CVE-2023-1718 Bitrix24 Denial-of-Service (DoS) via Improper File Stream Access
Unauthenticated attackers can cause denial of service in Bitrix24 by exploiting improper file stream access in the upload endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-1718?
CVE-2023-1718 is a high-severity denial of service vulnerability in Bitrix24, published on 1 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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".
Weakness: CWE-835
Which versions are affected by CVE-2023-1718?
It affects 1 product.
Products include Bitrix24 Bitrix24.
How do I fix CVE-2023-1718?
No fix has been published for CVE-2023-1718 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-1718 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-1718 exists.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Bitrix24
- CVE-2022-27228 Code injection in n/a
- CVE-2020-13484 Server-side request forgery in n/a
- CVE-2023-1717 Bitrix24 Cross-Site Scripting (XSS) via Client-side Prototype Pollution
- CVE-2023-1720 Bitrix24 Stored Cross-Site Scripting (XSS) via File Upload
- CVE-2023-1715 Bitrix24 Stored Cross-Site Scripting (XSS) via Improper Input Neutralization on Invoice Edit Page (1 of 2)
Sources
Also known as GHSA-qx86-33ww-3474.