Improper Privilege Management The advisory has been revoked - it doesn't affect any version of package couchdb (opens in a new tab)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1404-COUCHDB-326750
- published14 Nov 2017
- disclosed14 Nov 2017
Introduced: 14 Nov 2017
CVE-2017-12635 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:14.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream couchdb package and not the couchdb package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-12635
- https://lists.apache.org/thread.html/6c405bf3f8358e6314076be9f48c89a2e0ddf00539906291ebdf0c67@%3Cdev.couchdb.apache.org%3E
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbmu03935en_us
- https://lists.debian.org/debian-lts-announce/2018/01/msg00026.html
- https://www.exploit-db.com/exploits/44498/
- https://www.exploit-db.com/exploits/45019/
- https://security.gentoo.org/glsa/201711-16
- http://www.securityfocus.com/bid/101868
- https://lists.apache.org/thread.html/6c405bf3f8358e6314076be9f48c89a2e0ddf00539906291ebdf0c67%40%3Cdev.couchdb.apache.org%3E
- https://www.exploit-db.com/exploits/44498
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2017/CVE-2017-12635.yaml
- https://github.com/assalielmehdi/CVE-2017-12635