PT-2023-1857 · Hyperkit · Hyperkit

Agustin Gianni · Published 2023-02-20 · Updated 2023-03-01 · CVE-2021-32847

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions HyperKit versions 0.20210107 and prior

Description The issue is related to a buffer overflow in memory, which can be exploited by a malicious guest to gain unauthorized access to protected information. This is achieved by abusing the disk driver, potentially leading to the disclosure of the host memory into the virtualized guest.

Recommendations For HyperKit versions 0.20210107 and prior, update to a version that includes the fix committed in cf60095a4d8c3cb2e182a14415467afd356e982f to resolve the issue. As a temporary workaround, consider restricting access to the disk driver to minimize the risk of exploitation.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2023-01456

CVE-2021-32847

Affected Products

Hyperkit

References · 7

• 🔥 https://github.com/moby/hyperkit/blob/2f061e447e1435cdf1b9eda364cea6414f2c606b/src/lib/pci_virtio_block.c#L316 · Exploit
• 🔥 https://securitylab.github.com/advisories/GHSL-2021-058-moby-hyperkit · Exploit
• https://github.com/moby/hyperkit/commit/cf60095a4d8c3cb2e182a14415467afd356e982f · Patch
• https://bdu.fstec.ru/vul/2023-01456 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-32847 · Security Note
• https://osv.dev/vulnerability/CVE-2021-32847 · Vendor Advisory
• https://t.me/cibsecurity/58536 · Telegram Post