Linux Kernel up to 5.7 prctl expected behavior violation

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.
4.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 5.7. This affects the function prctl. Executing a manipulation can lead to expected behavior violation. This vulnerability is registered as CVE-2020-10768. The attack needs to be launched locally. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 5.7 (Operating System). This vulnerability affects the function prctl. The manipulation with an unknown input leads to a expected behavior violation vulnerability. The CWE definition for the vulnerability is CWE-440. A feature, API, or function does not perform according to its specification. As an impact it is known to affect confidentiality. CVE summarizes:

A flaw was found in the Linux Kernel before 5.8-rc1 in the prctl() function, where it can be used to enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being 'force disabled' when it is not and opens the system to Spectre v2 attacks. The highest threat from this vulnerability is to confidentiality.

The weakness was published 09/16/2020 as not defined bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability was named CVE-2020-10768 since 03/20/2020. Local access is required to approach this attack. A single authentication is necessary for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 5.8-rc1 eliminates this vulnerability.

Similar entries are available at VDB-161294 and VDB-161293. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

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

Exploitinginfo

Class: Expected behavior violation
CWE: CWE-440 / CWE-436
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.8-rc1

Timelineinfo

03/20/2020 🔍
09/16/2020 +180 days 🔍
09/16/2020 +0 days 🔍
09/16/2020 +0 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2020-10768 (🔍)
GCVE (CVE): GCVE-0-2020-10768
GCVE (VulDB): GCVE-100-161290
See also: 🔍

Entryinfo

Created: 09/16/2020 09:51
Updated: 09/16/2020 09:56
Changes: 09/16/2020 09:51 (42), 09/16/2020 09:56 (12)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!