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CVE-2021-32703

Good to know:

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Date: July 12, 2021

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the shareinfo endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.

Language: PHP

Severity Score

Related Resources (8)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/
https://security.gentoo.org/glsa/202208-17
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-375p-cxxq-gc9p
https://hackerone.com/reports/1173684
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/
https://github.com/nextcloud/server/pull/26945
https://nvd.nist.gov/vuln/detail/CVE-2021-32703
https://www.mend.io/vulnerability-database/CVE-2021-32703

Severity Score

Weakness Type (CWE)

Improper Restriction of Excessive Authentication Attempts

CWE-307

Improper Control of Interaction Frequency

CWE-799

Top Fix

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Upgrade to version v19.0.13, v20.0.11, v21.0.3

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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