7.8
HIGH
CVE-2021-32845
HyperKit denial of service and potential memory corruption
Description

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.

INFO

Published Date :

Feb. 17, 2023, 11:15 p.m.

Last Modified :

June 26, 2023, 5:47 p.m.

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

1.8
Public PoC/Exploit Available at Github

CVE-2021-32845 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-32845 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Mobyproject hyperkit
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-32845.

URL Resource
https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948 Patch
https://github.com/moby/hyperkit/pull/313 Patch
https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/ Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

None

C JavaScript C++ HTML

Updated: 2 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : June 7, 2024, 3:37 p.m. This repo has been linked 85 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-32845 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-32845 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Reanalysis by [email protected]

    Jun. 26, 2023

    Action Type Old Value New Value
    Removed CWE NIST CWE-908
    Added CWE NIST CWE-252
  • Initial Analysis by [email protected]

    Feb. 28, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948 No Types Assigned https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948 Patch
    Changed Reference Type https://github.com/moby/hyperkit/pull/313 No Types Assigned https://github.com/moby/hyperkit/pull/313 Patch
    Changed Reference Type https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/ No Types Assigned https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/ Third Party Advisory
    Added CWE NIST CWE-908
    Added CPE Configuration OR *cpe:2.3:a:mobyproject:hyperkit:*:*:*:*:*:*:*:* versions up to (including) 0.20210107
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-32845 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-32845 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.04 }} 0.00%

score

0.13238

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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Scope
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