AccountsService up to 0.6.49 user.c user_change_icon_file_authorized_cb path traversal

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in AccountsService up to 0.6.49. This affects the function user_change_icon_file_authorized_cb of the file user.c. The manipulation with the input ../ leads to path traversal. This vulnerability is traded as CVE-2018-14036. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in AccountsService up to 0.6.49. It has been rated as critical. This issue affects the function user_change_icon_file_authorized_cb of the file user.c. The manipulation with the input value ../ leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, and integrity. The summary by CVE is:

Directory Traversal with ../ sequences occurs in AccountsService before 0.6.50 because of an insufficient path check in user_change_icon_file_authorized_cb() in user.c.

The bug was discovered 07/02/2018. The weakness was shared 07/13/2018 (Website). The advisory is shared at openwall.com. The identification of this vulnerability is CVE-2018-14036 since 07/13/2018. The exploitation is known to be easy. The attack may be initiated remotely. The successful exploitation needs a simple authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 118877 (openSUSE Security Update : accountsservice (openSUSE-2018-1380)), 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 171892 (OpenSUSE Security Update for accountsservice (openSUSE-SU-2018:3710-1)).

Upgrading to version 0.6.50 eliminates this vulnerability. A possible mitigation has been published 5 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (118877) and SecurityFocus (BID 104757†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 118877
Nessus Name: openSUSE Security Update : accountsservice (openSUSE-2018-1380)
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: 🔍

Upgrade: AccountsService 0.6.50
Patch: cgit.freedesktop.org

Timelineinfo

07/02/2018 🔍
07/13/2018 +10 days 🔍
07/13/2018 +0 days 🔍
07/13/2018 +0 days 🔍
07/13/2018 +0 days 🔍
07/13/2018 +0 days 🔍
11/09/2018 +119 days 🔍
11/10/2018 +1 days 🔍
04/09/2023 +1611 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Not defined

CVE: CVE-2018-14036 (🔍)
GCVE (CVE): GCVE-0-2018-14036
GCVE (VulDB): GCVE-100-121409
SecurityFocus: 104757 - AccountsService CVE-2018-14036 Directory Traversal Vulnerability

Entryinfo

Created: 07/14/2018 01:04
Updated: 04/09/2023 08:31
Changes: 07/14/2018 01:04 (75), 03/04/2020 17:11 (4), 04/09/2023 08:31 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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