Linux Kernel up to 4.14.8 kernel/bpf/verifier.c check_stack_boundary Variable memory corruption

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

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 4.14.8. This vulnerability affects the function check_stack_boundary of the file kernel/bpf/verifier.c. The manipulation as part of Variable leads to memory corruption. This vulnerability is traded as CVE-2017-17857. An attack has to be approached locally. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.14.8 (Operating System). It has been rated as critical. This issue affects the function check_stack_boundary of the file kernel/bpf/verifier.c. The manipulation as part of a Variable leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The check_stack_boundary function in kernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging mishandling of invalid variable stack read operations.

The bug was discovered 12/18/2017. The weakness was shared 12/27/2017 (Website). It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2017-17857 since 12/22/2017. Attacking locally is a requirement. A simple authentication is needed for exploitation. 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 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). The entries VDB-111054, VDB-111055, VDB-111056 and VDB-111057 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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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: Memory corruption
CWE: CWE-119
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-2017-17857 (🔍)
GCVE (CVE): GCVE-0-2017-17857
GCVE (VulDB): GCVE-100-111059
See also: 🔍

Entryinfo

Created: 12/28/2017 09:34
Updated: 01/19/2023 09:18
Changes: 12/28/2017 09:34 (77), 12/18/2019 09:01 (3), 01/19/2023 09:16 (5), 01/19/2023 09:18 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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