CVE-2023-1718
Published: 01 November 2023
Summary
CVE-2023-1718 is a high-severity Infinite Loop (CWE-835) vulnerability in Bitrix24 Bitrix24. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 2.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2023-1718 is an improper file stream access vulnerability in the Bitrix24 22.0.300 component located at /desktop_app/file.ajax.php?action=uploadfile. The flaw, tracked under CWE-835, permits remote manipulation of the tmp_url parameter and produces a high-impact denial-of-service condition without requiring authentication or user interaction. The issue received a CVSS 3.1 base score of 7.5 reflecting network attack vector, low complexity, and availability impact only.
Unauthenticated attackers with network access can submit a crafted tmp_url value to the affected endpoint, triggering resource exhaustion that renders the application unavailable to legitimate users. No privileges or special conditions beyond a standard HTTP request are needed for successful exploitation.
Public references point to detailed technical analysis from Star Labs but do not describe vendor patches or configuration work-arounds in the supplied data. The associated EPSS score has remained flat at 0.5115 with no material increase after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-23941
Vulnerability details
Improper file stream access in /desktop_app/file.ajax.php?action=uploadfile in Bitrix24 22.0.300 allows unauthenticated remote attackers to cause denial-of-service via a crafted "tmp_url".
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.