systemd Notify Socket manager_dispatch_notify_fd input validation

CVSS Meta Temp Score
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5.4$0-$5k0.00

A vulnerability, which was classified as problematic, was found in systemd (the affected version is unknown). Affected is the function manager_dispatch_notify_fd of the component Notify Socket. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

The manager_dispatch_notify_fd function in systemd allows local users to cause a denial of service (system hang) via a zero-length message received over a notify socket, which causes an error to be returned and the notification handler to be disabled.

The weakness was disclosed 10/13/2016 by Andrew (Website). The advisory is shared for download at lists.opensuse.org. This vulnerability is traded as CVE-2016-7796 since 09/09/2016. The exploitability is told to be easy. The attack needs to be approached locally. A authentication is needed for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 94060 (openSUSE Security Update : systemd (openSUSE-2016-1184)), 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 276181 (Fedora Security Update for systemd (FEDORA-2016-c942ed0424)).

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

The vulnerability is also documented in the vulnerability database at Tenable (94060). The entry 92711 is pretty similar.

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
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VulDB Reliability: 🔍

NVD Base Score: 5.5
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CVSSv2info

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Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Nessus ID: 94060
Nessus Name: openSUSE Security Update : systemd (openSUSE-2016-1184)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for systemd FEDORA-2016-c942ed0424
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

09/09/2016 🔍
09/30/2016 +21 days 🔍
10/13/2016 +13 days 🔍
10/13/2016 +0 days 🔍
10/13/2016 +0 days 🔍
10/14/2016 +1 days 🔍
10/14/2016 +0 days 🔍
09/26/2022 +2173 days 🔍

Sourcesinfo

Advisory: 4234
Researcher: Andrew
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-7796 (🔍)
SecurityTracker: 1037320
SecurityFocus: 93250 - systemd CVE-2016-7796 Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 10/14/2016 11:26
Updated: 09/26/2022 09:17
Changes: 10/14/2016 11:26 (62), 05/09/2019 09:30 (14), 09/26/2022 09:13 (5), 09/26/2022 09:17 (1)
Complete: 🔍

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