Linux Kernel up to 4.10 Sample-Rate Calculator kernel/events/core.c perf_cpu_time_max_percent_handler integer overflow

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.10. It has been classified as critical. This affects the function perf_cpu_time_max_percent_handler of the file kernel/events/core.c of the component Sample-Rate Calculator. Performing a manipulation results in integer overflow. This vulnerability is identified as CVE-2017-18255. The attack is only possible with local access. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 4.10 (Operating System). This affects the function perf_cpu_time_max_percent_handler of the file kernel/events/core.c of the component Sample-Rate Calculator. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The perf_cpu_time_max_percent_handler function in kernel/events/core.c in the Linux kernel before 4.11 allows local users to cause a denial of service (integer overflow) or possibly have unspecified other impact via a large value, as demonstrated by an incorrect sample-rate calculation.

The bug was discovered 03/31/2018. The weakness was released 03/31/2018 (Website). It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2017-18255 since 03/31/2018. Attacking locally is a requirement. The requirement for exploitation is a authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 110136 (EulerOS 2.0 SP1 : kernel (EulerOS-SA-2018-1132)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351331 (Amazon Linux Security Advisory for kernel: ALAC2012-2018-007 (SegmentSmack/FragmentSmack)).

Upgrading to version 4.11 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (110136) and SecurityFocus (BID 103774†). Entries connected to this vulnerability are available at VDB-111327, VDB-112151, VDB-112694 and VDB-114489. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

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

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 110136
Nessus Name: EulerOS 2.0 SP1 : kernel (EulerOS-SA-2018-1132)
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 4.11
Patch: git.kernel.org

Timelineinfo

03/31/2018 🔍
03/31/2018 +0 days 🔍
03/31/2018 +0 days 🔍
03/31/2018 +0 days 🔍
04/01/2018 +1 days 🔍
04/13/2018 +12 days 🔍
05/14/2018 +31 days 🔍
05/29/2018 +15 days 🔍
02/26/2023 +1734 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 1572e45a924f254d9570093abde46430c3172e3d
Status: Confirmed

CVE: CVE-2017-18255 (🔍)
GCVE (CVE): GCVE-0-2017-18255
GCVE (VulDB): GCVE-100-115491
SecurityFocus: 103774 - Linux Kernel CVE-2018-10087 Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 04/01/2018 18:33
Updated: 02/26/2023 08:45
Changes: 04/01/2018 18:33 (79), 01/20/2020 06:34 (4), 02/26/2023 08:43 (5), 02/26/2023 08:45 (1)
Complete: 🔍
Cache ID: 216::103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!