CVE-2021-22550 is a vulnerability in Google Asylo
Published on June 8, 2021
Enclave memory overwrite/overread vulnerability in Asylo UntrustedCacheMalloc::GetBuffer
An attacker can modify the pointers in enclave memory to overwrite arbitrary memory addresses within the secure enclave. It is recommended to update past 0.6.3 or git commit https://github.com/google/asylo/commit/a47ef55db2337d29de19c50cd29b0deb2871d31c
Vulnerability Analysis
CVE-2021-22550 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and a small impact on availability.
Weakness Type
What is an Untrusted pointer offset Vulnerability?
The program performs pointer arithmetic on a valid pointer, but it uses an offset that can point outside of the intended range of valid memory locations for the resulting pointer.
CVE-2021-22550 has been classified to as an Untrusted pointer offset vulnerability or weakness.
Products Associated with CVE-2021-22550
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Affected Versions
Google LLC Asylo:- Version unspecified, <= 0.6.1 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.