SuSE Linux Enterprise 15/up to 12 shadow Package useradd.c Request access control

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in SuSE Linux Enterprise 15/up to 12. Affected by this vulnerability is an unknown functionality of the file useradd.c of the component shadow Package. The manipulation as part of Request leads to access control. This vulnerability is uniquely identified as CVE-2018-16588. Local access is required to approach this attack. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in SuSE Linux Enterprise 15/up to 12 (Operating System). It has been rated as problematic. This issue affects some unknown processing of the file useradd.c of the component shadow Package. The manipulation as part of a Request leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Privilege escalation can occur in the SUSE useradd.c code in useradd, as distributed in the SUSE shadow package through 4.2.1-27.9.1 for SUSE Linux Enterprise 12 (SLE-12) and through 4.5-5.39 for SUSE Linux Enterprise 15 (SLE-15). Non-existing intermediate directories are created with mode 0777 during user creation. Given that they are world-writable, local attackers might use this for privilege escalation and other unspecified attacks. NOTE: this would affect non-SUSE users who took useradd.c code from a 2014-04-02 upstream pull request; however, no non-SUSE distribution is known to be affected.

The bug was discovered 09/25/2018. The weakness was disclosed 09/26/2018 (Website). It is possible to read the advisory at lists.opensuse.org. The identification of this vulnerability is CVE-2018-16588 since 09/06/2018. Attacking locally is a requirement. Required for exploitation is a simple authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 117797 (openSUSE Security Update : shadow (openSUSE-2018-1055)), 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 171614 (OpenSUSE Security Update for shadow (openSUSE-SU-2018:2885-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 hours after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (117797). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
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: 117797
Nessus Name: openSUSE Security Update : shadow (openSUSE-2018-1055)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

09/06/2018 🔍
09/25/2018 +19 days 🔍
09/26/2018 +0 days 🔍
09/26/2018 +0 days 🔍
09/26/2018 +0 days 🔍
09/27/2018 +1 days 🔍
09/27/2018 +0 days 🔍
03/27/2020 +547 days 🔍

Sourcesinfo

Vendor: suse.com

Advisory: lists.opensuse.org
Status: Not defined

CVE: CVE-2018-16588 (🔍)
GCVE (CVE): GCVE-0-2018-16588
GCVE (VulDB): GCVE-100-124487

Entryinfo

Created: 09/27/2018 09:03
Updated: 03/27/2020 09:42
Changes: 09/27/2018 09:03 (71), 03/27/2020 09:42 (3)
Complete: 🔍
Cache ID: 216::103

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