Unbound up to 1.19.0 DNSSEC Validator denial of service

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.
5.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Unbound up to 1.19.0. It has been classified as problematic. This issue affects some unknown processing of the component DNSSEC Validator. Performing a manipulation results in denial of service. This vulnerability is reported as CVE-2023-50387. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Unbound up to 1.19.0. This affects an unknown code block of the component DNSSEC Validator. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability.

The weakness was disclosed 02/13/2024. It is possible to read the advisory at seclists.org. This vulnerability is uniquely identified as CVE-2023-50387 since 12/07/2023. The technical details are unknown and an exploit is not publicly available.

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.

Upgrading to version 1.9.1 eliminates this vulnerability. The upgrade is hosted for download at nlnetlabs.nl.

The vulnerability is also documented in the vulnerability database at Tenable (211316). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 5.0

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

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

Exploitinginfo

Class: Denial of service
CWE: 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: 211316
Nessus Name: Fedora 41 : bind / bind-dyndb-ldap (2024-7378be30dd)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Unbound 1.9.1

Timelineinfo

12/07/2023 🔍
02/13/2024 +68 days 🔍
02/13/2024 +0 days 🔍
11/15/2024 +276 days 🔍

Sourcesinfo

Advisory: DLA 3736-1
Status: Confirmed

CVE: CVE-2023-50387 (🔍)
GCVE (CVE): GCVE-0-2023-50387
GCVE (VulDB): GCVE-100-253587

Entryinfo

Created: 02/13/2024 18:14
Updated: 11/15/2024 14:03
Changes: 02/13/2024 18:14 (39), 02/15/2024 08:59 (1), 03/04/2024 09:24 (2), 03/04/2024 09:26 (11), 06/11/2024 06:12 (15), 11/15/2024 14:03 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

 Anonymous User (+0)
3 years ago
Good morning,
could you please align to the official cpe of NVD Nist "nlnetlabs:unbound"?
We would appreciate it very much.
Best Regards,
TEAM CERT
 VulDB Community Team3 years ago
Thank you, we have just aligned the CPE.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!