CVE-2023-45660— Require strict cookies for image proxy requests in Nextcloud Mail
Quick assessment
Affected
nextcloud security-advisories
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud mail存在代码问题漏洞，该漏洞源于缺少对源、目标和 cookie 的检查。
Possible ATT&CK Techniques 1 AI
T1498 · Network Denial of Service
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I. Basic Information for CVE-2023-45660
Vulnerability Information
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Vulnerability Title
Require strict cookies for image proxy requests in Nextcloud Mail
Source: CVE Program / CVE List V5
Vulnerability Description
Nextcloud mail is an email app for the Nextcloud home server platform. In affected versions a missing check of origin, target and cookies allows for an attacker to abuse the proxy endpoint to denial of service a third server. It is recommended that the Nextcloud Mail is upgraded to 2.2.8 or 3.3.0. There are no known workarounds for this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud mail存在代码问题漏洞，该漏洞源于缺少对源、目标和 cookie 的检查。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| nextcloud | security-advisories | >= 2.0.0, < 2.2.8 | - |
|
II. Public POCs for CVE-2023-45660
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2023-45660 (1)
-
https://github.com/nextcloud/mail/pull/8459 x_refsource_MISC
Exploits & Public PoCs for CVE-2023-45660 (1)
Same Patch Batch · nextcloud · 2023-10-16 · 5 CVEs total
| CVE-2023-45151 | 6.5 MEDIUM | OAuth2 client_secret stored in plain text in the Nextcloud database |
| CVE-2023-45150 | 4.3 MEDIUM | Inviting excessive long email addresses to a calendar event makes the Nextcloud server unr |
| CVE-2023-45149 | 4.3 MEDIUM | Password of talk conversations can be bruteforced in Nextcloud |
| CVE-2023-45148 | 4.3 MEDIUM | Rate limiter not working reliable when Memcached is installed in Nextcloud |
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V. Comments for CVE-2023-45660
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