CVE-2017-12635 (GCVE-0-2017-12635)

Vulnerability from cvelistv5 – Published: 2017-11-14 20:00 – Updated: 2024-09-17 01:31
VLAI Shadowserver Previdian
Summary
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.
Severity
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • Information Disclosure
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1169 records in the last 180 days details
References
URL Tags
https://www.exploit-db.com/exploits/44498/ exploitx_refsource_EXPLOIT-DB
https://www.exploit-db.com/exploits/45019/ exploitx_refsource_EXPLOIT-DB
https://lists.apache.org/thread.html/6c405bf3f835… mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/201711-16 vendor-advisoryx_refsource_GENTOO
https://lists.debian.org/debian-lts-announce/2018… mailing-listx_refsource_MLIST
http://www.securityfocus.com/bid/101868 vdb-entryx_refsource_BID
https://support.hpe.com/hpsc/doc/public/display?d… x_refsource_CONFIRM
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache CouchDB Affected: 1.2.0 to 1.6.1
Affected: 2.0.0 to 2.1.0
guessed Create a notification for this product.
Date Public
2017-11-14 00:00
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 3f8aee59-58b8-48ae-9a44-1a532441fe6a

Vulnerability ID: CVE-2017-12635

Status: Confirmed

Status Updated: 2026-11-05 00:00 UTC

Exploited: Yes

Characteristics
Severity: 98.0
Timestamps
First Seen: 2023-10-14
Asserted: 2023-10-14
Last Seen: 2026-11-05
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Apache / CouchDB | Class: database | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: no | Honeypot connections on 2026-11-05: 149
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 2
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class database
7D Avg 1
Vendor Apache
30D Avg 1
90D Avg 1
Product CouchDB
Cisa Kev no
Connections 149
Observation Date 2026-11-05
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical
References
Created: 2026-07-01 05:53 UTC | Updated: 2026-11-07 01:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5af0d877-87d3-48ba-85e4-66ec0c880813

Vulnerability ID: CVE-2017-12635

Status: Confirmed

Status Updated: 2025-04-25 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-04-25
Asserted: 2025-04-25
Scope
Notes: KEVIntel entry: 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... | Affected: Apache Software Foundation / Apache CouchDB | CVSS: 9.8 (CRITICAL) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title 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...
Vendor Apache Software Foundation
Product Apache CouchDB
Added Date 2025-04-25T00:00:00.000Z
Cvss Score 9.8
Epss Score None
Cvss Severity CRITICAL
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-23 11:13 UTC | Updated: 2026-06-23 11:13 UTC
Show details on NVD website
To clipboard 

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    "redhat_vex": {
      "current_release_date": "2025-11-21T17:13:04+00:00",
      "cve": "CVE-2017-12635",
      "id": "CVE-2017-12635",
      "initial_release_date": "2017-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "couchdb: Privilege escalation via _users documents with duplicate keys for \u0027roles\u0027",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2017/cve-2017-12635.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.