CVE-2020-29661: Use After Free
First published: Fri Dec 04 2020(Updated: )
A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <0:2.6.32-754.39.1.el6 | 0:2.6.32-754.39.1.el6 |
| redhat/kernel-rt | <0:3.10.0-1160.21.1.rt56.1158.el7 | 0:3.10.0-1160.21.1.rt56.1158.el7 |
| redhat/kernel-alt | <0:4.14.0-115.35.1.el7a | 0:4.14.0-115.35.1.el7a |
| redhat/kernel | <0:3.10.0-1160.21.1.el7 | 0:3.10.0-1160.21.1.el7 |
| redhat/kernel | <0:3.10.0-693.87.1.el7 | 0:3.10.0-693.87.1.el7 |
| redhat/kernel | <0:3.10.0-957.70.1.el7 | 0:3.10.0-957.70.1.el7 |
| redhat/kernel | <0:3.10.0-1062.46.1.el7 | 0:3.10.0-1062.46.1.el7 |
| redhat/kernel-rt | <0:4.18.0-240.15.1.rt7.69.el8_3 | 0:4.18.0-240.15.1.rt7.69.el8_3 |
| redhat/kernel | <0:4.18.0-240.15.1.el8_3 | 0:4.18.0-240.15.1.el8_3 |
| redhat/kernel | <0:4.18.0-147.43.1.el8_1 | 0:4.18.0-147.43.1.el8_1 |
| redhat/kernel-rt | <0:4.18.0-193.46.1.rt13.96.el8_2 | 0:4.18.0-193.46.1.rt13.96.el8_2 |
| redhat/kernel | <0:4.18.0-193.46.1.el8_2 | 0:4.18.0-193.46.1.el8_2 |
| Google Android | ||
| ubuntu/linux-aws-5.8 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-5.8 | <5.10~ | 5.10~ |
| ubuntu/linux-gcp-5.8 | <5.10~ | 5.10~ |
| ubuntu/linux-oracle-5.8 | <5.10~ | 5.10~ |
| ubuntu/linux-riscv-5.8 | <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-hwe-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-riscv-5.11 | <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-gcp-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-oem-5.14 | <5.10~ | 5.10~ |
| ubuntu/linux-intel-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux | <4.15.0-136.140 | 4.15.0-136.140 |
| ubuntu/linux | <5.4.0-66.74 | 5.4.0-66.74 |
| ubuntu/linux | <3.13.0-188.239 | 3.13.0-188.239 |
| ubuntu/linux | <4.4.0-203.235 | 4.4.0-203.235 |
| ubuntu/linux | <5.8.0-44.50 | 5.8.0-44.50 |
| ubuntu/linux | <5.10~ | 5.10~ |
| ubuntu/linux-hwe-5.4 | <5.4.0-66.74~18.04.2 | 5.4.0-66.74~18.04.2 |
| ubuntu/linux-hwe-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-kvm | <5.10~ | 5.10~ |
| ubuntu/linux-kvm | <5.8.0-1019.21 | 5.8.0-1019.21 |
| ubuntu/linux-kvm | <5.4.0-1033.34 | 5.4.0-1033.34 |
| ubuntu/linux-kvm | <4.4.0-1088.97 | 4.4.0-1088.97 |
| ubuntu/linux-kvm | <4.15.0-1085.87 | 4.15.0-1085.87 |
| ubuntu/linux-lts-trusty | <5.10~ | 5.10~ |
| ubuntu/linux-aws | <4.15.0-1094.101 | 4.15.0-1094.101 |
| ubuntu/linux-aws | <5.4.0-1038.40 | 5.4.0-1038.40 |
| ubuntu/linux-aws | <5.8.0-1024.26 | 5.8.0-1024.26 |
| ubuntu/linux-aws | <4.4.0-1086.90 | 4.4.0-1086.90 |
| ubuntu/linux-aws | <5.10~ | 5.10~ |
| ubuntu/linux-aws | <4.4.0-1122.136 | 4.4.0-1122.136 |
| ubuntu/linux-aws-5.0 | <5.10~ | 5.10~ |
| ubuntu/linux-aws-5.4 | <5.4.0-1038.40~18.04.1 | 5.4.0-1038.40~18.04.1 |
| ubuntu/linux-aws-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-aws-hwe | <5.10~ | 5.10~ |
| ubuntu/linux-aws-hwe | <4.15.0-1094.101~16.04.1 | 4.15.0-1094.101~16.04.1 |
| ubuntu/linux-azure | <5.4.0-1040.42 | 5.4.0-1040.42 |
| ubuntu/linux-azure | <4.15.0-1108.120~16.04.1 | 4.15.0-1108.120~16.04.1 |
| ubuntu/linux-azure | <5.8.0-1023.25 | 5.8.0-1023.25 |
| ubuntu/linux-azure | <4.15.0-1108.120~14.04.1 | 4.15.0-1108.120~14.04.1 |
| ubuntu/linux-azure | <5.10~ | 5.10~ |
