CVE-2024-7246

HPACK table poisoning in gRPC C++, Python & Ruby

Published Aug 6, 2024 CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-48194 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.
History
Type Values Removed Values Added
First Time appeared Grpc
Grpc grpc
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:grpc:grpc:*:*:*:*:*:-:*:*
Vendors & Products Grpc
Grpc grpc
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Type Values Removed Values Added
First Time appeared Redhat rhui
CPEs cpe:/a:redhat:rhui:4::el8
Vendors & Products Redhat rhui
Type Values Removed Values Added
First Time appeared Redhat satellite
Redhat satellite Capsule
CPEs cpe:/a:redhat:satellite:6.16::el8
cpe:/a:redhat:satellite:6.16::el9
cpe:/a:redhat:satellite_capsule:6.16::el8
cpe:/a:redhat:satellite_capsule:6.16::el9
Vendors & Products Redhat satellite
Redhat satellite Capsule
Type Values Removed Values Added
First Time appeared Redhat
Redhat ansible Automation Platform
CPEs cpe:/a:redhat:ansible_automation_platform:2.4::el8
cpe:/a:redhat:ansible_automation_platform:2.4::el9
Vendors & Products Redhat
Redhat ansible Automation Platform
Weaknesses

Sources

Status
PUBLISHED
Assigner
Google
Published
Updated
Aug 6, 2024, 1:17 PM
Reserved
Jul 29, 2024, 8:41 PM
Status
Analyzed
Published
Aug 6, 2024, 11:16 AM
Modified
Jun 17, 2026, 8:19 AM
Severity
Moderate
Public date
Aug 6, 2024, 12:00 AM