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CVE-2022-24777

Denial of Service via reachable assertion in grpc-swift

HIGH
7.5
CVSS Score
Published: March 25, 2022 at 04:35 PM UTC
Updated: June 17, 2026 at 04:32 AM UTC
2 products affected across 2 vendorsGrpc SwiftGrpc Swift

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

grpc-swift is the Swift language implementation of gRPC, a remote procedure call (RPC) framework. Prior to version 1.7.2, a grpc-swift server is vulnerable to a denial of service attack via a reachable assertion. This is due to incorrect logic when handling GOAWAY frames. The attack is low-effort: it takes very little resources to construct and send the required sequence of frames. The impact on availability is high as the server will crash, dropping all in flight connections and requests. This issue is fixed in version 1.7.2. There are currently no known workarounds.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Grpc Swift· Linuxfoundation
95%
v < 1.7.2
Affected range stops below 1.7.2, so it looks safe — our inference, not a vendor statement
Grpc Swift· Grpc
60%
v < 1.7.2
Affected range stops below 1.7.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/grpc/grpc-swift/commit/858f977f2a51fca2292f384cf7a108dc2e73a3bd
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/grpc/grpc-swift/security/advisories/GHSA-r6ww-5963-7r95

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-617

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