Linux Kernel up to 4.11 net/ipv4/tcp.c __tcp_disconnect divide by zero

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

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.11. It has been classified as critical. Affected is the function __tcp_disconnect of the file net/ipv4/tcp.c. Performing a manipulation results in divide by zero. This vulnerability was named CVE-2017-14106. The attack needs to be approached locally. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 4.11 (Operating System). This affects the function __tcp_disconnect of the file net/ipv4/tcp.c. The manipulation with an unknown input leads to a divide by zero vulnerability. CWE is classifying the issue as CWE-369. The product divides a value by zero. This is going to have an impact on availability. The summary by CVE is:

The tcp_disconnect function in net/ipv4/tcp.c in the Linux kernel before 4.12 allows local users to cause a denial of service (__tcp_select_window divide-by-zero error and system crash) by triggering a disconnect within a certain tcp_recvmsg code path.

The bug was discovered 05/18/2017. The weakness was presented 09/01/2017 by Andrey Konovalov as confirmed git commit (GIT Repository). It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2017-14106 since 09/01/2017. Attacking locally is a requirement. The requirement for exploitation is a authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 106 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 103363 (Debian DLA-1099-1 : linux security update (BlueBorne) (Stack Clash)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196934 (Ubuntu Security Notification for Linux, Linux-raspi2 Vulnerabilities (USN-3443-1)).

Upgrading to version 4.12 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (103363) and SecurityFocus (BID 100878†). See VDB-105605, VDB-106127, VDB-106121 and VDB-106733 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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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
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Divide by zero
CWE: CWE-369 / 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: 103363
Nessus Name: Debian DLA-1099-1 : linux security update (BlueBorne) (Stack Clash)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53754
OpenVAS Name: Debian Security Advisory DSA 3981-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: Kernel 4.12
Patch: git.kernel.org

Timelineinfo

05/18/2017 🔍
09/01/2017 +106 days 🔍
09/01/2017 +0 days 🔍
09/01/2017 +0 days 🔍
09/01/2017 +0 days 🔍
09/02/2017 +1 days 🔍
09/20/2017 +18 days 🔍
09/21/2017 +1 days 🔍
12/27/2022 +1923 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2017:2918
Researcher: Andrey Konovalov
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-14106 (🔍)
GCVE (CVE): GCVE-0-2017-14106
GCVE (VulDB): GCVE-100-106083

OVAL: 🔍

SecurityFocus: 100878 - Linux kernel CVE-2017-14106 Local Denial of Service Vulnerability
SecurityTracker: 1039549

See also: 🔍

Entryinfo

Created: 09/02/2017 09:41
Updated: 12/27/2022 15:52
Changes: 09/02/2017 09:41 (77), 11/12/2019 17:41 (12), 01/10/2021 15:38 (2), 12/27/2022 15:52 (3)
Complete: 🔍
Cache ID: 216::103

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