Linux Kernel up to 4.14.8 kernel/bpf/verifier.c 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 was found in Linux Kernel up to 4.14.8. It has been rated as critical. Affected is an unknown function of the file kernel/bpf/verifier.c. This manipulation causes memory corruption. This vulnerability is registered as CVE-2017-17853. The attack needs to be launched locally. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 4.14.8 (Operating System) and classified as critical. Affected by this vulnerability is an unknown function of the file kernel/bpf/verifier.c. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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 incorrect BPF_RSH signed bounds calculations.

The bug was discovered 12/18/2017. The weakness was published 12/27/2017 (Website). It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2017-17853 since 12/22/2017. Attacking locally is a requirement. The successful exploitation requires a single 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 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). Similar entries are available at VDB-111054, VDB-111056, VDB-111057 and VDB-111058. Be aware that VulDB is the high quality source for vulnerability data.

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: 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-2017-17853 (🔍)
GCVE (CVE): GCVE-0-2017-17853
GCVE (VulDB): GCVE-100-111055
See also: 🔍

Entryinfo

Created: 12/28/2017 09:31
Updated: 01/19/2023 08:52
Changes: 12/28/2017 09:31 (75), 12/18/2019 08:50 (3), 01/19/2023 08:47 (5), 01/19/2023 08:52 (1)
Complete: 🔍
Cache ID: 216::103

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