Linux Kernel up to 4.13.7 KEYS Subsystem add_key null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.13.7. It has been declared as problematic. The impacted element is the function add_key of the component KEYS Subsystem. The manipulation results in null pointer dereference. This vulnerability is reported as CVE-2017-15299. The attack requires a local approach. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.13.7 (Operating System). It has been classified as problematic. Affected is the function add_key of the component KEYS Subsystem. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

The KEYS subsystem in the Linux kernel through 4.13.7 mishandles use of add_key for a key that already exists but is uninstantiated, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted system call.

The bug was discovered 10/03/2017. The weakness was disclosed 10/14/2017 (Website). The advisory is available at bugzilla.redhat.com. This vulnerability is traded as CVE-2017-15299 since 10/14/2017. Local access is required to approach this attack. Required for exploitation is a authentication. Technical details are known, but there is no available exploit.

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 104158 (Fedora 26 : kernel (2017-c110ac0eb1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197283 (Ubuntu Security Notification for Linux Vulnerabilities (USN-3798-1)).

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

The vulnerability is also documented in the databases at Tenable (104158) and SecurityFocus (BID 101264†). The entries VDB-80800, VDB-93468, VDB-106281 and VDB-107859 are pretty similar. 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: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 104158
Nessus Name: Fedora 26 : kernel (2017-c110ac0eb1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for kernel FEDORA-2017-cafcdbdde5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

10/03/2017 🔍
10/09/2017 +5 days 🔍
10/14/2017 +5 days 🔍
10/14/2017 +0 days 🔍
10/14/2017 +0 days 🔍
10/15/2017 +1 days 🔍
10/25/2017 +10 days 🔍
10/26/2017 +1 days 🔍
01/03/2023 +1895 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2017-c110ac0eb1
Researcher: Michael Ellerman, Gustavo Romero, Breno Leitao, Paul Mackerras, Cyril Bur.
Status: Confirmed

CVE: CVE-2017-15299 (🔍)
GCVE (CVE): GCVE-0-2017-15299
GCVE (VulDB): GCVE-100-107862
SecurityFocus: 101264

See also: 🔍

Entryinfo

Created: 10/15/2017 12:02
Updated: 01/03/2023 15:06
Changes: 10/15/2017 12:02 (75), 11/24/2019 17:08 (3), 01/17/2021 07:37 (4), 01/03/2023 15:01 (3), 01/03/2023 15:06 (1)
Complete: 🔍
Cache ID: 216:548:103

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