PT-2020-20382 · Google · Asylo

Kang Li + 3 · Published 2020-12-15 · Updated 2020-12-17 · CVE-2020-8944

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions Asylo versions up to 0.6.0

Description An arbitrary memory write issue allows an untrusted attacker to make a call to ecall restore() using the attribute output which fails to check the range of a pointer. An attacker can use this pointer to write to arbitrary memory addresses, including those within the secure enclave.

Recommendations For Asylo versions up to 0.6.0, upgrade past commit 382da2b8b09cbf928668a2445efb778f76bd9c8a. As a temporary workaround, consider restricting the use of the ecall restore() function until a patch is available.

Exploit

Fix

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-120

CWE-787

Related Identifiers

CVE-2020-8944

Affected Products

Asylo

References · 4

• 🔥 https://github.com/google/asylo/commit/382da2b8b09cbf928668a2445efb778f76bd9c8a · Exploit
• https://osv.dev/vulnerability/CVE-2020-8944 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8944 · Security Note
• https://t.me/cibsecurity/20812 · Telegram Post