Know every vulnerabilitybefore it knows you.
DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.
GHSA-jgm9-xpfj-4fq6
No affected components available
Between September 26, 2021 and October 8, 2021, Radically Open Security conducted a penetration test of OnionShare 2.4, funded by the Open Technology Fund's Red Team lab. This is an issue from that penetration test.
- Vulnerability ID: OTF-013
- Vulnerability type: Improper Hardening
- Threat level: Low
Description:
The filesystem restriction could be hardened and should only allow for pre-defined subfolders.
Technical description:
The Flatpak and Snap configurations allow for read-only access on the whole home folder. The relevant lines in the configuration files are onionshare/snap/snapcraft.yaml#L20 and onionshare/flatpak/org.onionshare.OnionShare.yaml#L19 , respectively.
The encapsulation of filesystem access via these mechanisms should be restricted to pre-defined folders and not allow for access to (configuration) files outside the Onionshare-specific folders.
Sadly Snap does not allow for further restriction to specific folders and therefore cannot be further hardened. By default both frameworks disallow access to hidden folders and therefore reduce the potential impact.
Impact:
An adversary with a primitive that allows for filesystem access from the context of the Onionshare process can access sensitive files in the entire user home folder. This could lead to the leaking of sensitive data. Due to the automatic exclusion of hidden folders, the impact is reduced.
Recommendation:
- Reduce read access in Flatpak configuration.
The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
Browse More
Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.
Checkout DevGuard