Linux Kernel up to 4.14.8 Pointer Arithmetic kernel/bpf/verifier.c integer overflow

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

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 4.14.8. Affected by this vulnerability is an unknown functionality of the file kernel/bpf/verifier.c of the component Pointer Arithmetic. Such manipulation leads to integer overflow. This vulnerability is documented as CVE-2017-17854. The attack needs to be performed locally. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.14.8 (Operating System) and classified as critical. Affected by this issue is an unknown functionality of the file kernel/bpf/verifier.c of the component Pointer Arithmetic. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

kernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local users to cause a denial of service (integer overflow and memory corruption) or possibly have unspecified other impact by leveraging unrestricted integer values for pointer arithmetic.

The bug was discovered 12/18/2017. The weakness was released 12/27/2017 (Website). The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2017-17854 since 12/22/2017. The attack needs to be approached locally. The successful exploitation needs a simple authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 105596 (Fedora 26 : kernel (2018-8ed5eff2c0)), 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 277085 (Fedora Security Update for kernel (FEDORA-2018-22d5fa8a90) (Meltdown)).

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 vulnerability database at Tenable (105596). Entries connected to this vulnerability are available at VDB-111054, VDB-111055, VDB-111057 and VDB-111058. 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: 6.5
VulDB Meta Temp Score: 6.4

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
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: 105596
Nessus Name: Fedora 26 : kernel (2018-8ed5eff2c0)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 835155
OpenVAS Name: Fedora Update for kernel FEDORA-2018-22d5fa8a90
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

12/18/2017 🔍
12/22/2017 +4 days 🔍
12/27/2017 +5 days 🔍
12/27/2017 +0 days 🔍
12/28/2017 +1 days 🔍
01/04/2018 +7 days 🔍
01/05/2018 +1 days 🔍
01/19/2023 +1840 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2018-8ed5eff2c0
Status: Not defined

CVE: CVE-2017-17854 (🔍)
GCVE (CVE): GCVE-0-2017-17854
GCVE (VulDB): GCVE-100-111056
See also: 🔍

Entryinfo

Created: 12/28/2017 09:31
Updated: 01/19/2023 09:00
Changes: 12/28/2017 09:31 (76), 12/18/2019 08:51 (3), 01/19/2023 08:56 (5), 01/19/2023 09:00 (1)
Complete: 🔍
Cache ID: 216::103

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