CVE-2020-8937— Arbitrary enclave memory location write from untrusted environment
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I. Basic Information for CVE-2020-8937
Vulnerability Information
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Vulnerability Title
Arbitrary enclave memory location write from untrusted environment
Source: NVD (National Vulnerability Database)
Vulnerability Description
An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allows an attacker to make a host call to enc_untrusted_create_wait_queue that uses a pointer queue that relies on UntrustedLocalMemcpy, which fails to validate where the pointer is located. This allows an attacker to write memory values from within the enclave. We recommend upgrading past commit a37fb6a0e7daf30134dbbf357c9a518a1026aa02
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: NVD (National Vulnerability Database)
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。 Google Asylo 版本 0.6.0 及 0.6.0 之前版本中存在安全漏洞，该漏洞允许攻击者可利用该漏洞对enc不可信创建等待队列进行主机调用，该队列使用依赖于UntrustedLocalMemcpy的指针队列，该指针队列无法验证指针的位置。这允许攻击者可利用该漏洞从enclave内部写入内存值。
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 | 0.6.0 ~ 0.6.0 | - |
II. Public POCs for CVE-2020-8937
| # | POC Description | Source Link | Shenlong Link |
|---|
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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-2020-8938 | 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
- CVE-2021-22552
Memory overread secure enclave in Asylo 0.6.2 - CVE-2021-22550
Enclave memory overwrite/overread vulnerability in Asylo Unt - CVE-2021-22549
Arbitrary enclave memory overwrite vulnerability in Asylo Tr - CVE-2021-22548
Arbitrary enclave memory overread vulnerability in Asylo Tru - CVE-2020-8944
Unchecked buffer overrun in ecall_restore
Same vendor: Google LLC
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Same weakness: CWE-120
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