#VU80828 Allocation of Resources Without Limits or Throttling in gRPC - CVE-2023-33953

Vulnerability identifier: #VU80828

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-2023-33953

CWE-ID: CWE-770

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 hpack table accounting errors could lead to unwanted disconnects between clients and servers in exceptional cases. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

gRPC: before 1.53.2, 1.53.2

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External links
https://cloud.google.com/support/bulletins#gcp-2023-022

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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.