CVE-2020-35508

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

A flaw possibility of race condition and incorrect initialization of the process id was found in the Linux kernel child/parent process identification handling while filtering signal handlers. A local attacker is able to abuse this flaw to bypass checks to send any signal to a privileged process.

References

https://github.com/torvalds/linux/commit/b4e00444cab4c3f3fec876dc0cccc8cbb0d1a948

https://bugzilla.redhat.com/show_bug.cgi?id=1902724

https://security.netapp.com/advisory/ntap-20210513-0006/

Details

Source: MITRE

Published: 2021-03-26

Updated: 2021-05-13

Type: CWE-665

Risk Information

CVSS v2

Base Score: 4.4

Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 4.5

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Impact Score: 3.4

Exploitability Score: 1

Severity: MEDIUM

Tenable Plugins

View all (10 total)

IDNameProductFamilySeverity
151857RHEL 8 : kernel (RHSA-2021:2718)NessusRed Hat Local Security Checks
high
151856RHEL 8 : kernel-rt (RHSA-2021:2719)NessusRed Hat Local Security Checks
high
150463OracleVM 3.4 : Unbreakable / etc (OVMSA-2021-0016)NessusOracleVM Local Security Checks
high
149914Oracle Linux 8 : kernel (ELSA-2021-1578)NessusOracle Linux Local Security Checks
high
149874CentOS 8 : kernel (CESA-2021:1578)NessusCentOS Local Security Checks
high
149670RHEL 8 : kernel (RHSA-2021:1578)NessusRed Hat Local Security Checks
high
149660RHEL 8 : kernel-rt (RHSA-2021:1739)NessusRed Hat Local Security Checks
high
149296Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9215)NessusOracle Linux Local Security Checks
high
147982Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-4752-1)NessusUbuntu Local Security Checks
high
147978Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4751-1)NessusUbuntu Local Security Checks
high