Security readout for executives and security teams
Plain-English summary
ownCloud Server before 10.0.2 could reveal valid share tokens for public calendars. An attacker might access a publicly shared calendar without already knowing its token. The available sources do not provide CVSS, active exploitation evidence, or detailed impact beyond calendar exposure.
Executive priority
Treat this as a privacy and access-control issue, especially if shared calendars contain sensitive operational or personal information. It is not sourced as actively exploited, but old ownCloud deployments should be upgraded or decommissioned promptly.
Technical view
CVE-2017-9339 is a logical error in ownCloud Server before 10.0.2 involving disclosure of valid public calendar share tokens. The flaw could bypass the secrecy normally provided by calendar share tokens. No CWE, CVSS vector, exploit details, or KEV listing is provided in the source bundle.
Likely exposure
Exposure is most likely for organizations still running ownCloud Server versions earlier than 10.0.2 and using public calendar sharing. The source bundle does not identify specific CPEs, deployment modes, or configuration prerequisites beyond public calendars.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source states active exploitation. The described attack outcome is unauthorized access to publicly shared calendars without prior token knowledge.
Researcher notes
Evidence is sparse: the bundle provides the CVE description, affected version boundary, vendor advisory URL, and no CVSS or CWE. Avoid assuming broader ownCloud components, exploit availability, or exact token-disclosure mechanics without the vendor advisory details.
Mitigation direction
- Upgrade ownCloud Server to 10.0.2 or later.
- Review ownCloud advisory OC-SA-2017-005 for vendor guidance.
- Inventory public calendar shares on affected instances.
- Rotate or recreate public calendar shares where supported.
- Remove public calendar shares that are no longer required.
Validation and detection
- Confirm all ownCloud Server instances are version 10.0.2 or later.
- Check whether public calendar sharing is enabled.
- List active public calendar shares and owners.
- Review logs for unusual public calendar access where available.
- Document affected systems and remediation status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-9339 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://owncloud.org/security/advisory/?id=oc-sa-2017-005CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.