| ubuntu/linux-azure-4.15 | <4.15.0-1108.120 | 4.15.0-1108.120 |
| ubuntu/linux-azure-4.15 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-5.3 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-5.4 | <5.4.0-1040.42~18.04.1 | 5.4.0-1040.42~18.04.1 |
| ubuntu/linux-gcp | <4.15.0-1093.106~16.04.1 | 4.15.0-1093.106~16.04.1 |
| ubuntu/linux-gcp | <5.4.0-1037.40 | 5.4.0-1037.40 |
| 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 | <4.15.0-1093.106 | 4.15.0-1093.106 |
| ubuntu/linux-gcp-4.15 | <5.10~ | 5.10~ |
| ubuntu/linux-gcp-5.3 | <5.10~ | 5.10~ |
| ubuntu/linux-gcp-5.4 | <5.4.0-1037.40~18.04.1 | 5.4.0-1037.40~18.04.1 |
| ubuntu/linux-gcp-edge | <5.10~ | 5.10~ |
| ubuntu/linux-gke-4.15 | <4.15.0-1079.84 | 4.15.0-1079.84 |
| 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-oracle-5.0 | <5.10~ | 5.10~ |
| ubuntu/linux-oem | <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-raspi | <5.8.0-1016.19 | 5.8.0-1016.19 |
| ubuntu/linux-raspi | <5.4.0-1029.32 | 5.4.0-1029.32 |
| ubuntu/linux-raspi | <5.10~ | 5.10~ |
| ubuntu/linux-raspi2 | <4.15.0-1079.84 | 4.15.0-1079.84 |
| ubuntu/linux-raspi2 | <4.4.0-1146.156 | 4.4.0-1146.156 |
| ubuntu/linux-raspi2 | <5.10~ | 5.10~ |
| ubuntu/linux-raspi-5.4 | <5.4.0-1029.32~18.04.1 | 5.4.0-1029.32~18.04.1 |
| ubuntu/linux-raspi-5.4 | <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-snapdragon | <4.15.0-1096.105 | 4.15.0-1096.105 |
| ubuntu/linux-snapdragon | <4.4.0-1150.160 | 4.4.0-1150.160 |
| ubuntu/linux-snapdragon | <5.10~ | 5.10~ |
| ubuntu/linux-aws-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-oracle-5.11 | <5.10~ | 5.10~ |
| ubuntu/linux-aws-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-hwe-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-fips | <5.10~ | 5.10~ |
| ubuntu/linux-oracle-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-fde | <5.10~ | 5.10~ |
| ubuntu/linux-azure-fde | <5.4.0-1040.42 | 5.4.0-1040.42 |
| ubuntu/linux-gke-5.4 | <5.4.0-1036.38~18.04.1 | 5.4.0-1036.38~18.04.1 |
| ubuntu/linux-gke-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-gkeop-5.4 | <5.4.0-1010.11~18.04.1 | 5.4.0-1010.11~18.04.1 |
| ubuntu/linux-gkeop-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-gcp-5.13 | <5.10~ | 5.10~ |
| ubuntu/linux-ibm-5.4 | <5.10~ | 5.10~ |
| ubuntu/linux-oracle | <4.15.0-1065.73 | 4.15.0-1065.73 |
| ubuntu/linux-oracle | <5.4.0-1038.41 | 5.4.0-1038.41 |
| ubuntu/linux-oracle | <5.8.0-1021.22 | 5.8.0-1021.22 |
| ubuntu/linux-oracle | <4.15.0-1065.73~16.04.1 | 4.15.0-1065.73~16.04.1 |
| ubuntu/linux-oracle | <5.10~ | 5.10~ |
| ubuntu/linux-oracle-5.4 | <5.4.0-1038.41~18.04.1 | 5.4.0-1038.41~18.04.1 |
| ubuntu/linux-dell300x | <5.10~ | 5.10~ |
| ubuntu/linux-dell300x | <4.15.0-1012.16 | 4.15.0-1012.16 |
| ubuntu/linux-gkeop | <5.10~ | 5.10~ |
| ubuntu/linux-gkeop | <5.4.0-1010.11 | 5.4.0-1010.11 |
| ubuntu/linux-oem-5.10 | <5.10~ | 5.10~ |
| ubuntu/linux-gke | <5.10~ | 5.10~ |
| ubuntu/linux-gke | <5.4.0-1036.38 | 5.4.0-1036.38 |
| ubuntu/linux-lowlatency | <5.10~ | 5.10~ |
| ubuntu/linux-oem-5.17 | <5.10~ | 5.10~ |
| ubuntu/linux-aws-5.3 | <5.10~ | 5.10~ |
| ubuntu/linux-azure-edge | <5.10~ | 5.10~ |
