PT-2021-19869 · Nextcloud+2 · Nextcloud Server+2

Lukas Reschke · Published 2021-07-12 · Updated 2022-10-26 · CVE-2021-32703

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions Nextcloud Server versions prior to 19.0.13 Nextcloud Server versions prior to 20.0.11 Nextcloud Server versions prior to 21.0.3

Description The issue is related to a lack of ratelimiting on the "shareinfo" endpoint, which may have allowed an attacker to enumerate potentially valid share tokens.

Recommendations For versions prior to 19.0.13, update to version 19.0.13 or later. For versions prior to 20.0.11, update to version 20.0.11 or later. For versions prior to 21.0.3, update to version 21.0.3 or later.

Fix

Improper Restriction of Excessive Authentication Attempts

Weakness Enumeration

CWE-799

CWE-307

Related Identifiers

ALT-PU-2021-3108

ALT-PU-2021-3224

CVE-2021-32703

GHSA-375P-CXXQ-GC9P

OPENSUSE-SU-2021:1068-1

OPENSUSE-SU-2021_1068-1

Affected Products

Alt Linux

Nextcloud Server

Suse

References · 39

• https://github.com/nextcloud/server/pull/26945 · Patch
• https://osv.dev/vulnerability/openSUSE-SU-2021:1068-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-32703 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-32703 · Vendor Advisory
• https://security.gentoo.org/glsa/202208-17 · Vendor Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-375p-cxxq-gc9p · Note
• https://bugzilla.suse.com/1188256 · Note
• https://hackerone.com/reports/1173684 · Note
• https://suse.com/security/cve/CVE-2021-32726 · Note
• https://suse.com/security/cve/CVE-2020-8294 · Note
• https://t.me/cvenotify/34534 · Telegram Post
• https://bugzilla.suse.com/1181804 · Note
• https://suse.com/security/cve/CVE-2021-32680 · Note