PT-2023-29634 · Nextcloud · Nextcloud Mail

Arianitisufi + 2 · Published 2023-10-16 · Updated 2023-10-20 · CVE-2023-45660

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 Mail versions prior to 2.2.8 Nextcloud Mail versions prior to 3.3.0

Description The issue is related to a missing check of origin, target, and cookies in Nextcloud Mail, allowing an attacker to abuse the proxy endpoint and cause a denial of service to a third server.

Recommendations For versions prior to 2.2.8, upgrade to 2.2.8. For versions prior to 3.3.0, upgrade to 3.3.0. As a temporary workaround, consider restricting access to the proxy endpoint until a patch is available.

Exploit

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2023-45660

GHSA-8J9X-FMWW-QR37

Affected Products

Nextcloud Mail

References · 9

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45660.json · Exploit
• https://github.com/nextcloud/mail/pull/8459 · Patch
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8j9x-fmww-qr37 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-45660 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-45660 · Security Note
• https://t.me/cibsecurity/72334 · Telegram Post
• https://twitter.com/CVEnew/status/1713988507213910188 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1714017361001345268 · Twitter Post
• https://hackerone.com/reports/1895874 · Note