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 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 |
| ubuntu/linux | <4.15.0-129.132 | 4.15.0-129.132 |
| ubuntu/linux | <5.4.0-59.65 | 5.4.0-59.65 |
| ubuntu/linux | <5.8.0-44.50 | 5.8.0-44.50 |
| ubuntu/linux | <5.10~ | 5.10~ |
| ubuntu/linux | <4.4.0-198.230 | 4.4.0-198.230 |
| ubuntu/linux-aws | <4.15.0-1091.96 | 4.15.0-1091.96 |
| ubuntu/linux-aws | <5.4.0-1034.35 | 5.4.0-1034.35 |
| ubuntu/linux-aws | <5.8.0-1024.26 | 5.8.0-1024.26 |
| ubuntu/linux-aws | <4.4.0-1083.87 | 4.4.0-1083.87 |
| ubuntu/linux-aws | <5.10~ | 5.10~ |
| ubuntu/linux-aws | <4.4.0-1119.133 | 4.4.0-1119.133 |
| ubuntu/linux-aws-5.0 | <5.10~ | 5.10~ |
| ubuntu/linux-aws-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-aws-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-aws-5.3 | <5.10~ | 5.10~ |
| ubuntu/linux-aws-5.4 | <5.4.0-1034.35~18.04.1 | 5.4.0-1034.35~18.04.1 |
| ubuntu/linux-aws-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-aws-5.8 | <5.10~ | 5.10~ |
| ubuntu/linux-aws-hwe | <5.10~ | 5.10~ |
| ubuntu/linux-aws-hwe | <4.15.0-1091.96~16.04.1 | 4.15.0-1091.96~16.04.1 |
| ubuntu/linux-azure | <5.4.0-1035.36 | 5.4.0-1035.36 |
| ubuntu/linux-azure | <5.8.0-1023.25 | 5.8.0-1023.25 |
| ubuntu/linux-azure | <4.15.0-1103.114~14.04.1 | 4.15.0-1103.114~14.04.1 |
| ubuntu/linux-azure | <5.10~ | 5.10~ |
| ubuntu/linux-azure | <4.15.0-1103.114~16.04.1 | 4.15.0-1103.114~16.04.1 |
| ubuntu/linux-azure-4.15 | <4.15.0-1103.114 | 4.15.0-1103.114 |
| ubuntu/linux-azure-4.15 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-5.3 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-5.4 | <5.4.0-1035.36~18.04.1 | 5.4.0-1035.36~18.04.1 |
| ubuntu/linux-azure-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-edge | <5.10~ | 5.10~ |
| ubuntu/linux-azure-fde | <5.4.0-1035.36 | 5.4.0-1035.36 |
| ubuntu/linux-azure-fde | <5.10~ | 5.10~ |
| ubuntu/linux-bluefield | <5.4.0-1011.14 | 5.4.0-1011.14 |
| ubuntu/linux-bluefield | <5.10~ | 5.10~ |
| ubuntu/linux-dell300x | <4.15.0-1010.14 | 4.15.0-1010.14 |
| ubuntu/linux-dell300x | <5.10~ | 5.10~ |
| ubuntu/linux-fips | <5.10~ | 5.10~ |
| ubuntu/linux-gcp | <5.4.0-1033.35 | 5.4.0-1033.35 |
| ubuntu/linux-gcp | <5.8.0-1023.24 | 5.8.0-1023.24 |
| ubuntu/linux-gcp | <5.10~ | 5.10~ |
| ubuntu/linux-gcp | <4.15.0-1091.104~16.04.1 | 4.15.0-1091.104~16.04.1 |
| ubuntu/linux-gcp-4.15 | <4.15.0-1091.104 | 4.15.0-1091.104 |
| ubuntu/linux-gcp-4.15 | <5.10~ | 5.10~ |
| ubuntu/linux-gcp-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-gcp-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-gcp-5.3 | <5.10~ | 5.10~ |
| ubuntu/linux-gcp-5.4 | <5.4.0-1033.35~18.04.1 | 5.4.0-1033.35~18.04.1 |
| ubuntu/linux-gcp-5.8 | <5.10~ | 5.10~ |
| ubuntu/linux-gcp-edge | <5.10~ | 5.10~ |
| ubuntu/linux-gke | <5.10~ | 5.10~ |
| ubuntu/linux-gke-4.15 | <4.15.0-1077.82 | 4.15.0-1077.82 |
| ubuntu/linux-gke-4.15 | <5.10~ | 5.10~ |
| ubuntu/linux-gke-5.0 | <5.10~ | 5.10~ |
