Ubuntu Developers systemd Configuration File SetX11Keyboard access control

CVSS Meta Temp Score
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CTI Interest Score
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6.9$5k-$25k0.00

Summaryinfo

A vulnerability has been found in Ubuntu Developers systemd and classified as problematic. Affected is the function SetX11Keyboard of the component Configuration File. This manipulation causes access control. This vulnerability appears as CVE-2013-4394. There is no available exploit.

Detailsinfo

A vulnerability was found in Ubuntu Developers systemd (the affected version unknown). It has been declared as critical. Affected by this vulnerability is the function SetX11Keyboard of the component Configuration File. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The SetX11Keyboard function in systemd, when PolicyKit Local Authority (PKLA) is used to change the group permissions on the X Keyboard Extension (XKB) layouts description, allows local users in the group to modify the Xorg X11 Server configuration file and possibly gain privileges via vectors involving "special and control characters."

The weakness was presented 10/28/2013 by Florian Weimer as Bug 862324 as not defined bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2013-4394 since 06/12/2013. The exploitation appears to be difficult. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 01/09/2022). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 70402 (Debian DSA-2777-1 : systemd - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks.

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 X-Force (87698), Tenable (70402), SecurityFocus (BID 62744†) and Vulnerability Center (SBV-45140†). See VDB-65380 for similar entry. 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: 6.9
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.9
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: 70402
Nessus Name: Debian DSA-2777-1 : systemd - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 892777
OpenVAS Name: Debian Security Advisory DSA 2777-1 (systemd - several vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/12/2013 🔍
10/01/2013 +111 days 🔍
10/01/2013 +0 days 🔍
10/28/2013 +27 days 🔍
10/28/2013 +0 days 🔍
06/26/2014 +241 days 🔍
03/24/2015 +271 days 🔍
01/09/2022 +2483 days 🔍

Sourcesinfo

Advisory: Bug 862324
Researcher: Florian Weimer
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-4394 (🔍)
GCVE (CVE): GCVE-0-2013-4394
GCVE (VulDB): GCVE-100-65383

OVAL: 🔍

X-Force: 87698
SecurityFocus: 62744 - systemd X Keyboard Extension Processing Local Privilege Escalation Vulnerability
Vulnerability Center: 45140 - systemd Local Security Bypass in SetX11Keyboard, Medium

See also: 🔍

Entryinfo

Created: 03/24/2015 15:54
Updated: 01/09/2022 03:47
Changes: 03/24/2015 15:54 (65), 05/31/2017 09:11 (6), 01/09/2022 03:47 (3)
Complete: 🔍
Cache ID: 216:6B7:103

Be aware that VulDB is the high quality source for vulnerability data.

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