CVE-2017-12635 Details
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.
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Exploit prediction scoring system (EPSS) score for CVE-2017-12635
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
94.06 Probability of exploitation activity being observed over the next 30 days (100th percentile)
CVSS score for CVE-2017-12635
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
9.8 Critical
Products affected by CVE-2017-12635
CouchDB 1.1.1
CouchDB 1.2.0
CouchDB 1.2.1
CouchDB 1.4.0
CouchDB 1.5.0
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Low
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CVE-2017-12635 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 340 32.57%
CN 242 23.18%
DE 73 6.99%
GB 66 6.32%
SG 63 6.03%
JP 45 4.31%
HK 20 1.92%
TH 19 1.82%
AE 18 1.72%
MY 15 1.44%

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CVE-2017-12635 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 769 89.31%
Telecommunications 84 9.76%
Education 4 0.46%
Manufacturing 3 0.35%
Healthcare/Wellness 1 0.12%

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