runc up to 1.0.0-rc9 Access Control rootfs_linux.go name resolution

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in runc up to 1.0.0-rc9. This affects an unknown function of the file libcontainer/rootfs_linux.go of the component Access Control. The manipulation results in name resolution. This vulnerability was named CVE-2019-19921. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in runc up to 1.0.0-rc9. Affected is an unknown part of the file libcontainer/rootfs_linux.go of the component Access Control. The manipulation with an unknown input leads to a name resolution vulnerability. CWE is classifying the issue as CWE-706. The product uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

runc through 1.0.0-rc9 has Incorrect Access Control leading to Escalation of Privileges, related to libcontainer/rootfs_linux.go. To exploit this, an attacker must be able to spawn two containers with custom volume-mount configurations, and be able to run custom images. (This vulnerability does not affect Docker due to an implementation detail that happens to block the attack.)

The weakness was presented 02/12/2020. This vulnerability is traded as CVE-2019-19921 since 12/22/2019. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 234786 (Amazon Linux AMI : runc (ALAS-2021-1556)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (234786) and CERT Bund (WID-SEC-2022-1089). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • Red Hat OpenShift Container Platform
  • Red Hat OpenShift
  • RESF Rocky Linux

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Name resolution
CWE: CWE-706
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 234786
Nessus Name: Amazon Linux AMI : runc (ALAS-2021-1556)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

12/22/2019 🔍
02/12/2020 +52 days 🔍
02/13/2020 +1 days 🔍
11/30/2025 +2117 days 🔍

Sourcesinfo

Advisory: RHSA-2020:0688
Status: Confirmed

CVE: CVE-2019-19921 (🔍)
GCVE (CVE): GCVE-0-2019-19921
GCVE (VulDB): GCVE-100-150048
CERT Bund: WID-SEC-2022-1089 - Red Hat OpenShift Container Platform: Mehrere Schwachstellen

Entryinfo

Created: 02/13/2020 08:14
Updated: 11/30/2025 13:57
Changes: 02/13/2020 08:14 (35), 02/13/2020 08:19 (17), 03/30/2024 14:53 (19), 03/30/2024 14:56 (1), 04/24/2025 14:25 (8), 11/30/2025 13:57 (8)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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