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Change History

Rejetto HFS 3.0.0 through 3.2.0 derives its session-cookie signing key from the non-cryptographic Math.random() generator and discloses outputs of the same generator to unauthenticated clients during login. A remote attacker can collect a small number of login responses, reconstruct the generator's state, recover the signing key, and forge a valid administrator session cookie, leading to full administrative access and remote code execution via the server_code configuration feature.

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-338

https://github.com/rejetto/hfs/releases/tag/v3.2.1

https://www.vulncheck.com/advisories/rejetto-hfs-session-forgery-via-predictable-signing-key

[{"vendor":"rejetto","product":"hfs","defaultStatus":"affected","repo":"https://github.com/rejetto/hfs","versions":[{"version":"3.0.0","lessThan":"3.2.1","versionType":"semver","status":"affected"}]}]