Linux Kernel up to 4.14.x/4.15.x/4.16.x/4.17.x/4.18.12 BPF Verifier kernel/bpf/verifier.c adjust_scalar_min_max_vals out-of-bounds

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

A vulnerability classified as critical was found in Linux Kernel up to 4.14.x/4.15.x/4.16.x/4.17.x/4.18.12 (Operating System). This vulnerability affects the function adjust_scalar_min_max_vals of the file kernel/bpf/verifier.c of the component BPF Verifier. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 10/03/2018. The weakness was published 10/17/2018 (Website). The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2018-18445 since 10/17/2018. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 14 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 119302 (Ubuntu 18.10 : linux-aws vulnerabilities (USN-3832-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171731 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2018:3934-1)).

Upgrading to version 4.18.13 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (119302). Similar entries are available at 114359, 124773, 125976 and 126010.

Productinfo

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Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

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: Out-of-bounds
CWE: CWE-125 / CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 119302
Nessus Name: Ubuntu 18.10 : linux-aws vulnerabilities (USN-3832-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Kernel 4.18.13
Patch: git.kernel.org

Timelineinfo

10/03/2018 🔍
10/17/2018 +13 days 🔍
10/17/2018 +0 days 🔍
10/17/2018 +0 days 🔍
10/18/2018 +1 days 🔍
11/30/2018 +43 days 🔍
11/30/2018 +0 days 🔍
05/30/2023 +1642 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3832-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-18445 (🔍)
SecurityFocus: 105525

See also: 🔍

Entryinfo

Created: 10/18/2018 07:04 AM
Updated: 05/30/2023 09:43 AM
Changes: 10/18/2018 07:04 AM (78), 04/05/2020 10:58 AM (3), 05/30/2023 09:42 AM (5), 05/30/2023 09:43 AM (1)
Complete: 🔍

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