Contrast through 1.20.0 contains a panic vulnerability in the transit-engine endpoint's ciphertextContainer.UnmarshalJSON function that fails to validate decoded ciphertext length before slicing. An authenticated workload with a valid mesh certificate can trigger a runtime panic by submitting a short base64-encoded ciphertext, causing log spam and request failures without crashing the process.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
edgelesssys:contrast
References 2
https://github.com/edgelesssys/contrast/security/advisories/GHSA-3ccm-4qq2-5wrp
GitHub Security Advisory (GHSA-3ccm-4qq2-5wrp)
https://www.vulncheck.com/advisories/edgeless-systems-contrast-through-1.20.0-d…
VulnCheck Advisory: Edgeless Systems Contrast through 1.20.0 Denial of Service via ciphertextContainer