// For flags

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

0
*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.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* 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
  • 2024-08-01 CVE Updated
  • 2024-08-01 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
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