Square Squash through commit e73f280 contains an insecure deserialization vulnerability that allows unauthenticated attackers to store crafted YAML via the POST /api/1.0/symbolication endpoint. When occurrences referencing the attacker-controlled symbolication UUID are symbolicated, the stored values are passed to YAML.load with SafeYAML in unsafe mode, enabling arbitrary Ruby object deserialization and potential code execution.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
square:squash
References 7
https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/HJ87QX5ifg
Researcher Disclosure
https://github.com/SquareSquash/web/blob/e73f2805f9eb30780a5c213b001f0f4255660f…
NVD
https://github.com/SquareSquash/web/blob/e73f2805f9eb30780a5c213b001f0f4255660f…
NVD
https://github.com/SquareSquash/web/blob/e73f2805f9eb30780a5c213b001f0f4255660f…
NVD
https://github.com/SquareSquash/web/blob/e73f2805f9eb30780a5c213b001f0f4255660f…
NVD
https://github.com/SquareSquash/web
NVD
https://www.vulncheck.com/advisories/square-squash-through-commit-e73f280-unaut…
VulnCheck Advisory: Square Squash through commit e73f280 Unauthenticated YAML Deserialization via Symbolication API