Vulnerability Details CVE-2021-27098
In SPIRE 0.8.1 through 0.8.4 and before versions 0.9.4, 0.10.2, 0.11.3 and 0.12.1, specially crafted requests to the FetchX509SVID RPC of SPIRE Server’s Legacy Node API can result in the possible issuance of an X.509 certificate with a URI SAN for a SPIFFE ID that the agent is not authorized to distribute. Proper controls are in place to require that the caller presents a valid agent certificate that is already authorized to issue at least one SPIFFE ID, and the requested SPIFFE ID belongs to the same trust domain, prior to being able to trigger this vulnerability. This issue has been fixed in SPIRE versions 0.8.5, 0.9.4, 0.10.2, 0.11.3 and 0.12.1.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 31.5%
CVSS Severity
CVSS v3 Score 8.1
CVSS v2 Score 5.5
References
Products affected by CVE-2021-27098
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cpe:2.3:a:cncf:spire:0.10.0
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cpe:2.3:a:cncf:spire:0.10.1
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cpe:2.3:a:cncf:spire:0.11.0
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cpe:2.3:a:cncf:spire:0.11.1
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cpe:2.3:a:cncf:spire:0.11.2
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cpe:2.3:a:cncf:spire:0.12.0
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cpe:2.3:a:cncf:spire:0.8.1
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cpe:2.3:a:cncf:spire:0.8.2
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cpe:2.3:a:cncf:spire:0.8.3
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cpe:2.3:a:cncf:spire:0.8.4
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cpe:2.3:a:cncf:spire:0.9.0
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cpe:2.3:a:cncf:spire:0.9.1
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cpe:2.3:a:cncf:spire:0.9.2
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cpe:2.3:a:cncf:spire:0.9.3