CVE-2021-37629— Lack of ratelimit on Richdocuments OCS endpoint in nextcloud
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I. Basic Information for CVE-2021-37629
Vulnerability Information
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Vulnerability Title
Lack of ratelimit on Richdocuments OCS endpoint in nextcloud
Source: NVD (National Vulnerability Database)
Vulnerability Description
Nextcloud Richdocuments is an open source collaborative office suite. In affected versions there is a lack of rate limiting on the Richdocuments OCS endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. It is recommended that the Nextcloud Richdocuments app is upgraded to either 3.8.4 or 4.2.1 to resolve. For users unable to upgrade it is recommended that the Richdocuments application be disabled.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nextcloud 信息泄露漏洞
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 Richdocuments存在信息泄露漏洞，该漏洞源于在受影响的版本中，Richdocuments OCS端点没有速率限制。这可能允许攻击者可利用该漏洞枚举潜在的有效共享令牌。建议将Nextcloud Richdocuments应用升级到3.8.4或4.2.1来解决。对于无法升级的用户，建议禁用Richdocuments应用程序。
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 | < 3.8.4 | - |
II. Public POCs for CVE-2021-37629
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://hackerone.com/reports/1258750x_refsource_MISC
- https://github.com/nextcloud/richdocuments/pull/1663x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-37629
Same Patch Batch · nextcloud · 2021-09-07 · 9 CVEs total
| CVE-2021-32802 | 9.3 CRITICAL | Preview generation used third-party library not suited for user-generated content in Nextc |
| CVE-2021-32800 | 8.1 HIGH | Bypass of Two Factor Authentication in Nextcloud server |
| CVE-2021-37628 | 7.5 HIGH | File Drop can be bypassed using Richdocuments app in nextcloud |
| CVE-2021-37630 | 6.5 MEDIUM | Secret Circle can be joined without approval in Nextcloud Circles |
| CVE-2021-37631 | 6.5 MEDIUM | Circle can be accessed by non-Circle members in Nextcloud Deck |
| CVE-2021-32782 | 5.8 MEDIUM | Cross-Site Scripting in Nextcloud Circles |
| CVE-2021-32801 | 5.5 MEDIUM | Exceptions may have logged Encryption-at-Rest key content in Nextcloud server |
| CVE-2021-32766 | 5.3 MEDIUM | Nextcloud Text app can disclose existence of folders in "File Drop" link share |
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V. Comments for CVE-2021-37629
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