CVE-2023-32731 Affecting calico package, versions <3.26.1-r5


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.16% (54th percentile)

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  • Snyk IDSNYK-WOLFILATEST-CALICO-5847001
  • published21 Aug 2023
  • disclosed9 Jun 2023

Introduced: 9 Jun 2023

CVE-2023-32731  (opens in a new tab)

How to fix?

Upgrade Wolfi calico to version 3.26.1-r5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream calico package and not the calico package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. If leveraged, say, between a proxy and a backend, this could lead to requests from the proxy being interpreted as containing headers from different proxy clients - leading to an information leak that can be used for privilege escalation or data exfiltration. We recommend upgrading beyond the commit contained in  https://github.com/grpc/grpc/pull/33005 https://github.com/grpc/grpc/pull/33005

CVSS Scores

version 3.1