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CVE-2023-45150

Inviting excessive long email addresses to a calendar event makes the Nextcloud server unresponsive

Published: Oct 16, 2023Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-400
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
0.4%
Top 69.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Nextcloud calendar is a calendar app for the Nextcloud server platform. Due to missing precondition checks the server was trying to validate strings of any length as email addresses even when megabytes of data were provided, eventually making the server busy and unresponsive. It is recommended that the Nextcloud Calendar app is upgraded to 4.4.4. The only workaround for users unable to upgrade is to disable the calendar app.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-400CWE-354

Affected Products

РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Nextcloud CalendarNextcloud GmbH
SaaS
Cloud & SaaS / saas-application
security-advisoriesnextcloud
SaaSSaaS Service
Cloud & SaaS / saas-application
calendarnextcloud
On-prem
Cloud & SaaS / saas-application
ооо «ред софт»commercialRUOperating Systemsaka red soft
nextcloud gmbhcommercialDECloud & SaaSaka nextcloud server, nextcloud enterprise server, nextcloud calendar
nextcloudoss-projectDECloud & SaaSaka nextcloud server

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/nextcloud/calendar/pull/5358
github.com
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r936-8gwm-w452
github.com
https://hackerone.com/reports/2058337
hackerone.com
and 2 more references View all →

Timeline

Published
Oct 16, 2023
Last Updated
Nov 21, 2024

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