PT-2023-6442 · Nextcloud+2 · Nextcloud+2

Nickvergessen · Published 2023-10-16 · Updated 2025-01-24 · CVE-2023-45148

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Nextcloud versions prior to 25.0.11 Nextcloud versions prior to 26.0.6 Nextcloud versions prior to 27.1.0

Description The issue is related to the use of Memcached as memcache.distributed in Nextcloud, which can cause the rate limiting on the server to be reset unexpectedly, leading to the rate count being reset earlier than intended. This can be exploited by a remote attacker to cause a denial of service.

Recommendations For versions prior to 25.0.11, upgrade to version 25.0.11 or later. For versions prior to 26.0.6, upgrade to version 26.0.6 or later. For versions prior to 27.1.0, upgrade to version 27.1.0 or later. As a temporary workaround for users unable to upgrade, change the config setting memcache.distributed to OCMemcacheRedis and install Redis instead of Memcached.

Exploit

Fix

Improper Restriction of Excessive Authentication Attempts

Cleartext Storage of Sensitive Information

Weakness Enumeration

CWE-307

CWE-312

Related Identifiers

ALT-PU-2023-7785

ALT-PU-2023-7786

ALT-PU-2024-1230

ALT-PU-2025-1855

BDU:2023-07158

BDU:2023-07159

CVE-2023-45148

GHSA-XMHP-7VR4-HP63

Affected Products

Alt Linux

Nextcloud

Red Os

References · 17

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45148.json · Exploit
• https://github.com/nextcloud/server/pull/40293 · Patch
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xmhp-7vr4-hp63 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-45148 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-07158 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-45148 · Security Note
• https://bdu.fstec.ru/vul/2023-07159 · Security Note
• https://github.com/nextcloud/server/pull/38398 · Note
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhgv-jcg9-p4m9 · Note
• https://hackerone.com/reports/1994324 · Note
• https://redos.red-soft.ru/support/secure · Note
• https://hackerone.com/reports/2110945 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-nextcloud-cve-2023-45148-cve-2023-45151 · Note
• https://twitter.com/VulmonFeeds/status/1714017614035399128 · Twitter Post
• https://twitter.com/CVEnew/status/1713996724010664067 · Twitter Post