| ubuntu/linux-gke-5.3 | <5.10~ | 5.10~ |
| ubuntu/linux-gke-5.4 | <5.4.0-1033.35~18.04.1 | 5.4.0-1033.35~18.04.1 |
| ubuntu/linux-gke-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-gkeop | <5.10~ | 5.10~ |
| ubuntu/linux-gkeop-5.4 | <5.4.0-1008.9~18.04.1 | 5.4.0-1008.9~18.04.1 |
| ubuntu/linux-gkeop-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-hwe | <5.10~ | 5.10~ |
| ubuntu/linux-hwe | <4.15.0-129.132~16.04.1 | 4.15.0-129.132~16.04.1 |
| ubuntu/linux-hwe-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-hwe-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-hwe-5.4 | <5.4.0-59.65~18.04.1 | 5.4.0-59.65~18.04.1 |
| ubuntu/linux-hwe-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-hwe-5.8 | <5.8.0-44.50~20.04.1 | 5.8.0-44.50~20.04.1 |
| ubuntu/linux-hwe-5.8 | <5.10~ | 5.10~ |
| ubuntu/linux-hwe-edge | <5.10~ | 5.10~ |
| ubuntu/linux-ibm | <5.10~ | 5.10~ |
| ubuntu/linux-ibm-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-intel-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-kvm | <4.15.0-1082.84 | 4.15.0-1082.84 |
| ubuntu/linux-kvm | <5.4.0-1031.32 | 5.4.0-1031.32 |
| ubuntu/linux-kvm | <5.8.0-1019.21 | 5.8.0-1019.21 |
| ubuntu/linux-kvm | <5.10~ | 5.10~ |
| ubuntu/linux-kvm | <4.4.0-1085.94 | 4.4.0-1085.94 |
| ubuntu/linux-lowlatency | <5.10~ | 5.10~ |
| ubuntu/linux-lts-trusty | <5.10~ | 5.10~ |
| ubuntu/linux-lts-xenial | <4.4.0-198.230~14.04.1 | 4.4.0-198.230~14.04.1 |
| ubuntu/linux-lts-xenial | <5.10~ | 5.10~ |
| ubuntu/linux-oem | <5.10~ | 5.10~ |
| ubuntu/linux-oem-5.10 | <5.10~ | 5.10~ |
| ubuntu/linux-oem-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-oem-5.17 | <5.10~ | 5.10~ |
| ubuntu/linux-oem-5.6 | <5.6.0-1048.52 | 5.6.0-1048.52 |
| ubuntu/linux-oem-5.6 | <5.10~ | 5.10~ |
| ubuntu/linux-oem-osp1 | <5.10~ | 5.10~ |
| ubuntu/linux-oracle | <4.15.0-1062.68 | 4.15.0-1062.68 |
| ubuntu/linux-oracle | <5.4.0-1034.36 | 5.4.0-1034.36 |
| ubuntu/linux-oracle | <5.8.0-1021.22 | 5.8.0-1021.22 |
| ubuntu/linux-oracle | <5.10~ | 5.10~ |
| ubuntu/linux-oracle | <4.15.0-1062.68~16.04.1 | 4.15.0-1062.68~16.04.1 |
| ubuntu/linux-oracle-5.0 | <5.10~ | 5.10~ |
| ubuntu/linux-oracle-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-oracle-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-oracle-5.3 | <5.10~ | 5.10~ |
| ubuntu/linux-oracle-5.4 | <5.4.0-1034.36~18.04.1 | 5.4.0-1034.36~18.04.1 |
| ubuntu/linux-raspi | <5.4.0-1026.29 | 5.4.0-1026.29 |
| ubuntu/linux-raspi | <5.8.0-1016.19 | 5.8.0-1016.19 |
| ubuntu/linux-raspi | <5.10~ | 5.10~ |
| ubuntu/linux-raspi-5.4 | <5.4.0-1026.29~18.04.1 | 5.4.0-1026.29~18.04.1 |
| ubuntu/linux-raspi-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-raspi2 | <4.15.0-1077.82 | 4.15.0-1077.82 |
| ubuntu/linux-raspi2 | <5.10~ | 5.10~ |
| ubuntu/linux-raspi2 | <4.4.0-1143.153 | 4.4.0-1143.153 |
| ubuntu/linux-raspi2-5.3 | <5.10~ | 5.10~ |
| ubuntu/linux-riscv | <5.8.0-17.19 | 5.8.0-17.19 |
| ubuntu/linux-riscv | <5.10~ | 5.10~ |
