Linux Kernel 4.9.x Extended BPF Verifier kernel/bpf/verifier.c integer overflow

CVSS Meta Temp Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 4.9.x. It has been classified as critical. This affects an unknown part of the file kernel/bpf/verifier.c of the component Extended BPF Verifier. This manipulation causes integer overflow. This vulnerability is registered as CVE-2017-17863. The attack needs to be launched locally. No exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel 4.9.x (Operating System). Affected by this vulnerability is an unknown code block of the file kernel/bpf/verifier.c of the component Extended BPF Verifier. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 12/22/2017. The weakness was published 12/18/2017 by Jann Horn as confirmed patch (Mailing List). The advisory is shared at anonscm.debian.org. This vulnerability is known as CVE-2017-17863 since 12/23/2017. An attack has to be approached locally. The requirement for exploitation is a single authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 105433 (Debian DSA-4073-1 : linux - security update), 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 197013 (Ubuntu Security Notification for Linux Vulnerabilities (USN-3523-1) (Meltdown)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at anonscm.debian.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (105433), SecurityFocus (BID 102321†) and SecurityTracker (ID 1040058†). Similar entries are available at VDB-110931, VDB-110932, VDB-110933 and VDB-111024. Several companies clearly confirm that VulDB is the primary source for best 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: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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VulDB Reliability: 🔍

NVD Base Score: 7.8
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CVSSv2info

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Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Nessus ID: 105433
Nessus Name: Debian DSA-4073-1 : linux - security update
Nessus File: 🔍
Nessus Risk: 🔍
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Nessus Context: 🔍

OpenVAS ID: 103137
OpenVAS Name: Panda Global Protection System Crash DoS Vulnerability
OpenVAS File: 🔍
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Qualys ID: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: anonscm.debian.org

Timelineinfo

12/18/2017 🔍
12/18/2017 +0 days 🔍
12/22/2017 +4 days 🔍
12/23/2017 +1 days 🔍
12/23/2017 +0 days 🔍
12/26/2017 +3 days 🔍
12/26/2017 +0 days 🔍
12/27/2017 +1 days 🔍
12/27/2017 +0 days 🔍
01/19/2023 +1849 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: usn-3523-2
Researcher: Jann Horn
Status: Confirmed

CVE: CVE-2017-17863 (🔍)
GCVE (CVE): GCVE-0-2017-17863
GCVE (VulDB): GCVE-100-111025

OVAL: 🔍

SecurityFocus: 102321 - Linux Kernel CVE-2017-17863 Local Denial of Service Vulnerability
SecurityTracker: 1040058

See also: 🔍

Entryinfo

Created: 12/27/2017 09:04
Updated: 01/19/2023 07:40
Changes: 12/27/2017 09:04 (83), 12/17/2019 19:43 (4), 01/28/2021 08:09 (2), 01/19/2023 07:33 (3), 01/19/2023 07:40 (1)
Complete: 🔍
Cache ID: 216:98E:103

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