Linux Kernel 3.14.1/3.14.2/3.14.3/3.14.4/3.14.5 audit_filter_syscall information disclosure

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5.0$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Linux Kernel 3.14.1/3.14.2/3.14.3/3.14.4/3.14.5. Affected by this vulnerability is the function audit_filter_syscall. The manipulation results in information disclosure. This vulnerability was named CVE-2014-3917. In addition, an exploit is available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Linux Kernel 3.14.1/3.14.2/3.14.3/3.14.4/3.14.5 (Operating System). It has been classified as problematic. Affected is the function audit_filter_syscall. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on availability.

The weakness was presented 05/28/2014 by Andy Lutomirski as not defined mailinglist post (oss-sec) via Linux kernel DoS with syscall auditing. The advisory is available at seclists.org. This vulnerability is traded as CVE-2014-3917 since 05/29/2014. Local access is required to approach this attack. The successful exploitation requires a authentication. Technical details and a private exploit are known. This vulnerability is assigned to T1592 by the MITRE ATT&CK project. The advisory points out:

Issuing a system call with a random large number will OOPS, depending on configuration. A configuration that will enable this bug is: # auditctl -a exit,always -S open

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 74339 (Fedora 20 : kernel-3.14.5-200.fc20 (2014-7033)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 122632 (Red Hat Update for Kernel (RHSA-2014:1167)). The advisory illustrates:

It's possible that this can be extended to more than just a DoS -- with some care and willingness to exploit timing attacks, this is a read of arbitrary single bits in kernel memory.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at article.gmane.org. It is possible to mitigate the problem by applying the configuration setting CONFIG_AUDITSYSCALL=n. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (93437), Tenable (74339), SecurityFocus (BID 67699†), OSVDB (107531†) and Secunia (SA60011†). See VDB-67523, VDB-67524 and VDB-65956 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.5
VulDB Temp Score: 5.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74339
Nessus Name: Fedora 20 : kernel-3.14.5-200.fc20 (2014-7033)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 800909
OpenVAS Name: Fedora Update for kernel FEDORA-2015-5024
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: article.gmane.org
Config: CONFIG_AUDITSYSCALL=n

Timelineinfo

05/28/2014 🔍
05/28/2014 +0 days 🔍
05/28/2014 +0 days 🔍
05/29/2014 +1 days 🔍
05/30/2014 +1 days 🔍
06/05/2014 +6 days 🔍
06/06/2014 +1 days 🔍
06/09/2014 +3 days 🔍
06/20/2021 +2568 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: seclists.org
Researcher: Andy Lutomirski
Status: Not defined
Confirmation: 🔍

CVE: CVE-2014-3917 (🔍)
GCVE (CVE): GCVE-0-2014-3917
GCVE (VulDB): GCVE-100-13398

OVAL: 🔍

X-Force: 93437 - Linux Kernel audit_filter_syscall() denial of service, Medium Risk
SecurityFocus: 67699
Secunia: 60011
OSVDB: 107531
Vulnerability Center: 44846 - Linux Kernel Through 3.14.5 Local DoS and Information Disclosure via a Large Value of a Syscall Number, Low

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 05/30/2014 12:34
Updated: 06/20/2021 14:11
Changes: 05/30/2014 12:34 (75), 05/30/2017 10:59 (10), 06/20/2021 14:04 (3), 06/20/2021 14:11 (1)
Complete: 🔍
Cache ID: 216:6CE:103

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