a lot of affected products. This is why we updated our entry.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!