Apache CouchDB up to 1.6.x/2.1.0 JSON Parser access control

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Apache CouchDB up to 1.6.x/2.1.0 and classified as critical. This issue affects some unknown processing of the component JSON Parser. This manipulation causes access control. The identification of this vulnerability is CVE-2017-12635. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Apache CouchDB up to 1.6.x/2.1.0 and classified as critical. Affected by this vulnerability is an unknown part of the component JSON Parser. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The bug was discovered 11/15/2017. The weakness was shared 11/14/2017 (Website). It is possible to read the advisory at lists.apache.org. This vulnerability is known as CVE-2017-12635 since 08/07/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

It is possible to download the exploit at exploit-db.com. It is declared as highly functional. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 104697 (GLSA-201711-16 : CouchDB: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 20056 (Apache CouchDB Multiple Vulnerabilities.).

Upgrading to version 1.7.0 or 2.1.1 eliminates this vulnerability. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (45019), Tenable (104697) and SecurityFocus (BID 101868†). The entries VDB-109400, VDB-122737 and VDB-128620 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 104697
Nessus Name: GLSA-201711-16 : CouchDB: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703923
OpenVAS Name: CrouchDB Multiple Vulnerabilities (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: couchdb_enum.rb
MetaSploit Name: CouchDB Enum Utility
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: CouchDB 1.7.0/2.1.1
Suricata ID: 2025435
Suricata Class: 🔍
Suricata Message: 🔍

Timelineinfo

08/07/2017 🔍
11/14/2017 +99 days 🔍
11/14/2017 +0 days 🔍
11/14/2017 +0 days 🔍
11/15/2017 +1 days 🔍
11/15/2017 +0 days 🔍
11/19/2017 +4 days 🔍
11/20/2017 +1 days 🔍
12/31/2024 +2598 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: DLA 1252-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-12635 (🔍)
GCVE (CVE): GCVE-0-2017-12635
GCVE (VulDB): GCVE-100-109399
SecurityFocus: 101868 - Apache CouchDB CVE-2017-12635 Remote Privilege Escalation Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 11/15/2017 11:17
Updated: 12/31/2024 07:06
Changes: 11/15/2017 11:17 (75), 12/06/2019 14:45 (15), 01/10/2023 10:53 (4), 12/31/2024 07:06 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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