8.2
HIGH
CVE-2020-35517
Qemu Privilege Escalation Vulnerability
Description

A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices.

INFO

Published Date :

Jan. 28, 2021, 8:15 p.m.

Last Modified :

Feb. 12, 2023, 11:41 p.m.

Remotely Exploitable :

No

Impact Score :

6.0

Exploitability Score :

1.5
Affected Products

The following products are affected by CVE-2020-35517 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 Qemu qemu
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-2020-35517.

URL Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1915823 Issue Tracking Patch Third Party Advisory
https://github.com/qemu/qemu/commit/ebf101955ce8f8d72fba103b5151115a4335de2c Patch Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg05461.html Exploit Mailing List Patch Third Party Advisory
https://security.gentoo.org/glsa/202208-27 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210312-0002/ Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/01/22/1 Exploit Mailing List Patch 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).

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

The following list is the news that have been mention CVE-2020-35517 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-35517 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
  • CVE Modified by [email protected]

    Feb. 12, 2023

    Action Type Old Value New Value
    Changed Description A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices.
    Removed CVSS V3.1 Red Hat, Inc. AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
    Removed Reference https://access.redhat.com/errata/RHBA-2021:0639 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2021:0711 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2021:0743 [No Types Assigned]
    Removed Reference https://access.redhat.com/security/cve/CVE-2020-35517 [No Types Assigned]
    Removed Reference https://virtio-fs.gitlab.io/ [No Types Assigned]
    Added CWE Red Hat, Inc. CWE-269
  • CVE Modified by [email protected]

    Feb. 02, 2023

    Action Type Old Value New Value
    Changed Description A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices. A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
    Added CVSS V3.1 Red Hat, Inc. AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
    Added Reference https://access.redhat.com/errata/RHSA-2021:0743 [No Types Assigned]
    Added Reference https://virtio-fs.gitlab.io/ [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2021:0711 [No Types Assigned]
    Added Reference https://access.redhat.com/security/cve/CVE-2020-35517 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHBA-2021:0639 [No Types Assigned]
    Removed CWE Red Hat, Inc. CWE-269
  • Modified Analysis by [email protected]

    Sep. 30, 2022

    Action Type Old Value New Value
    Changed Reference Type https://security.gentoo.org/glsa/202208-27 No Types Assigned https://security.gentoo.org/glsa/202208-27 Third Party Advisory
  • CVE Modified by [email protected]

    Aug. 15, 2022

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202208-27 [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 08, 2021

    Action Type Old Value New Value
    Removed CWE Red Hat, Inc. CWE-284
    Added CWE Red Hat, Inc. CWE-269
    Removed CWE Reason CWE-284 / CWE from CNA not within 1003 View
  • Reanalysis by [email protected]

    Jun. 01, 2021

    Action Type Old Value New Value
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1915823 Issue Tracking, Vendor Advisory https://bugzilla.redhat.com/show_bug.cgi?id=1915823 Issue Tracking, Patch, Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions up to (including) 5.2.50 OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions from (including) 5.0.0 up to (including) 5.2.50
  • Reanalysis by [email protected]

    May. 21, 2021

    Action Type Old Value New Value
    Changed Reference Type https://github.com/qemu/qemu/commit/ebf101955ce8f8d72fba103b5151115a4335de2c Release Notes https://github.com/qemu/qemu/commit/ebf101955ce8f8d72fba103b5151115a4335de2c Patch, Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:a:qemu:qemu:-:*:*:*:*:*:*:* OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions up to (including) 5.2.50
  • Modified Analysis by [email protected]

    Mar. 31, 2021

    Action Type Old Value New Value
    Changed Reference Type https://security.netapp.com/advisory/ntap-20210312-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20210312-0002/ Third Party Advisory
    Added CWE NIST CWE-269
  • CVE Modified by [email protected]

    Mar. 12, 2021

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20210312-0002/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Feb. 04, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1915823 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1915823 Issue Tracking, Vendor Advisory
    Changed Reference Type https://github.com/qemu/qemu/commit/ebf101955ce8f8d72fba103b5151115a4335de2c No Types Assigned https://github.com/qemu/qemu/commit/ebf101955ce8f8d72fba103b5151115a4335de2c Release Notes
    Changed Reference Type https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg05461.html No Types Assigned https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg05461.html Exploit, Mailing List, Patch, Third Party Advisory
    Changed Reference Type https://www.openwall.com/lists/oss-security/2021/01/22/1 No Types Assigned https://www.openwall.com/lists/oss-security/2021/01/22/1 Exploit, Mailing List, Patch, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:qemu:qemu:-:*:*:*:*:*:*:*
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-2020-35517 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-2020-35517 weaknesses.

Exploit Prediction

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

0.05 }} 0.00%

score

0.19514

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability