Permissions, Privileges, and Access Controls in CouchDB - CVE-2017-12635
Published: January 30, 2019 / Updated: October 30, 2024
Vulnerability identifier: #VU17274
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:A/U:Clear
CVE-ID: CVE-2017-12635
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Apache Foundation
Affected software:
CouchDB
CouchDB
Detailed vulnerability description
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due differences in the Erlang-based JSON parser and JavaScript-based JSON parser that can lead to submitting "_users" documents with duplicate keys for "roles" used for access control within the database, including the "_admin" role. A remote authenticated user can create a specially crafted document and abuse the JSON parser differences result in behavior for two 'roles' keys within a single document and gain administrative privileges within the database.
How to mitigate CVE-2017-12635
Install updates from vendor's website.
Sources
- http://www.securityfocus.com/bid/101868
- https://lists.apache.org/thread.html/6c405bf3f8358e6314076be9f48c89a2e0ddf00539906291ebdf0c67@%3Cdev.couchdb.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2018/01/msg00026.html
- https://security.gentoo.org/glsa/201711-16
- https://www.exploit-db.com/exploits/44498/
- https://www.exploit-db.com/exploits/45019/