CVE-2020-35508: Race Condition
First published: Mon Nov 30 2020(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-305.rt7.72.el8 | 0:4.18.0-305.rt7.72.el8 |
| redhat/kernel | <0:4.18.0-305.el8 | 0:4.18.0-305.el8 |
| redhat/kernel-rt | <0:4.18.0-193.60.2.rt13.112.el8_2 | 0:4.18.0-193.60.2.rt13.112.el8_2 |
| redhat/kernel | <0:4.18.0-193.60.2.el8_2 | 0:4.18.0-193.60.2.el8_2 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 | |
| Linux Kernel | <5.12 | |
| Linux Kernel | =5.12 | |
| Linux Kernel | =5.12-rc1 | |
| Linux Kernel | =5.12-rc2 | |
| Linux Kernel | =5.12-rc3 | |
| Linux Kernel | =5.12-rc4 | |
| Red Hat Enterprise Linux | =8.0 | |
| All of | ||
| NetApp AFF A700s Firmware | ||
| netapp a700s | ||
| Brocade Fabric OS | ||
| All of | ||
| NetApp FAS8300 Firmware | ||
| NetApp FAS8300 Firmware | ||
| All of | ||
| NetApp FAS 8700 | ||
| NetApp FAS8700 | ||
| All of | ||
| NetApp AFF A400 | ||
| NetApp AFF A400 | ||
| All of | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| All of | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| All of | ||
| netapp h700s firmware | ||
| netapp h700s | ||
| All of | ||
| netapp h300e firmware | ||
| netapp h300e | ||
| All of | ||
| netapp h500e firmware | ||
| netapp h500e | ||
| All of | ||
| netapp h700e firmware | ||
| netapp h700e | ||
| All of | ||
| netapp h410s firmware | ||
| netapp h410s | ||
| All of | ||
| netapp h410c firmware | ||
| netapp h410c | ||
| All of | ||
| netapp h610c firmware | ||
| netapp h610c | ||
| All of | ||
| netapp h610s firmware | ||
| netapp h610s | ||
| All of | ||
| netapp h615c firmware | ||
| netapp h615c | ||
| NetApp AFF A700s Firmware | ||
| netapp a700s | ||
| NetApp FAS8300 Firmware | ||
| NetApp FAS8300 Firmware | ||
| NetApp FAS 8700 | ||
| NetApp FAS8700 | ||
| NetApp AFF A400 | ||
| NetApp AFF A400 | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| netapp h700s firmware | ||
| netapp h700s | ||
| netapp h300e firmware | ||
| netapp h300e | ||
| netapp h500e firmware | ||
| netapp h500e | ||
| netapp h700e firmware | ||
| netapp h700e | ||
| netapp h410s firmware | ||
| netapp h410s | ||
| netapp h410c firmware | ||
| netapp h410c | ||
| netapp h610c firmware | ||
| netapp h610c | ||
| netapp h610s firmware | ||
| netapp h610s | ||
| netapp h615c firmware | ||
| netapp h615c |
Remedy
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-35508 https://nvd.nist.gov/vuln/detail/CVE-2020-35508
- https://bugzilla.redhat.com/show_bug.cgi?id=1902724
- https://access.redhat.com/errata/RHSA-2021:1739
- https://access.redhat.com/errata/RHSA-2021:1578
- https://access.redhat.com/errata/RHSA-2021:2719
- https://access.redhat.com/errata/RHSA-2021:2718
- https://access.redhat.com/security/cve/cve-2020-35508
- https://github.com/torvalds/linux/commit/b4e00444cab4c3f3fec876dc0cccc8cbb0d1a948
- https://security.netapp.com/advisory/ntap-20210513-0006/
- https://launchpad.net/bugs/cve/CVE-2020-35508
- https://lore.kernel.org/kernel-hardening/20200324215049.GA3710@pi3.com.pl/
- https://mailman-eng.corp.redhat.com/archives/rhkernel-list/2020-December/498644.html
- https://security-tracker.debian.org/tracker/CVE-2020-35508
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-35508
- https://nvd.nist.gov/vuln/detail/CVE-2020-35508
- https://ubuntu.com/security/CVE-2020-35508
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2020-35508?
CVE-2020-35508 has a medium severity level due to the potential for local attacks to bypass checks for sending signals to privileged processes.
How do I fix CVE-2020-35508?
To fix CVE-2020-35508, update the affected packages to the specified patched versions provided by your distribution.
What systems are affected by CVE-2020-35508?
CVE-2020-35508 affects various versions of the Linux kernel, specifically Red Hat kernel-rt and Debian Linux packages among others.
What exploit capabilities does CVE-2020-35508 provide to attackers?
CVE-2020-35508 allows local attackers to exploit race conditions to send signals to privileged processes, potentially leading to unauthorized actions.
Is CVE-2020-35508 specific to any Linux distributions?
While CVE-2020-35508 impacts the Linux kernel, it is particularly relevant to Red Hat and Debian distributions due to the affected versions listed.
- collector/redhat-cve
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-35508
- agent/weakness
- agent/severity
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/remedy
- agent/last-modified-date
- agent/trending
- agent/source
- agent/tags
- agent/author
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- agent/softwarecombine
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-index
- package-manager/redhat
- package-manager/debian
- vendor/linux
- canonical/linux kernel
- version/linux kernel/5.12
- version/linux kernel/5.12-rc1
- version/linux kernel/5.12-rc2
- version/linux kernel/5.12-rc3
- version/linux kernel/5.12-rc4
- vendor/redhat
- canonical/red hat enterprise linux
- version/red hat enterprise linux/8.0
- vendor/netapp
- canonical/netapp aff a700s firmware
- canonical/netapp a700s
- canonical/brocade fabric os
- canonical/netapp fas8300 firmware
- canonical/netapp fas 8700
- canonical/netapp fas8700
- canonical/netapp aff a400
- canonical/netapp h300s firmware
- canonical/netapp h300s
- canonical/netapp h500s firmware
- canonical/netapp h500s
- canonical/netapp h700s firmware
- canonical/netapp h700s
- canonical/netapp h300e firmware
- canonical/netapp h300e
- canonical/netapp h500e firmware
- canonical/netapp h500e
- canonical/netapp h700e firmware
- canonical/netapp h700e
- canonical/netapp h410s firmware
- canonical/netapp h410s
- canonical/netapp h410c firmware
- canonical/netapp h410c
- canonical/netapp h610c firmware
- canonical/netapp h610c
- canonical/netapp h610s firmware
- canonical/netapp h610s
- canonical/netapp h615c firmware
- canonical/netapp h615c