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CVE-2020-8938— Arbitrary enclave memory location write from untrusted environment

Quick assessment

Affected
Google LLC Asylo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Google Asylo是美国Google公司的一个用于开发可信应用程序的框架。该软件支持创建一个可信任的执行环境，包括软件隔离和硬件隔离。 Asylo up to 0.6.0 存在安全漏洞，该漏洞允许攻击者可利用该漏洞通过攻击者可利用该漏洞控制的内容和klinux addr大小的klinuxsockaddr主机调用FromkLinuxSockAddr，这允许攻击者可利用该漏洞从enclave内写入内存值。

CVSS 5.3 · Medium EPSS 0.13% · P3

Possible ATT&CK Techniques 2 AI

T1155 T1055 · Process Injection
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I. Basic Information for CVE-2020-8938

Vulnerability Information
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Vulnerability Title
Arbitrary enclave memory location write from untrusted environment
Source: CVE Program / CVE List V5
Vulnerability Description
An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allows an attacker to make a host call to FromkLinuxSockAddr with attacker controlled content and size of klinux_addr which allows an attacker to write memory values from within the enclave. We recommend upgrading past commit a37fb6a0e7daf30134dbbf357c9a518a1026aa02
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Google Asylo 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Asylo是美国Google公司的一个用于开发可信应用程序的框架。该软件支持创建一个可信任的执行环境，包括软件隔离和硬件隔离。 Asylo up to 0.6.0 存在安全漏洞，该漏洞允许攻击者可利用该漏洞通过攻击者可利用该漏洞控制的内容和klinux addr大小的klinuxsockaddr主机调用FromkLinuxSockAddr，这允许攻击者可利用该漏洞从enclave内写入内存值。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Google LLC Asylo unspecified ~ 0.6.0 -

II. Public POCs for CVE-2020-8938

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III. Intelligence Information for CVE-2020-8938

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Patches & Fixes for CVE-2020-8938 (1)

Same Patch Batch · Google LLC · 2020-12-15 · 10 CVEs total

CVE-2020-8935 5.3 MEDIUM Google Asylo 缓冲区错误漏洞
CVE-2020-8936 5.3 MEDIUM Arbitrary enclave memory overwrite vulnerability in ECall ecall_restore
CVE-2020-8937 5.3 MEDIUM Arbitrary enclave memory location write from untrusted environment
CVE-2020-8939 5.3 MEDIUM Out of Bounds read in Asylo
CVE-2020-8940 5.3 MEDIUM Unchecked buffer overrun in enc_untrusted_recvmsg
CVE-2020-8941 5.3 MEDIUM Unchecked buffer overrun in enc_untrusted_inet_pton
CVE-2020-8942 5.3 MEDIUM Unchecked buffer overrun in enc_untrusted_read
CVE-2020-8943 5.3 MEDIUM Unchecked buffer overrun in enc_untrusted_recvfrom
CVE-2020-8944 5.3 MEDIUM Unchecked buffer overrun in ecall_restore

IV. Related Vulnerabilities

Same product: Asylo
Same vendor: Google LLC