DNSSEC resource consumption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in DNSSEC. This issue affects some unknown processing. The manipulation leads to resource consumption. This vulnerability is traded as CVE-2023-50387. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in DNSSEC (affected version not known). This issue affects some unknown functionality. 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. The summary by CVE is:

Certain DNSSEC aspects of the DNS protocol (in RFC 4035 and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses when there is a zone with many DNSKEY and RRSIG records, aka the "KeyTrap" issue. The protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.

The weakness was shared 02/14/2024. The advisory is shared at datatracker.ietf.org. The identification of this vulnerability is CVE-2023-50387 since 12/07/2023. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 211316 (Fedora 41 : bind / bind-dyndb-ldap (2024-7378be30dd)), 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 (211316). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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Nessus ID: 211316
Nessus Name: Fedora 41 : bind / bind-dyndb-ldap (2024-7378be30dd)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/07/2023 🔍
02/14/2024 +69 days 🔍
02/14/2024 +0 days 🔍
11/15/2024 +275 days 🔍

Sourcesinfo

Advisory: DLA 3736-1
Status: Confirmed

CVE: CVE-2023-50387 (🔍)
GCVE (CVE): GCVE-0-2023-50387
GCVE (VulDB): GCVE-100-253829

Entryinfo

Created: 02/14/2024 16:51
Updated: 11/15/2024 14:03
Changes: 02/14/2024 16:51 (35), 03/06/2024 14:58 (1), 03/06/2024 14:59 (9), 06/11/2024 06:12 (15), 11/15/2024 14:03 (3)
Complete: 🔍
Cache ID: 216:FD0:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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