#VU71696 Prototype pollution in gRPC - CVE-2020-7768

Vulnerability identifier: #VU71696

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-7768

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
gRPC
Server applications / Frameworks for developing and running applications

Vendor: grpc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources in the loadPackageDefinition component. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

gRPC: before 1.1.8, 1.24.4, 1.1.8, 1.1.8

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External links
https://github.com/grpc/grpc-node/pull/1606
https://github.com/grpc/grpc-node/pull/1605
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038819
https://snyk.io/vuln/SNYK-JS-GRPC-598671
https://snyk.io/vuln/SNYK-JS-GRPCGRPCJS-1038818

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.