CVE-2022-29243

Improper input-size validation on the user new session name in Nextcloud Server

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Prior to versions 22.2.7 and 23.0.4, missing input-size validation of new session names allows users to create app passwords with long names. These long names are then loaded into memory on usage, resulting in impacted performance. Versions 22.2.7 and 23.0.4 contain a fix for this issue. There are currently no known workarounds available.

Nextcloud Server es el software de servidor de archivos de Nextcloud, una plataforma de productividad auto alojada. En versiones anteriores a 22.2.7 y 23.0.4, una falta de comprobación del tamaño de la entrada de los nuevos nombres de sesión permite a usuarios crear contraseñas de aplicaciones con nombres largos. Estos nombres largos son cargados en la memoria durante el uso, resultando en un impacto en el rendimiento. Las versiones 22.2.7 y 23.0.4 contienen una correción para este problema. Actualmente no se presentan mitigaciones conocidas disponibles

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-04-13 CVE Reserved
2022-05-31 CVE Published
2023-12-22 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-400: Uncontrolled Resource Consumption

CAPEC

References (4)

URL	Tag	Source
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7cwm-qph5-4h5w	Third Party Advisory
https://hackerone.com/reports/1153138	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/nextcloud/server/pull/31658	2022-09-27

URL	Date	SRC
https://security.gentoo.org/glsa/202208-17	2022-09-27

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				< 22.2.7 Search vendor "Nextcloud" for product "Nextcloud Server" and version " < 22.2.7"		-		Affected
Nextcloud Search vendor "Nextcloud"		Nextcloud Server Search vendor "Nextcloud" for product "Nextcloud Server"				> 23.0.0 < 23.0.4 Search vendor "Nextcloud" for product "Nextcloud Server" and version " > 23.0.0 < 23.0.4"		-		Affected