| ubuntu/linux-riscv-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-riscv-5.8 | <5.8.0-17.19~20.04.1 | 5.8.0-17.19~20.04.1 |
| ubuntu/linux-riscv-5.8 | <5.10~ | 5.10~ |
| ubuntu/linux-snapdragon | <4.15.0-1094.103 | 4.15.0-1094.103 |
| ubuntu/linux-snapdragon | <5.10~ | 5.10~ |
| ubuntu/linux-snapdragon | <4.4.0-1147.157 | 4.4.0-1147.157 |
| Linux Linux kernel | <5.12 | |
| Linux Linux kernel | =5.12 | |
| Linux Linux kernel | =5.12-rc1 | |
| Linux Linux kernel | =5.12-rc2 | |
| Linux Linux kernel | =5.12-rc3 | |
| Linux Linux kernel | =5.12-rc4 | |
| Redhat Enterprise Linux | =8.0 | |
| Netapp A700s Firmware | ||
| Netapp A700s | ||
| Netapp Brocade Fabric Operating System Firmware | ||
| Netapp Fas8300 Firmware | ||
| Netapp Fas8300 | ||
| Netapp Fas8700 Firmware | ||
| Netapp Fas8700 | ||
| Netapp Aff A400 Firmware | ||
| 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 | ||
| All of | ||
| Netapp A700s Firmware | ||
| Netapp A700s | ||
| All of | ||
| Netapp Fas8300 Firmware | ||
| Netapp Fas8300 | ||
| All of | ||
| Netapp Fas8700 Firmware | ||
| Netapp Fas8700 | ||
| All of | ||
| Netapp Aff A400 Firmware | ||
| 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 | ||
| debian/linux | 4.19.249-2 4.19.304-1 5.10.209-2 5.10.216-1 6.1.76-1 6.1.90-1 6.7.12-1 |
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.
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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://ubuntu.com/security/notices/USN-4751-1
- https://ubuntu.com/security/notices/USN-4752-1
- https://www.cve.org/CVERecord?id=CVE-2020-35508
- https://nvd.nist.gov/vuln/detail/CVE-2020-35508
- https://git.kernel.org/linus/5f8aadd8b9966d71a77bba52b9d499cc2f38269f
- https://git.kernel.org/linus/b4e00444cab4c3f3fec876dc0cccc8cbb0d1a948
- https://ubuntu.com/security/CVE-2020-35508
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- agent/type
- agent/last-modified-date
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-35508
- agent/author
- agent/weakness
- agent/severity
- agent/remedy
- agent/description
- collector/usn-cve
- source/Ubuntu
- agent/software-canonical-lookup
- agent/references
- agent/tags
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- collector/nvd-cve
- source/NVD
- package-manager/redhat
- package-manager/ubuntu
- package-manager/debian
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.12
- version/linux linux kernel/5.12-rc1
- version/linux linux kernel/5.12-rc2
- version/linux linux kernel/5.12-rc3
- version/linux linux kernel/5.12-rc4
- vendor/redhat
- canonical/redhat enterprise linux
- version/redhat enterprise linux/8.0
- vendor/netapp
- canonical/netapp a700s firmware
- canonical/netapp a700s
- canonical/netapp brocade fabric operating system firmware
- canonical/netapp fas8300 firmware
- canonical/netapp fas8300
- canonical/netapp fas8700 firmware
- canonical/netapp fas8700
- canonical/netapp aff a400 firmware
- 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