Security Advisories
FSC-2017-3: Memory data disclosure
Description
F-Secure Internet Gatekeeper returns random memory data when the HTTP GET requests are too long.
Affected Products
- Risk Level (Low/Medium/High/Cricital) High
- F-Secure Internet Gatekeeper 5.50 and below
- F-Secure Internet Gatekeeper Virtual Appliance 5.50.47.16 and below
Platforms
- Risk Level (Low/Medium/High/Cricital) High
- All supported platforms for the affected products
More Information
A vulnerability was discovered in F-Secure Internet Gatekeeper whereby the proxy server returns random memory data as part of the response when the HTTP GET requests contains a long path. The exploit can be triggered both locally and remotely by an attacker. A successful attack will result in the attacker gaining access to random proxy server data mixed with intended response text.
This issue was reported to F-Secure through the Vulnerability Reward Program. No known exploit or attack has been seen in the wild.
Mitigating Factors
HTTP proxy option has to be turned on for a successful exploitation. Furthermore, HTTPS connection is not vulnerable to this attack.
Fix Available
| Product | Versions | Download |
|---|---|---|
| F-Secure Internet Gatekeeper |
5.40 - 5.50 | Hotfix 4: Instructions: Note: |
| F-Secure Internet Gatekeeper Virtual Appliance |
5.50.47.18 |
|
Credits
F-Secure Corporation would like to thank Juho Nurminen for bringing this issue to our attention.
Date Issued: 2017-11-29