CVE-2021-36155

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.85% Top 30%
Third-Party Advisory chromium.org Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/grpc/grpc-swift/releases third party advisory release notes
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35303 third party advisory mailing list
https://github.com/grpc/grpc-swift/security/advisories/GHSA-rxmj-hg9v-vp3p third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-36155?
CVE-2021-36155 has been scored as a high severity vulnerability.
How to fix CVE-2021-36155?
To fix CVE-2021-36155, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-36155 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-36155 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.