QID 355803

Date Published: 2023-08-14

QID 355803: Amazon Linux Security Advisory for grpc : ALAS2023-2023-282

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 (cve-2023-32731) grpc contains a vulnerability whereby a client can cause a termination of connection between a http2 proxy and a grpc server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the grpc server, but is typically allowed by http2 proxies.
We recommend upgrading beyond the commit in https://github.com/grpc/grpc/pull/32309 https://www.google.com/url (cve-2023-32732)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2023-2023-282 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 355803

    CVE-2023-32731 | CVE-2023-32732 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2023-2023-282 amazon linux 2023 URL Logo alas.aws.amazon.com/AL2023/ALAS-2023-282.html
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