Unauthenticated file disclosure via DS2CSF parameter injection
Published Nov 19, 2021 · Updated Aug 4, 2024
Local file inclusion in SAS/IntrNet 9.4 build 1520 and earlier allows remote attackers to read host files through the Application Dispatcher. The default samples library exposes sample.webcsf1.sas, which passes the user-controlled csftyp macro variable to DS2CSF without filtering spaces, commas, or equals signs, allowing an appended ssfile1 function to return a chosen file. No authentication is required; a reachable Application Dispatcher service and the samples library are sufficient, and disclosure is limited to files readable by the web server.
Summary
What happened
Local file inclusion in SAS/IntrNet 9.4 build 1520 and earlier allows remote attackers to read host files through the Application Dispatcher. The default samples library exposes sample.webcsf1.sas, which passes the user-controlled csftyp macro variable to DS2CSF without filtering spaces, commas, or equals signs, allowing an appended ssfile1 function to return a chosen file. No authentication is required; a reachable Application Dispatcher service and the samples library are sufficient, and disclosure is limited to files readable by the web server.
The record
- CVE
- CVE-2021-41569
- Published
- Nov 19, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-829, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 19, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- MindPoint Group SAS/IntrNet file-read reproductionfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo