// For flags

CVE-2023-29483

dnspython: denial of service in stub resolver

Severity Score

7.0
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

eventlet before 0.35.2, as used in dnspython before 2.6.0, allows remote attackers to interfere with DNS name resolution by quickly sending an invalid packet from the expected IP address and source port, aka a "TuDoor" attack. In other words, dnspython does not have the preferred behavior in which the DNS name resolution algorithm would proceed, within the full time window, in order to wait for a valid packet. NOTE: dnspython 2.6.0 is unusable for a different reason that was addressed in 2.6.1.

eventlet anterior a 0.35.2, como se usa en dnspython anterior a 2.6.0, permite a atacantes remotos interferir con la resolución de nombres DNS enviando rápidamente un paquete no válido desde la dirección IP y el puerto de origen esperados, también conocido como un ataque "TuDoor". En otras palabras, dnspython no tiene el comportamiento preferido en el que procedería el algoritmo de resolución de nombres DNS, dentro de la ventana de tiempo completa, para esperar un paquete válido. NOTA: dnspython 2.6.0 no se puede utilizar por un motivo diferente al que se abordó en 2.6.1.

The dnspython stub resolver is vulnerable to a denial of service (DoS) risk if an attacker sends a malicious response forged with the correct address and port before a legitimate one arrives on the UDP port used by dnspython for the query. In such cases, dnspython could either switch to another resolver or abandon the query altogether, potentially leading to service denial for that resolution.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Attack Vector
Network
Attack Complexity
High
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
Poc
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-04-07 CVE Reserved
  • 2024-04-11 CVE Published
  • 2024-04-12 EPSS Updated
  • 2024-08-27 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-292: DEPRECATED: Trusting Self-reported DNS Name
  • CWE-696: Incorrect Behavior Order
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Centos
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Centos
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*-
Affected
Eventlet
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Eventlet
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*-
Affected
Oracle
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Exadata Dbserver
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*-
Affected
Redhat
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Openshift Ironic
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*-
Affected
Amazon
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Linux
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Affected
Centos
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Centos
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Affected
Fedoraproject
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Fedora
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Affected
Huawei
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Euleros
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Affected
Opensuse
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Leap
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Affected
Oracle
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Linux
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Affected
Redhat
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Enterprise Linux
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Affected
Rocky
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Linux
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Affected
Suse
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Packagehub
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Affected
Suse
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Sle-module-basesystem
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Affected
Suse
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Sle-module-public-cloud
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Affected
Suse
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Sle-module-python3
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Suse
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Sle Hpc-espos
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Suse
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Sle Hpc-ltss
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Suse
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Sle Hpc
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Suse
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Sled
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Suse
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Sles-ltss
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Suse
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Sles
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Suse
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Sles Sap
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Suse
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Suse-manager-proxy
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Suse
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Suse-manager-server
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Affected