| ubuntu/linux-hwe | <5.10~ | 5.10~ |
| ubuntu/linux-hwe | <4.15.0-136.140~16.04.1 | 4.15.0-136.140~16.04.1 |
| ubuntu/linux-hwe-edge | <5.10~ | 5.10~ |
| ubuntu/linux-ibm | <5.10~ | 5.10~ |
| ubuntu/linux-lts-xenial | <4.4.0-203.235~14.04.1 | 4.4.0-203.235~14.04.1 |
| ubuntu/linux-lts-xenial | <5.10~ | 5.10~ |
| ubuntu/linux-raspi2-5.3 | <5.10~ | 5.10~ |
| Linux Linux kernel | >=2.6.26<4.4.248 | |
| Linux Linux kernel | >=4.5<4.9.248 | |
| Linux Linux kernel | >=4.10<4.14.212 | |
| Linux Linux kernel | >=4.15<4.19.163 | |
| Linux Linux kernel | >=4.20<5.4.83 | |
| Linux Linux kernel | >=5.5<5.9.14 | |
| Fedoraproject Fedora | =32 | |
| Fedoraproject Fedora | =33 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Netapp Active Iq Unified Manager Vmware Vsphere | ||
| Broadcom Fabric Operating System | ||
| Netapp Solidfire Baseboard Management Controller Firmware | ||
| Netapp Solidfire Baseboard Management Controller | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| Netapp A700s Firmware | ||
| Netapp A700s | ||
| Netapp 8300 Firmware | ||
| Netapp 8300 | ||
| Netapp 8700 Firmware | ||
| Netapp 8700 | ||
| Netapp A400 Firmware | ||
| Netapp A400 | ||
| Oracle Tekelec Platform Distribution | >=7.4.0<=7.7.1 | |
| All of | ||
| Netapp Solidfire Baseboard Management Controller Firmware | ||
| Netapp Solidfire Baseboard Management Controller | ||
| All of | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| All of | ||
| Netapp A700s Firmware | ||
| Netapp A700s | ||
| All of | ||
| Netapp 8300 Firmware | ||
| Netapp 8300 | ||
| All of | ||
| Netapp 8700 Firmware | ||
| Netapp 8700 | ||
| All of | ||
| Netapp A400 Firmware | ||
| Netapp A400 | ||
| 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 6.8.9-1 |
Remedy
Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-29661 https://nvd.nist.gov/vuln/detail/CVE-2020-29661
- https://bugzilla.redhat.com/show_bug.cgi?id=1906525
- https://access.redhat.com/errata/RHSA-2021:1288
- https://access.redhat.com/errata/RHSA-2021:0857
- https://access.redhat.com/errata/RHSA-2021:0354
- https://access.redhat.com/errata/RHSA-2021:0856
- https://access.redhat.com/errata/RHSA-2021:0862
- https://access.redhat.com/errata/RHSA-2021:2164
- https://access.redhat.com/errata/RHSA-2021:0878
- https://access.redhat.com/errata/RHSA-2021:0940
- https://access.redhat.com/errata/RHSA-2021:1028
- https://access.redhat.com/errata/RHSA-2021:1031
- https://access.redhat.com/errata/RHSA-2021:0537
- https://access.redhat.com/errata/RHSA-2021:0558
- https://access.redhat.com/errata/RHSA-2021:0686
- https://access.redhat.com/errata/RHSA-2021:0689
- https://access.redhat.com/errata/RHSA-2021:0774
- https://access.redhat.com/errata/RHSA-2021:0763
- https://access.redhat.com/errata/RHSA-2021:0765
- https://access.redhat.com/security/cve/cve-2020-29661
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=54ffccbf053b5b6ca4f6e45094b942fab92a25fc
- http://www.openwall.com/lists/oss-security/2020/12/10/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MZ7OAKAEFAXQRGBZK4LYUWINCD3D2XCL/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BOB25SU6XUL4TNP7KB63WNZSYTIYFDPP/
- http://packetstormsecurity.com/files/160681/Linux-TIOCSPGRP-Broken-Locking.html
