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Advisories

Kyverno 1.11.0 before 1.19.2 Memory Exhaustion via Notary Signature Decompression

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Severity
high
Date
Affecting

  • kyverno >= 1.11.0, < 1.19.2

CWE
  • CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
1seal
Description
Kyverno from 1.11.0 before 1.19.2 contains an unbounded decompression vulnerability in FetchSignatureBlob that allows attackers to exhaust memory by supplying highly compressed notary signature layers. Attackers who control registry referrers or signatures can publish small gzip layers that decompress beyond maxPayloadSize, causing admission controller OOM kills and denial of service.

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