CVE-2024-1975

SIG(0) can be used to exhaust CPU resources

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

If a server hosts a zone containing a "KEY" Resource Record, or a resolver DNSSEC-validates a "KEY" Resource Record from a DNSSEC-signed domain in cache, a client can exhaust resolver CPU resources by sending a stream of SIG(0) signed requests.
This issue affects BIND 9 versions 9.0.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.49-S1, and 9.18.11-S1 through 9.18.27-S1.

Si un servidor aloja una zona que contiene un registro de recursos "KEY", o un solucionador DNSSEC valida un registro de recursos "KEY" de un dominio firmado por DNSSEC en caché, un cliente puede agotar los recursos de la CPU del solucionador enviando una secuencia de solicitudes firmadas SIG(0). Este problema afecta a las versiones de BIND 9 9.0.0 a 9.11.37, 9.16.0 a 9.16.50, 9.18.0 a 9.18.27, 9.19.0 a 9.19.24, 9.9.3-S1 a 9.11.37-S1, 9.16.8-S1 a 9.16.49-S1 y 9.18.11-S1 a 9.18.27-S1.

A flaw was found in the bind9 package, where if a DNS server hosts a zone containing a "KEY" resource record or a DNS resolver utilizes the DNSSEC validate feature to validate a "KEY" resource record, a malicious client could exhaust the CPU resourced from the resolver by sending a stream of SIG(0) signed requests. This issue can lead to a denial of service.

If a server hosts a zone containing a "KEY" Resource Record, or a resolver DNSSEC-validates a "KEY" Resource Record from a DNSSEC-signed domain in cache, a client can exhaust resolver CPU resources by sending a stream of SIG(0) signed requests. This issue affects BIND 9 versions 9.0.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.49-S1, and 9.18.11-S1 through 9.18.27-S1.

It was discovered that Bind incorrectly handled a flood of DNS messages over TCP. A remote attacker could possibly use this issue to cause Bind to become unstable, resulting in a denial of service. Toshifumi Sakaguchi discovered that Bind incorrectly handled having a very large number of RRs existing at the same time. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service.

*Credits: N/A

CVSS Scores

Internet Systems Consortium (ISC)v3.1 7.5
Tenablev2 7.8

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:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-28 CVE Reserved
2024-07-23 CVE Published
2025-02-13 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-770: Allocation of Resources Without Limits or Throttling

CAPEC

References (5)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2024/07/23/1
http://www.openwall.com/lists/oss-security/2024/07/31/2

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://kb.isc.org/docs/cve-2024-1975	2024-07-24
https://access.redhat.com/security/cve/CVE-2024-1975	2024-09-18
https://bugzilla.redhat.com/show_bug.cgi?id=2298901	2024-09-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
ISC Search vendor "ISC"		BIND 9 Search vendor "ISC" for product "BIND 9"				>= 9.0.0 <= 9.11.37 Search vendor "ISC" for product "BIND 9" and version " >= 9.0.0 <= 9.11.37"		en		Affected
ISC Search vendor "ISC"		BIND 9 Search vendor "ISC" for product "BIND 9"				>= 9.16.0 <= 9.16.50 Search vendor "ISC" for product "BIND 9" and version " >= 9.16.0 <= 9.16.50"		en		Affected
ISC Search vendor "ISC"		BIND 9 Search vendor "ISC" for product "BIND 9"				>= 9.18.0 <= 9.18.27 Search vendor "ISC" for product "BIND 9" and version " >= 9.18.0 <= 9.18.27"		en		Affected
ISC Search vendor "ISC"		BIND 9 Search vendor "ISC" for product "BIND 9"				>= 9.19.0 <= 9.19.24 Search vendor "ISC" for product "BIND 9" and version " >= 9.19.0 <= 9.19.24"		en		Affected