CVE-2020-8943— Unchecked buffer overrun in enc_untrusted_recvfrom
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I. Basic Information for CVE-2020-8943
Vulnerability Information
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Vulnerability Title
Unchecked buffer overrun in enc_untrusted_recvfrom
Source: NVD (National Vulnerability Database)
Vulnerability Description
An arbitrary memory read vulnerability in Asylo versions up to 0.6.0 allows an untrusted attacker to make a call to enc_untrusted_recvfrom whose return size was not validated against the requested size. The parameter size is unchecked allowing the attacker to read memory locations outside of the intended buffer size including memory addresses within the secure enclave. We recommend upgrading past commit 6e158d558abd3c29a0208e30c97c9a8c5bd4230f
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。 Asylo up to 0.6.0 存在安全漏洞，该漏洞允许不受信任的攻击者可利用该漏洞调用enc不受信任的recvfrom，其返回大小没有根据请求的大小进行验证。参数大小未检查，允许攻击者可利用该漏洞读取预期缓冲区大小之外的内存位置，包括安全enclave中的内存地址。
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-2020-8943
| # | 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-2020-8937 | 5.3 MEDIUM | Arbitrary enclave memory location write from untrusted environment |
| 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-2020-8944 | 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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