lxc up to 2.0.9/3.0.1 lxc-user-nic path error

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in lxc up to 2.0.9/3.0.1. Affected is an unknown function of the component lxc-user-nic. Performing a manipulation results in path error. This vulnerability is identified as CVE-2018-6556. The attack is only possible with local access. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in lxc up to 2.0.9/3.0.1. This affects an unknown functionality of the component lxc-user-nic. The manipulation with an unknown input leads to a path error vulnerability. CWE is classifying the issue as CWE-417. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.

The bug was discovered 08/07/2018. The weakness was released 08/10/2018 (Website). The advisory is shared at usn.ubuntu.com. This vulnerability is uniquely identified as CVE-2018-6556 since 02/01/2018. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111739 (openSUSE Security Update : lxc (openSUSE-2018-865)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 172340 (OpenSUSE Security Update for lxc, lxcfs (openSUSE-SU-2019:1275-1)).

Upgrading to version 3.0.2 eliminates this vulnerability. A possible mitigation has been published 4 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111739) and SecurityFocus (BID 106976†). Entry connected to this vulnerability is available at VDB-130746. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

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

NVD Base Score: 3.3
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Path error
CWE: CWE-417
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: 111739
Nessus Name: openSUSE Security Update : lxc (openSUSE-2018-865)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: lxc 3.0.2

Timelineinfo

02/01/2018 🔍
08/07/2018 +186 days 🔍
08/10/2018 +2 days 🔍
08/10/2018 +0 days 🔍
08/11/2018 +1 days 🔍
08/13/2018 +2 days 🔍
08/15/2018 +2 days 🔍
02/11/2019 +180 days 🔍
05/01/2023 +1540 days 🔍

Sourcesinfo

Advisory: usn-3730-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-6556 (🔍)
GCVE (CVE): GCVE-0-2018-6556
GCVE (VulDB): GCVE-100-122781
SecurityFocus: 106976 - Opencontainers runc CVE-2019-5736 Local Command Execution Vulnerability

See also: 🔍

Entryinfo

Created: 08/11/2018 06:56
Updated: 05/01/2023 12:33
Changes: 08/11/2018 06:56 (75), 03/14/2020 14:00 (4), 05/01/2023 12:25 (3), 05/01/2023 12:33 (1)
Complete: 🔍
Cache ID: 216::103

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