- https://security.netapp.com/advisory/ntap-20210122-0001/
- https://www.debian.org/security/2021/dsa-4843
- https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- http://packetstormsecurity.com/files/164950/Kernel-Live-Patch-Security-Notice-LSN-0082-1.html
- https://launchpad.net/bugs/cve/CVE-2020-29661
- https://android.googlesource.com/kernel/common/+/54ffccbf053b5b6ca4f6e45094b942fab92a25fc
- https://source.android.com/docs/security/bulletin/2021-05-01 (Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BOB25SU6XUL4TNP7KB63WNZSYTIYFDPP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MZ7OAKAEFAXQRGBZK4LYUWINCD3D2XCL/
- https://git.kernel.org/linus/54ffccbf053b5b6ca4f6e45094b942fab92a25fc
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2125
- https://googleprojectzero.blogspot.com/2021/10/how-simple-linux-kernel-memory.html
- https://security-tracker.debian.org/tracker/CVE-2020-29661
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1906526
- https://ubuntu.com/security/notices/USN-4748-1
- https://ubuntu.com/security/notices/USN-4749-1
- https://ubuntu.com/security/notices/USN-4750-1
- https://ubuntu.com/security/notices/USN-4751-1
- https://ubuntu.com/security/notices/USN-4752-1
- https://ubuntu.com/security/notices/USN-5130-1
- https://www.cve.org/CVERecord?id=CVE-2020-29661
- https://nvd.nist.gov/vuln/detail/CVE-2020-29661
- https://git.kernel.org/linus/47f86834bbd4193139d61d659bebf9ab9d691e37
- https://ubuntu.com/security/CVE-2020-29661
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/android-source
- agent/software-canonical-lookup-request
- agent/remedy
- agent/severity
- agent/description
- agent/weakness
- agent/event
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-29661
- agent/last-modified-date
- collector/usn-cve
- source/Ubuntu
- agent/software-canonical-lookup
- agent/references
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- collector/nvd-cve
- source/NVD
- package-manager/redhat
- vendor/google
- canonical/google android
- package-manager/ubuntu
- package-manager/debian
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/2.6.26
- version/linux linux kernel/4.5
- version/linux linux kernel/4.10
- version/linux linux kernel/4.15
- version/linux linux kernel/4.20
- version/linux linux kernel/5.5
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/32
- version/fedoraproject fedora/33
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- vendor/netapp
- canonical/netapp active iq unified manager vmware vsphere
- vendor/broadcom
- canonical/broadcom fabric operating system
- canonical/netapp solidfire baseboard management controller firmware
- canonical/netapp solidfire baseboard management controller
- canonical/netapp h410c firmware
- canonical/netapp h410c
- canonical/netapp a700s firmware
- canonical/netapp a700s
- canonical/netapp 8300 firmware
- canonical/netapp 8300
- canonical/netapp 8700 firmware
- canonical/netapp 8700
- canonical/netapp a400 firmware
- canonical/netapp a400
- vendor/oracle
- canonical/oracle tekelec platform distribution
- version/oracle tekelec platform distribution/7.4.0
- version/oracle tekelec platform distribution/7.7.1