Peer-request disruption via persistent HPACK parse errors
Published Aug 6, 2024 · Updated Aug 6, 2024
HPACK parsing in gRPC allows remote attackers to disrupt peer requests and disclose other clients' HTTP header names over proxy connections. The HPACK parser retains an error status after a malformed binary header, so later incrementally indexed headers contaminate the shared dynamic table. Exploitation requires an attacker-controlled gRPC client routed through an HTTP/2 proxy; the bounded effects are failed requests and disclosure of header names, not values.
Summary
What happened
HPACK parsing in gRPC allows remote attackers to disrupt peer requests and disclose other clients' HTTP header names over proxy connections. The HPACK parser retains an error status after a malformed binary header, so later incrementally indexed headers contaminate the shared dynamic table. Exploitation requires an attacker-controlled gRPC client routed through an HTTP/2 proxy; the bounded effects are failed requests and disclosure of header names, not values.
The record
- CVE
- CVE-2024-7246
- Published
- Aug 6, 2024
- Updated
- Aug 6, 2024
- Vendor
- gRPC
- Product
- gRPC
- Classifications
- CWE-440, CAPEC-220, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 6, 2024CVE publishedPublication date reported by the CVE source.
- Aug 6, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.53.0
- Affected versionversion=1.53.1
- Affected versionversion=1.53.2
- Affected versionversion=1.54.0
- Affected versionversion=1.54.1
- Affected versionversion=1.54.3
- Affected versionversion=1.55.0
- Affected versionversion=1.55.1
- Affected versionversion=1.55.3
- Affected versionversion=1.55.4
- Affected versionversion=1.56.0
- Affected versionversion=1.56.1
- Affected versionversion=1.56.2
- Affected versionversion=1.56.3
- Affected versionversion=1.56.4
- Affected versionversion=1.57.0
- Affected versionversion=1.57.1
- Affected versionversion=1.58.0
- Affected versionversion=1.58.1
- Affected versionversion=1.58.2
- Affected versionversion=1.59.0
- Affected versionversion=1.59.1
- Affected versionversion=1.59.2
- Affected versionversion=1.59.3
- Affected versionversion=1.59.4
- Affected versionversion=1.60.0
- Affected versionversion=1.60.1
- Affected versionversion=1.61.0
- Affected versionversion=1.61.1
- Affected versionversion=1.61.2
- Affected versionversion=1.62.0
- Affected versionversion=1.62.1
- Affected versionversion=1.62.2
- Affected versionversion=1.63.0
- Affected versionversion=1.63.1
- Affected versionversion=1.64.0
- Affected versionversion=1.64.1
- Affected versionversion=1.64.2
- Affected versionversion=1.65.0
- Affected versionversion=1.65.1
- Affected versionversion=1.65.2
- Affected versionversion=1.65.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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