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CVE-2017-12635

Quick assessment

Affected
Apache Software Foundation Apache CouchDB
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache CouchDB是美国阿帕奇（Apache）软件基金会的一个免费、开源、面向文档的数据库，是一个使用JSON作为存储格式，JavaScript作为查询语言，MapReduce和HTTP作为API的NoSQL数据库。 Apache CouchDB 1.7.0之前的版本和2.1.1之前的2.x版本中存在安全漏洞，该漏洞源于基于rlang的JSON解析器和基于JavaScript的JSON解析器之间存在差异。攻击者可利用该漏洞访问任意的shell命令或获取管理员权限。

AI Predicted 9.8 Difficulty: Easy EPSS 99.84% · P100
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I. Basic Information for CVE-2017-12635

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Due to differences in the Erlang-based JSON parser and JavaScript-based JSON parser, it is possible in Apache CouchDB before 1.7.0 and 2.x before 2.1.1 to submit _users documents with duplicate keys for 'roles' used for access control within the database, including the special case '_admin' role, that denotes administrative users. In combination with CVE-2017-12636 (Remote Code Execution), this can be used to give non-admin users access to arbitrary shell commands on the server as the database system user. The JSON parser differences result in behaviour that if two 'roles' keys are available in the JSON, the second one will be used for authorising the document write, but the first 'roles' key is used for subsequent authorization for the newly created user. By design, users can not assign themselves roles. The vulnerability allows non-admin users to give themselves admin privileges.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Apache CouchDB 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache CouchDB是美国阿帕奇（Apache）软件基金会的一个免费、开源、面向文档的数据库，是一个使用JSON作为存储格式，JavaScript作为查询语言，MapReduce和HTTP作为API的NoSQL数据库。 Apache CouchDB 1.7.0之前的版本和2.1.1之前的2.x版本中存在安全漏洞，该漏洞源于基于rlang的JSON解析器和基于JavaScript的JSON解析器之间存在差异。攻击者可利用该漏洞访问任意的shell命令或获取管理员权限。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache CouchDB 1.2.0 to 1.6.1 -

II. Public POCs for CVE-2017-12635

# POC Description Source Link Shenlong Link
1 Case study and POC of CVE-2017-12635: Apache CouchDB 1.7.0 / 2.x < 2.1.1 - Remote Privilege Escalation https://github.com/assalielmehdi/CVE-2017-12635 POC Details
2 None https://github.com/cyberharsh/Apache-couchdb-CVE-2017-12635 POC Details
3 None https://github.com/tranmanhdat/couchdb_cve-2017-12635 POC Details
4 CouchDB CVE-2017-12635 Exploit Script https://github.com/Weisant/CVE-2017-12635-EXP POC Details
5 POC for CouchDB CVE-2017-12635 https://github.com/Weisant/CVE-2017-12635-POC POC Details
6 Due to differences in the Erlang-based JSON parser and JavaScript-based JSON parser, it is possible in Apache CouchDB before 1.7.0 and 2.x before 2.1.1 to submit _users documents with duplicate keysfor 'roles' used for access control within the database, including the special case '_admin' role, that denotes administrative users. In combination with CVE-2017-12636 (Remote Code Execution), this can be used to give non-admin users access to arbitrary shell commands on the server as the database system user. The JSON parser differences result in behavior that if two 'roles' keys are available in the JSON, the second one will be used for authorizing the document write, but the first 'roles' key is used for subsequent authorization for the newly created user. By design, users can not assign themselves roles. The vulnerability allows non-admin users to give themselves admin privileges. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2017/CVE-2017-12635.yaml POC Details
7 None https://github.com/Threekiii/Awesome-POC/blob/master/%E6%95%B0%E6%8D%AE%E5%BA%93%E6%BC%8F%E6%B4%9E/Apache%20CouchDB%20%E5%9E%82%E7%9B%B4%E6%9D%83%E9%99%90%E7%BB%95%E8%BF%87%E6%BC%8F%E6%B4%9E%20CVE-2017-12635.md POC Details
8 None https://github.com/chaitin/xray-plugins/blob/main/poc/manual/couchdb-cve-2017-12635.yml POC Details
9 https://github.com/vulhub/vulhub/blob/master/couchdb/CVE-2017-12635/README.md POC Details
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III. Intelligence Information for CVE-2017-12635

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Vendor Advisories for CVE-2017-12635 (2)

Exploits & Public PoCs for CVE-2017-12635 (2)

Mailing List Discussions for CVE-2017-12635 (2)

Other References for CVE-2017-12635 (1)

Same Patch Batch · Apache Software Foundation · 2017-11-14 · 3 CVEs total

CVE-2017-12636 Apache CouchDB 安全漏洞
CVE-2017-12624 Apache CXF 安全漏洞

IV. Related Vulnerabilities

Same product: Apache CouchDB
Same vendor: Apache Software Foundation

V. Comments for CVE-2017-12635

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