Vulnerability CVE-2021-36155
Published: 2021-07-09

Description:
LengthPrefixedMessageReader in gRPC Swift 1.1.0 and earlier allocates buffers of arbitrary length, which allows remote attackers to cause uncontrolled resource consumption and deny service.

Type:

CWE-120

 (Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'))

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Linuxfoundation -> Grpc swift 

 References:
https://github.com/grpc/grpc-swift/security/advisories/GHSA-rxmj-hg9v-vp3p
https://github.com/grpc/grpc-swift/releases
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35303
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