CVE-2022-31053
moderate-risk
Published 2022-06-13
Biscuit is an authentication and authorization token for microservices architectures. The Biscuit specification version 1 contains a vulnerable algorithm that allows malicious actors to forge valid Γ-signatures. Such an attack would allow an attacker to create a token with any access level. The version 2 of the specification mandates a different algorithm than gamma signatures and as such is not affected by this vulnerability. The Biscuit implementations in Rust, Haskell, Go, Java and Javascript all have published versions following the v2 specification. There are no known workarounds for this issue.
Do I need to act?
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0.23% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Fix available
Upgrade to: 07e230a5704c15c4d6226a9f53368487d9b25c23, 07e230a5704c15c4d6226a9f53368487d9b25c23
9
CVSS 9.8/10
Critical
NETWORK
/ LOW complexity
Affected Products (4)
Biscuit-Auth
Biscuit-Go
Biscuit-Haskell
Biscuit-Java
Affected Vendors
43
/ 100
moderate-risk
Severity
32/34 · Critical
Exploitability
1/34 · Minimal
Exposure
10/34 · Low