Vulnerability-Lookup

ubuntu-cve-2023-32731

Vulnerability from osv_ubuntu

Published

2023-06-09 11:15

Modified

2026-05-20 15:02

Summary

Details

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

Severity

7.4 (High)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2023-32731	REPORT
	https://github.com/grpc/grpc/pull/32309	REPORT
	https://www.cve.org/CVERecord?id=CVE-2023-32731	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libgrpc0",
            "binary_version": "0.11.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "grpc",
        "purl": "pkg:deb/ubuntu/grpc@0.11.1-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.2-1",
        "0.11.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libgrpc++1",
            "binary_version": "1.3.2-1.1~build1"
          },
          {
            "binary_name": "libgrpc3",
            "binary_version": "1.3.2-1.1~build1"
          },
          {
            "binary_name": "protobuf-compiler-grpc",
            "binary_version": "1.3.2-1.1~build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "grpc",
        "purl": "pkg:deb/ubuntu/grpc@1.3.2-1.1~build1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.2-1",
        "1.3.2-1ubuntu1",
        "1.3.2-1.1~build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libgrpc++1",
            "binary_version": "1.16.1-1ubuntu5"
          },
          {
            "binary_name": "libgrpc6",
            "binary_version": "1.16.1-1ubuntu5"
          },
          {
            "binary_name": "protobuf-compiler-grpc",
            "binary_version": "1.16.1-1ubuntu5"
          },
          {
            "binary_name": "python3-grpcio",
            "binary_version": "1.16.1-1ubuntu5"
          },
          {
            "binary_name": "ruby-grpc",
            "binary_version": "1.16.1-1ubuntu5"
          },
          {
            "binary_name": "ruby-grpc-tools",
            "binary_version": "1.16.1-1ubuntu5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "grpc",
        "purl": "pkg:deb/ubuntu/grpc@1.16.1-1ubuntu5?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.16.1-1",
        "1.16.1-1ubuntu1",
        "1.16.1-1ubuntu3",
        "1.16.1-1ubuntu4",
        "1.16.1-1ubuntu5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libgrpc++1",
            "binary_version": "1.30.2-3build6"
          },
          {
            "binary_name": "libgrpc10",
            "binary_version": "1.30.2-3build6"
          },
          {
            "binary_name": "protobuf-compiler-grpc",
            "binary_version": "1.30.2-3build6"
          },
          {
            "binary_name": "python3-grpcio",
            "binary_version": "1.30.2-3build6"
          },
          {
            "binary_name": "ruby-grpc",
            "binary_version": "1.30.2-3build6"
          },
          {
            "binary_name": "ruby-grpc-tools",
            "binary_version": "1.30.2-3build6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "grpc",
        "purl": "pkg:deb/ubuntu/grpc@1.30.2-3build6?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.30.2-3",
        "1.30.2-3build1",
        "1.30.2-3build3",
        "1.30.2-3build5",
        "1.30.2-3build6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libgrpc++1.51t64",
            "binary_version": "1.51.1-4.1build5"
          },
          {
            "binary_name": "libgrpc29t64",
            "binary_version": "1.51.1-4.1build5"
          },
          {
            "binary_name": "protobuf-compiler-grpc",
            "binary_version": "1.51.1-4.1build5"
          },
          {
            "binary_name": "python3-grpcio",
            "binary_version": "1.51.1-4.1build5"
          },
          {
            "binary_name": "ruby-grpc",
            "binary_version": "1.51.1-4.1build5"
          },
          {
            "binary_name": "ruby-grpc-tools",
            "binary_version": "1.51.1-4.1build5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "grpc",
        "purl": "pkg:deb/ubuntu/grpc@1.51.1-4.1build5?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.51.1-3build3",
        "1.51.1-3build4",
        "1.51.1-4",
        "1.51.1-4build1",
        "1.51.1-4build2",
        "1.51.1-4.1build3",
        "1.51.1-4.1build4",
        "1.51.1-4.1build5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libgrpc++1.51t64",
            "binary_version": "1.51.1-6build1"
          },
          {
            "binary_name": "libgrpc29t64",
            "binary_version": "1.51.1-6build1"
          },
          {
            "binary_name": "protobuf-compiler-grpc",
            "binary_version": "1.51.1-6build1"
          },
          {
            "binary_name": "python3-grpcio",
            "binary_version": "1.51.1-6build1"
          },
          {
            "binary_name": "ruby-grpc",
            "binary_version": "1.51.1-6build1"
          },
          {
            "binary_name": "ruby-grpc-tools",
            "binary_version": "1.51.1-6build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "grpc",
        "purl": "pkg:deb/ubuntu/grpc@1.51.1-6build1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.51.1-6",
        "1.51.1-6build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libgrpc++1.51t64",
            "binary_version": "1.51.1-8ubuntu1"
          },
          {
            "binary_name": "libgrpc29t64",
            "binary_version": "1.51.1-8ubuntu1"
          },
          {
            "binary_name": "protobuf-compiler-grpc",
            "binary_version": "1.51.1-8ubuntu1"
          },
          {
            "binary_name": "python3-grpcio",
            "binary_version": "1.51.1-8ubuntu1"
          },
          {
            "binary_name": "ruby-grpc",
            "binary_version": "1.51.1-8ubuntu1"
          },
          {
            "binary_name": "ruby-grpc-tools",
            "binary_version": "1.51.1-8ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "grpc",
        "purl": "pkg:deb/ubuntu/grpc@1.51.1-8ubuntu1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.51.1-6build1",
        "1.51.1-7",
        "1.51.1-7ubuntu2",
        "1.51.1-7ubuntu3",
        "1.51.1-8ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "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",
  "id": "UBUNTU-CVE-2023-32731",
  "modified": "2026-05-20T15:02:41Z",
  "published": "2023-06-09T11:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-32731"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/grpc/grpc/pull/32309"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-32731"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-32731"
  ]
}

CVE-2023-32731 (GCVE-0-2023-32731)

Vulnerability from cvelistv5 – Published: 2023-06-09 10:54 – Updated: 2024-09-26 19:12

Title

Information leak in gRPC

Summary

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-440 - Expected Behavior Violation

Assigner

Google

References

2 references

URL	Tags
https://github.com/grpc/grpc/pull/32309
https://github.com/grpc/grpc/pull/33005

Impacted products

2 products

Vendor	Product	Version
Google	gRPC	Affected: 1.53 , ≤ 1.54 (custom)
grpc	grpc	Affected: 1.53 , ≤ 1.54 (custom) cpe:2.3:a:grpc:grpc::::::::

Show details on NVD website

JSON

To clipboard

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            "url": "https://github.com/grpc/grpc/pull/33005"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
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              "cpe:2.3:a:grpc:grpc:*:*:*:*:*:*:*:*"
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                "status": "affected",
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        "metrics": [
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                "options": [
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                  {
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-26T19:07:16.164767Z",
                "version": "2.0.3"
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          }
        ],
        "providerMetadata": {
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          "shortName": "CISA-ADP"
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      "metrics": [
        {
          "cvssV3_1": {
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    "datePublished": "2023-06-09T10:54:08.472Z",
    "dateReserved": "2023-05-12T08:58:54.033Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

ubuntu-cve-2023-32731

Vulnerability from osv_ubuntu

CVE-2023-32731 (GCVE-0-2023-32731)

Tags

Sightings

Nomenclature