TI-2022-08591 Aliases CVE-2022-24777 GHSA-r6ww-5963-7r95

Denial of Service via reachable assertion in grpc-swift

MEDIUM 41CWE-617Published 2022-03-25 · Updated 2025-04-23

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-617.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01177 67th percentileScored 2026-11-07

Fix Fixed grpc-swift (grpc): 1.7.2github.com/grpc/grpc-swift (SwiftURL): 1.7.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
grpc	grpc-swift	before 1.7.2	1.7.2	Patch available	CNA
—	github.com/grpc/grpc-swift (SwiftURL)	before 1.7.2	1.7.2	Patch available	GHSA-r6ww-5963-7r95

grpc-swift Vendorgrpc Affected before 1.7.2 Fixed in 1.7.2 Patch available CNA
github.com/grpc/grpc-swift (SwiftURL) Vendor— Affected before 1.7.2 Fixed in 1.7.2 Patch available GHSA-r6ww-5963-7r95

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:linuxfoundation:grpc_swift::::::::	before 1.7.2	Vulnerable	backstage

cpe:2.3:a:linuxfoundation:grpc_swift:*:*:*:*:*:*:*:* Versions before 1.7.2 Vulnerable ·backstage

Remediation

Fix · CNA grpc-swift (grpc) Fixed in 1.7.2
Fix · GHSA-r6ww-5963-7r95 github.com/grpc/grpc-swift (SwiftURL) Fixed in 1.7.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2022-24777
2026-10-03 Alias added: GHSA-r6ww-5963-7r95

References

Patch 1

https://github.com/grpc/grpc-swift/commit/858f977f2a51fca2292f384cf7a108dc2e73a3bd

Advisory 2

Other 1

https://github.com/grpc/grpc-swift

TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
TI-2026-25614 gRPC-Go has an authorization bypass via missing leading slash in :path CVSS 3.1CRITICAL 9.1
TI-2020-06285 Prototype pollution in grpc CVSS 3.1CRITICAL 9.8
TI-2017-05916 Google gRPC before 2017-03-29 has an out-of-bounds write caused by a heap-based… CVSS 3.0CRITICAL 9.8
TI-2017-05476 Google gRPC before 2017-02-22 has an out-of-bounds write caused by a heap-based buffer… CVSS 3.0CRITICAL 9.8
TI-2017-06843 Google gRPC before 2017-04-05 has an out-of-bounds write caused by a heap-based buffer… CVSS 3.0CRITICAL 9.8

See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences