GHSA-496j-2rq6-j6cc

Suggest an improvement
Source
https://github.com/advisories/GHSA-496j-2rq6-j6cc
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/08/GHSA-496j-2rq6-j6cc/GHSA-496j-2rq6-j6cc.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-496j-2rq6-j6cc
Aliases
Published
2023-08-09T15:30:15Z
Modified
2024-07-30T21:46:22.811443Z
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
Excessive Iteration in gRPC
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

PyPI / grpcio

Package

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.53.2

Affected versions

0.*

0.3.0
0.4.0a0
0.4.0a1
0.4.0a2
0.4.0a3
0.4.0a4
0.4.0a5
0.4.0a6
0.4.0a7
0.4.0a8
0.4.0a13
0.4.0a14
0.4.0
0.5.0a0
0.5.0a1
0.5.0a2
0.9.0a0
0.9.0a1
0.10.0a0
0.11.0b0
0.11.0b1
0.12.0b0
0.12.0b8
0.13.0
0.13.1rc1
0.13.1
0.14.0rc1
0.14.0
0.15.0

1.*

1.0.0rc1
1.0.0rc2
1.0.0
1.0.1rc1
1.0.1
1.0.2
1.0.3
1.0.4
1.1.0
1.1.3
1.2.0
1.2.1
1.3.0
1.3.3
1.3.5
1.4.0
1.6.0
1.6.3
1.7.0
1.7.3
1.8.1
1.8.2
1.8.3
1.8.4
1.8.6
1.9.0rc1
1.9.0rc2
1.9.0rc3
1.9.0
1.9.1
1.10.0rc2
1.10.0
1.10.1rc1
1.10.1rc2
1.10.1
1.11.0rc1
1.11.0rc2
1.11.0
1.11.1rc1
1.11.1
1.12.0rc1
1.12.0
1.12.1
1.13.0rc1
1.13.0rc2
1.13.0rc3
1.13.0
1.14.0rc1
1.14.0rc2
1.14.0
1.14.1
1.14.2rc1
1.14.2
1.15.0rc1
1.15.0
1.16.0rc1
1.16.0
1.16.1
1.17.0
1.17.1
1.18.0
1.19.0
1.20.0rc1
1.20.0rc2
1.20.0rc3
1.20.0
1.20.1
1.21.0rc1
1.21.1rc1
1.21.1
1.22.0rc1
1.22.0
1.22.1
1.23.0rc1
1.23.0
1.23.1
1.24.0rc1
1.24.0
1.24.1
1.24.3
1.25.0rc1
1.25.0
1.26.0rc1
1.26.0
1.27.0rc1
1.27.0rc2
1.27.1
1.27.2
1.28.0rc1
1.28.0rc2
1.28.1
1.29.0
1.30.0
1.31.0
1.32.0
1.33.1
1.33.2
1.34.0rc1
1.34.0
1.34.1
1.35.0rc1
1.35.0
1.36.0rc1
1.36.0
1.36.1
1.37.0rc1
1.37.0
1.37.1
1.38.0rc1
1.38.0
1.38.1
1.39.0rc1
1.39.0
1.40.0rc1
1.40.0
1.41.0rc2
1.41.0
1.41.1
1.42.0rc1
1.42.0
1.43.0rc1
1.43.0
1.44.0rc1
1.44.0rc2
1.44.0
1.45.0rc1
1.45.0
1.46.0rc1
1.46.0rc2
1.46.0
1.46.1
1.46.3
1.46.5
1.47.0rc1
1.47.0
1.47.2
1.47.5
1.48.0rc1
1.48.0
1.48.1
1.48.2
1.49.0rc1
1.49.0rc3
1.49.0
1.49.1
1.50.0rc1
1.50.0
1.51.0rc1
1.51.0
1.51.1
1.51.3
1.52.0rc1
1.52.0
1.53.0rc2
1.53.0
1.53.1

PyPI / grpcio

Package

Affected ranges

Type
ECOSYSTEM
Events
Introduced
1.54.0
Fixed
1.54.3

Affected versions

1.*

1.54.0
1.54.2

PyPI / grpcio

Package

Affected ranges

Type
ECOSYSTEM
Events
Introduced
1.55.0
Fixed
1.55.2

Affected versions

1.*

1.55.0

PyPI / grpcio

Package

Affected ranges

Type
ECOSYSTEM
Events
Introduced
1.56.0
Fixed
1.56.2

Affected versions

1.*

1.56.0

RubyGems / grpc

Package

Name
grpc
Purl
pkg:gem/grpc

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.53.2

Affected versions

0.*

0.5.0
0.6.0
0.6.1
0.9.2
0.9.3
0.9.4
0.10.0
0.11.0
0.12.0
0.13.0.pre1.1
0.13.0
0.13.1.pre1
0.13.1
0.14.1.pre1
0.14.1
0.15.0

1.*

1.0.0.pre1
1.0.0.pre2
1.0.0
1.0.1.pre1
1.0.1
1.1.2
1.2.0.pre1
1.2.0
1.2.1.pre1
1.2.1.pre2
1.2.2
1.2.5
1.3.4
1.4.0
1.4.1
1.4.5
1.6.0.pre1
1.6.0
1.6.2
1.6.4
1.6.6
1.6.7
1.7.0.pre1
1.7.0
1.7.1
1.7.2
1.7.3
1.8.0
1.8.3
1.8.6
1.8.7
1.9.0.pre1
1.9.0.pre2
1.9.0.pre3
1.9.1
1.10.0.pre1
1.10.0.pre2
1.10.0
1.11.0.pre2
1.11.0
1.11.1
1.12.0
1.13.0.pre1
1.13.0.pre3
1.13.0
1.14.0
1.14.1
1.14.2.pre1
1.14.2
1.15.0.pre1
1.15.0
1.16.0.pre1
1.16.0
1.17.0.pre1
1.17.0
1.17.1
1.18.0.pre1
1.18.0
1.19.0.pre1
1.19.0
1.20.0.pre1
1.20.0
1.21.0
1.22.0.pre1
1.22.0
1.22.1
1.23.0.pre1
1.23.0
1.23.1
1.24.0.pre1
1.24.0
1.25.0.pre1
1.25.0
1.26.0.pre1
1.26.0
1.27.0.pre1
1.27.0
1.28.0.pre1
1.28.0.pre2
1.28.0
1.30.0.pre1
1.30.0
1.30.1
1.30.2
1.31.0.pre1
1.31.0.pre2
1.31.1
1.32.0.pre1
1.32.0
1.33.0.pre1
1.34.0
1.35.0.pre1
1.35.0
1.36.0
1.37.0.pre1
1.37.0
1.37.1
1.38.0.pre1
1.38.0
1.39.0.pre1
1.39.0
1.40.0.pre1
1.40.0
1.41.0.pre2
1.41.0
1.41.1
1.42.0.pre1
1.42.0
1.43.1
1.44.0.pre2
1.45.0
1.46.2
1.46.3
1.47.0
1.48.0.pre1
1.48.0
1.49.0.pre1
1.49.1
1.50.0.pre1
1.50.0
1.51.0
1.52.0.pre2
1.52.0
1.52.2
1.53.0.pre2
1.53.0
1.53.1

RubyGems / grpc

Package

Name
grpc
Purl
pkg:gem/grpc

Affected ranges

Type
ECOSYSTEM
Events
Introduced
1.54.0
Fixed
1.54.3

Affected versions

1.*

1.54.0
1.54.2

RubyGems / grpc

Package

Name
grpc
Purl
pkg:gem/grpc

Affected ranges

Type
ECOSYSTEM
Events
Introduced
1.55.0
Fixed
1.55.2

Affected versions

1.*

1.55.0

RubyGems / grpc

Package

Name
grpc
Purl
pkg:gem/grpc

Affected ranges

Type
ECOSYSTEM
Events
Introduced
1.56.0
Fixed
1.56.2

Affected versions

1.*

1.56.0