CVE-2024-34447

org.bouncycastle: Use of Incorrectly-Resolved Name or Reference

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

An issue was discovered in Bouncy Castle Java Cryptography APIs before BC 1.78. When endpoint identification is enabled in the BCJSSE and an SSL socket is created without an explicit hostname (as happens with HttpsURLConnection), hostname verification could be performed against a DNS-resolved IP address in some situations, opening up a possibility of DNS poisoning.

Se descubrió un problema en las API de criptografía Java de Bouncy Castle antes de BC 1.78. Cuando la identificación de endpoint está habilitada en BCJSSE y se crea un socket SSL sin un nombre de host explícito (como sucede con HttpsURLConnection), la verificación del nombre de host podría realizarse contra una dirección IP resuelta por DNS en algunas situaciones, lo que abre una posibilidad de envenenamiento de DNS.

An issue was discovered in the Bouncy Castle Crypto Package For Java before BC TLS Java 1.0.19 (ships with BC Java 1.78, BC Java (LTS) 2.73.6) and before BC FIPS TLS Java 1.0.19. When endpoint identification is enabled in the BCJSSE and an SSL socket is created without an explicit hostname (as happens with HttpsURLConnection), hostname verification could be performed against a DNS-resolved IP address in some situations, opening up a possibility of DNS poisoning.

A flaw was found in Bouncy Castle Java Cryptography APIs. Affected versions of this package are vulnerable to a use of incorrectly-resolved name or reference issue when resolving domain names over an SSL socket that was created without an explicit hostname, such as in the HttpsURLConnection() function. If endpoint identification is enabled, this flow allows an attacker to trigger hostname verification against a DNS-resolved address.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-05-03 CVE Reserved
2024-05-03 CVE Published
2025-06-15 EPSS Updated
2025-06-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-297: Improper Validation of Certificate with Host Mismatch
CWE-706: Use of Incorrectly-Resolved Name or Reference

CAPEC

References (5)

URL	Tag	Source
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902024%E2%80%9034447
https://security.netapp.com/advisory/ntap-20240614-0007
https://www.bouncycastle.org/latest_releases.html

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2024-34447	2024-07-25
https://bugzilla.redhat.com/show_bug.cgi?id=2279227	2024-07-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Amazon Search vendor "Amazon"		Linux Search vendor "Amazon" for product "Linux"				*		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				*		-		Affected