What kind of vulnerability is it? Who is impacted? This issue impacts every Soft Serve instance. A critical authentication bypass allows an attacker to impersonate any user (including Admin) by "offering" the victim's public key during the SSH handshake before authenticating with their own valid key. This occurs because the user identity is stored in the session context during the "offer" phase and is not cleared if that specific authentication …
This advisory duplicates another.
An authorization bypass in the LFS lock deletion endpoint allows any authenticated user with repository write access to delete locks owned by other users by setting the force flag. The vulnerable code path processes force deletions before retrieving user context, bypassing ownership validation entirely.
SUMMARY We have identified and verified an SSRF vulnerability where webhook URLs are not validated, allowing repository administrators to create webhooks targeting internal services, private networks, and cloud metadata endpoints. AFFECTED COMPONENTS (VERIFIED) Webhook Creation (pkg/ssh/cmd/webhooks.go:125) Backend CreateWebhook (pkg/backend/webhooks.go:17) Backend UpdateWebhook (pkg/backend/webhooks.go:122) Webhook Delivery (pkg/webhook/webhook.go:97) IMPACT This vulnerability allows repository administrators to perform SSRF attacks, potentially enabling: a) Cloud Metadata Theft - Access AWS/Azure/GCP credentials via 169.254.169.254 b) Internal Network …
In several places where the user can insert data (e.g. names), ANSI escape sequences are not being removed, which can then be used, for example, to show fake alerts. In the same token, git messages, when printed, are also not being sanitized. Places in which this was found: Repository Description (pkg/backend/repo.go - SetDescription) Repository Project Name (pkg/backend/repo.go - SetProjectName) Git Commit Author Names (pkg/ssh/cmd/commit.go:69) Git Commit Messages (pkg/ssh/cmd/commit.go:71) Access Token …
Attackers can create/override arbitrary files with uncontrolled data. For a PoC, spin up an instance of soft-serve as explained in the README, and execute the following command: ssh -p23231 localhost repo commit icecream – –output=/tmp/pwned It should have created a file in /tmp/pwned.
This advisory duplicates another.
Path traversal attack gives access to existing non-admin users to access and take over other user's repositories. A malicious user then can modify, delete, and arbitrarily repositories as if they were an admin user without explicitly giving them permissions.
Any servers using soft-serve server and git
Impact A security vulnerability in Soft Serve could allow an unauthenticated, remote attacker to bypass public key authentication when keyboard-interactive SSH authentication is active, through the allow-keyless setting, and the public key requires additional client-side verification for example using FIDO2 or GPG. This is due to insufficient validation procedures of the public key step during SSH request handshake, granting unauthorized access if the keyboard-interaction mode is utilized. An attacker could …