CVE - CVE-2017-12635

CVE-ID
CVE-2017-12635	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
BID:101868 URL:http://www.securityfocus.com/bid/101868 CONFIRM:https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbmu03935en_us EXPLOIT-DB:44498 URL:https://www.exploit-db.com/exploits/44498/ EXPLOIT-DB:45019 URL:https://www.exploit-db.com/exploits/45019/ GENTOO:GLSA-201711-16 URL:https://security.gentoo.org/glsa/201711-16 MLIST:[debian-lts-announce] 20180121 [SECURITY] [DLA 1252-1] couchdb security update URL:https://lists.debian.org/debian-lts-announce/2018/01/msg00026.html MLIST:[dev] 20171114 Apache CouchDB CVE-2017-12635 and CVE-2017-12636 URL:https://lists.apache.org/thread.html/6c405bf3f8358e6314076be9f48c89a2e0ddf00539906291ebdf0c67@%3Cdev.couchdb.apache.org%3E
Assigning CNA
Apache Software Foundation
Date Record Created
20170807	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20170807)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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