High severity · published Mar 5, 2021
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…
8.1
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SP
Spire · Cncf
0.8.1 through 0.8.4; 0.9.0 before 0.9.4; 0.10.0 before 0.10.2; 0.11.0 before 0.11.3; 0.12.0 before 0.12.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-27098
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-27098
Third Party Advisory
https://github.com/spiffe/spire/security/advisories/GHSA-h746-rm5q-8mgq
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