Vulnerability Report

CVE-2021-32845

Title: Mobyproject Hyperkit Memory Corruption

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2021-32845.

CWE Category CWE-252
Published Date Feb 17, 2023
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 7.7 CVSS v3.1
Exploit Probability (EPSS)
0.07%

Vulnerability Summary

CVE-2021-32845: HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, the implementation of `qnotify` at `pci_vtrnd_notify` fails to check the return value of `vq_getchain`. This leads to `struct iovec iov;` being uninitialized and used to read memory in `len = (int) read(sc->vrsc_fd, iov.iov_base, iov.iov_len);` when an attacker is able to make `vq_getchain` fail. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit 41272a980197917df8e58ff90642d14dec8fe948.

Impacted Vendors

M
mobyproject 1

Reference Links

https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948 https://github.com/moby/hyperkit/pull/313 https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/ https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948 https://github.com/moby/hyperkit/pull/313 https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.7
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.8
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-32845 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected Stack

No specific products linked.