ownCloud Improper Authentication Vulnerability
Executive summary
Public reporting documents: ownCloud Improper Authentication Vulnerability. This is public CTI and does not assess organizational exposure.
Technical analysis
The available public source describes ownCloud Improper Authentication Vulnerability. Technical details are limited to the cited source text and deterministic extracted records; unsupported attribution is excluded.
Evidence and sources
1 source document(s) and 1 evidence fragment(s) support this event; source publication and collection provenance are retained in the corpus.
ownCloud Improper Authentication Vulnerability. ownCloud contains an improper authentication vulnerability that allows an attacker to access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured.
IOCs
https://owncloud.org/security
https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/
https://nvd.nist.gov/vuln/detail/CVE-2023-49105
https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
CVEs and affected products
Public-source record for CVE-2023-49105 in ownCloud Improper Authentication Vulnerability.
ATT&CK mapping
No ATT&CK mapping is available.
Detection content
Sigma rules, YARA rules, Splunk SPL, and KQL detection logic.
Threat hunting
Hypothesis-driven hunt procedures and telemetry checklist.
Remediation
Containment actions, patching notes, and credential steps.
Historical relationships
No published historical relationship is available.
Timeline and change history
Confidence and caveats
0.85
⚠️ Public CTI only; no claim about organizational exposure.
⚠️ Detection logic is generic triage and requires environment-specific tuning.
⚠️ Provider enrichment and ATT&CK mapping are not asserted where unavailable.