CVE-2023-33953

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Source
https://nvd.nist.gov/vuln/detail/CVE-2023-33953
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-33953.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-33953
Aliases
Related
Published
2023-08-09T13:15:09Z
Modified
2025-02-19T03:35:18.315280Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

gRPC contains a vulnerability that allows hpack table accounting errors could lead to unwanted disconnects between clients and servers in exceptional cases/ Three vectors were found that allow the following DOS attacks:

  • Unbounded memory buffering in the HPACK parser
  • Unbounded CPU consumption in the HPACK parser

The unbounded CPU consumption is down to a copy that occurred per-input-block in the parser, and because that could be unbounded due to the memory copy bug we end up with an O(n^2) parsing loop, with n selected by the client.

The unbounded memory buffering bugs:

  • The header size limit check was behind the string reading code, so we needed to first buffer up to a 4 gigabyte string before rejecting it as longer than 8 or 16kb.
  • HPACK varints have an encoding quirk whereby an infinite number of 0’s can be added at the start of an integer. gRPC’s hpack parser needed to read all of them before concluding a parse.
  • gRPC’s metadata overflow check was performed per frame, so that the following sequence of frames could cause infinite buffering: HEADERS: containing a: 1 CONTINUATION: containing a: 2 CONTINUATION: containing a: 3 etc…
References

Affected packages

Debian:11 / grpc

Package

Name
grpc
Purl
pkg:deb/debian/grpc?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.30.2-3
1.30.2-4
1.30.2-4+0.riscv64.1
1.30.2-4+0.riscv64.2
1.44.0-1
1.44.0-2
1.44.0-3
1.50.1-1
1.51.0-1
1.51.1-1
1.51.1-2
1.51.1-3
1.51.1-4
1.51.1-4.1~exp1
1.51.1-4.1
1.51.1-5
1.59.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / grpc

Package

Name
grpc
Purl
pkg:deb/debian/grpc?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.51.1-3
1.51.1-4
1.51.1-4.1~exp1
1.51.1-4.1
1.51.1-5
1.59.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / grpc

Package

Name
grpc
Purl
pkg:deb/debian/grpc?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.51.1-3
1.51.1-4
1.51.1-4.1~exp1
1.51.1-4.1
1.51.1-5
1.59.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Git / github.com/grpc/grpc

Affected ranges

Type
GIT
Repo
https://github.com/grpc/grpc
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
afb307fb89ed83f358d82b5d359034a039a95e66
Type
GIT
Repo
https://github.com/grpc/grpc-go
Events
Introduced
0ed709c4a71d08e5877b4bfb41c2747b0d1c3240
Fixed
faab8736bf73291f92b867d5dae31c927d53d508

Affected versions

1.*

1.33.1

objective-c-v1.*

objective-c-v1.0.0-pre1
objective-c-v1.0.2

Other

release-0_10_0
release-0_11
release-0_11_0
release-0_11_1
release-0_12
release-0_12_0
release-0_13_0
release-0_13_1
release-0_14
release-0_14_0
release-0_14_1
release-0_15_0
release-0_15_1
release-0_5_0
release-0_6
release-0_6_0
release-0_9_0
release_test

release-0_10_0-objectivec-0.*

release-0_10_0-objectivec-0.6.0

release-0_11_1-objectivec-0.*

release-0_11_1-objectivec-0.11.1

release-0_12_0-objectivec-0.*

release-0_12_0-objectivec-0.12.0

release-0_14_0-objective-c-0.*

release-0_14_0-objective-c-0.14.0

release-0_14_0-objectivec-0.*

release-0_14_0-objectivec-0.14.0

release-0_9_1-objectivec-0.*

release-0_9_1-objectivec-0.5.1

v0.*

v0.15.0

v1.*

v1.0.0
v1.0.0-pre2
v1.0.1
v1.0.1-pre1
v1.1.0
v1.1.0-pre1
v1.1.1
v1.1.2
v1.1.3
v1.1.4
v1.10.0
v1.10.0-pre1
v1.10.0-pre2
v1.10.1
v1.10.1-pre1
v1.11.0
v1.11.0-pre1
v1.11.0-pre2
v1.12.0
v1.12.0-pre1
v1.12.1
v1.13.0
v1.13.0-pre1
v1.13.0-pre2
v1.13.0-pre3
v1.14.0
v1.14.0-pre1
v1.14.0-pre2
v1.14.1
v1.15.0
v1.15.0-pre1
v1.15.1
v1.16.0
v1.16.0-pre1
v1.16.1
v1.16.1-pre1
v1.17.0
v1.17.0-pre1
v1.17.0-pre2
v1.17.0-pre3
v1.17.1
v1.17.1-pre1
v1.17.2
v1.18.0
v1.18.0-pre1
v1.19.0
v1.19.0-pre1
v1.19.1
v1.2.0
v1.2.0-pre2
v1.2.1
v1.2.2
v1.2.3
v1.2.4
v1.20.0
v1.20.0-pre1
v1.20.0-pre2
v1.20.0-pre3
v1.20.1
v1.21.0
v1.21.0-pre1
v1.21.1
v1.21.2
v1.21.3
v1.21.3-pre1
v1.21.4
v1.21.4-pre1
v1.22.0
v1.22.0-pre1
v1.23.0
v1.23.0-pre1
v1.24.0
v1.24.0-pre1
v1.24.0-pre2
v1.24.1
v1.24.2
v1.24.3
v1.25.0
v1.25.0-pre1
v1.26.0
v1.26.0-pre1
v1.29.0
v1.29.1
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.30.0
v1.30.0-pre1
v1.30.1
v1.30.2
v1.31.0
v1.31.0-pre1
v1.31.0-pre2
v1.31.1
v1.32.0
v1.32.0-pre1
v1.33.0
v1.33.0-pre1
v1.33.0-pre2
v1.33.1
v1.33.2
v1.34.0
v1.34.0-pre1
v1.35.0-pre1
v1.4.0
v1.4.0-pre1
v1.4.1
v1.41.0-pre1
v1.53.0
v1.53.0-pre1
v1.53.0-pre2
v1.53.1
v1.56.0
v1.56.0-dev
v1.56.1
v1.6.0
v1.6.0-pre1
v1.6.1
v1.7.0
v1.7.1
v1.7.2
v1.8.0
v1.8.0-pre2
v1.8.1
v1.8.2
v1.8.3
v1.8.4
v1.9.0
v1.9.0-pre1
v1.9.0-pre2
v1.9.0-pre3
v1.9.1