CVE-2024-7246 HPACK table poisoning in gRPC C++, Python & Ruby

2024-08-0610:14:28

CWE-440

Google

www.cve.org

grpc

http/2 proxy

hpack table

CVSS4

6.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/SC:N/VI:N/SI:N/VA:L/SA:L

EPSS

Percentile

9.5%

JSON

It’s possible for a gRPC client communicating with a HTTP/2 proxy to poison the HPACK table between the proxy and the backend such that other clients see failed requests. It’s also possible to use this vulnerability to leak other clients HTTP header keys, but not values.

This occurs because the error status for a misencoded header is not cleared between header reads, resulting in subsequent (incrementally indexed) added headers in the first request being poisoned until cleared from the HPACK table.

Please update to a fixed version of gRPC as soon as possible. This bug has been fixed in 1.58.3, 1.59.5, 1.60.2, 1.61.3, 1.62.3, 1.63.2, 1.64.3, 1.65.4.

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "gRPC",
    "repo": "https://github.com/grpc",
    "vendor": "Google",
    "versions": [
      {
        "status": "affected",
        "version": "1.53.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.53.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.53.2",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.54.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.54.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.54.3",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.55.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.55.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.55.3",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.55.4",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.56.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.56.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.56.2",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.56.3",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.56.4",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.57.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.57.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.58.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.58.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.58.2",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.59.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.59.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.59.2",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.59.3",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.59.4",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.60.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.60.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.61.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.61.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.62.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.61.2",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.62.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.62.2",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.63.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.63.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.64.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.64.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.64.2",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.65.0",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.65.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.65.2",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "1.65.3",
        "versionType": "custom"
      }
    ]
  }
]