CWE
863 843
Advisory Published
CVE Published
CVE Published
Updated

CVE-2023-4194: Kernel: tap: tap_open(): correctly initialize socket uid next fix of i_uid to current_fsuid

First published: Sun Aug 06 2023(Updated: )

A flaw found in the Linux Kernel. The tun/tap sockets have their socket UID hardcoded to 0 due to a type confusion in their initialization function. While it will be often correct, as tuntap devices require CAP_NET_ADMIN, it may not always be the case, e.g., a non-root user only having that capability. This would make tun/tap sockets being incorrectly treated in filtering/routing decisions, possibly bypassing network filters. The original fix for the <a href="https://access.redhat.com/security/cve/CVE-2023-1076">CVE-2023-1076</a> was incorrect. The problem is that the following upstream commits (that were fix for the <a href="https://access.redhat.com/security/cve/CVE-2023-1076">CVE-2023-1076</a>) - a096ccca6e50 ("tun: tun_chr_open(): correctly initialize socket uid"), - 66b2c338adce ("tap: tap_open(): correctly initialize socket uid"), pass "inode-&gt;i_uid" to sock_init_data_uid() as the last parameter and that turns out to be entirely bogus. References: <a href="https://lore.kernel.org/all/20230731164237.48365-1-lersek@redhat.com/">https://lore.kernel.org/all/20230731164237.48365-1-lersek@redhat.com/</a> <a href="https://lore.kernel.org/all/20230731164237.48365-2-lersek@redhat.com/">https://lore.kernel.org/all/20230731164237.48365-2-lersek@redhat.com/</a> <a href="https://lore.kernel.org/all/20230731164237.48365-3-lersek@redhat.com/">https://lore.kernel.org/all/20230731164237.48365-3-lersek@redhat.com/</a>

Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<=6.4
Linux Linux kernel=6.5-rc1
Linux Linux kernel=6.5-rc2
Linux Linux kernel=6.5-rc3
Linux Linux kernel=6.5-rc4
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux=9.0
Fedoraproject Fedora=37
Fedoraproject Fedora=38
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Debian Debian Linux=12.0
redhat/kernel<6.5
6.5
ubuntu/linux<5.4.0-164.181
5.4.0-164.181
ubuntu/linux<5.15.0-86.96
5.15.0-86.96
ubuntu/linux<6.2.0-34.34
6.2.0-34.34
ubuntu/linux<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-allwinner<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-allwinner-5.19<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-aws<5.4.0-1111.120
5.4.0-1111.120
ubuntu/linux-aws<5.15.0-1047.52
5.15.0-1047.52
ubuntu/linux-aws<6.2.0-1013.13
6.2.0-1013.13
ubuntu/linux-aws<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-aws-5.0<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-aws-5.15<5.15.0-1047.52~20.04.1
5.15.0-1047.52~20.04.1
ubuntu/linux-aws-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-aws-5.19<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-aws-5.4<5.4.0-1111.120~18.04.1
5.4.0-1111.120~18.04.1
ubuntu/linux-aws-5.4<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-aws-6.2<6.2.0-1013.13~22.04.1
6.2.0-1013.13~22.04.1
ubuntu/linux-aws-6.2<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-aws-6.5<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-aws-fips<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-aws-hwe<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure<5.4.0-1117.124
5.4.0-1117.124
ubuntu/linux-azure<5.15.0-1049.56
5.15.0-1049.56
ubuntu/linux-azure<6.2.0-1014.14
6.2.0-1014.14
ubuntu/linux-azure<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-4.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-5.15<5.15.0-1049.56~20.04.1
5.15.0-1049.56~20.04.1
ubuntu/linux-azure-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-5.4<5.4.0-1117.124~18.04.1
5.4.0-1117.124~18.04.1
ubuntu/linux-azure-5.4<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-6.2<6.2.0-1014.14~22.04.1
6.2.0-1014.14~22.04.1
ubuntu/linux-azure-6.2<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-6.5<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-edge<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-fde<5.15.0-1049.56.1
5.15.0-1049.56.1
ubuntu/linux-azure-fde<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-fde-5.15<5.15.0-1049.56~20.04.1.1
5.15.0-1049.56~20.04.1.1
ubuntu/linux-azure-fde-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-fde-5.19<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-fde-6.2<6.2.0-1014.14~22.04.1.1
6.2.0-1014.14~22.04.1.1
ubuntu/linux-azure-fde-6.2<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-azure-fips<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-bluefield<5.4.0-1072.78
5.4.0-1072.78
ubuntu/linux-bluefield<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-dell300x<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-fips<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gcp<5.4.0-1115.124
5.4.0-1115.124
ubuntu/linux-gcp<5.15.0-1044.52
5.15.0-1044.52
ubuntu/linux-gcp<6.2.0-1016.18
6.2.0-1016.18
ubuntu/linux-gcp<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gcp-4.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gcp-5.15<5.15.0-1044.52~20.04.1
5.15.0-1044.52~20.04.1
ubuntu/linux-gcp-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gcp-5.19<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gcp-5.4<5.4.0-1115.124~18.04.1
5.4.0-1115.124~18.04.1
ubuntu/linux-gcp-5.4<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gcp-6.2<6.2.0-1016.18~22.04.1
6.2.0-1016.18~22.04.1
ubuntu/linux-gcp-6.5<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gcp-fips<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gke<5.15.0-1044.49
5.15.0-1044.49
ubuntu/linux-gke<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gke-4.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gke-5.0<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gke-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gke-5.4<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gkeop<5.4.0-1078.82
5.4.0-1078.82
ubuntu/linux-gkeop<5.15.0-1030.35
5.15.0-1030.35
ubuntu/linux-gkeop<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gkeop-5.15<5.15.0-1030.35~20.04.1
5.15.0-1030.35~20.04.1
ubuntu/linux-gkeop-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-gkeop-5.4<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-hwe<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-hwe-5.15<5.15.0-86.96~20.04.1
5.15.0-86.96~20.04.1
ubuntu/linux-hwe-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-hwe-5.4<5.4.0-164.181~18.04.1
5.4.0-164.181~18.04.1
ubuntu/linux-hwe-5.4<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-hwe-6.2<6.2.0-34.34~22.04.1
6.2.0-34.34~22.04.1
ubuntu/linux-hwe-6.2<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-hwe-6.5<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-hwe-edge<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-ibm<5.4.0-1058.63
5.4.0-1058.63
ubuntu/linux-ibm<5.15.0-1040.43
5.15.0-1040.43
ubuntu/linux-ibm<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-ibm-5.15<5.15.0-1040.43~20.04.1
5.15.0-1040.43~20.04.1
ubuntu/linux-ibm-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-ibm-5.4<5.4.0-1058.63~18.04.1
5.4.0-1058.63~18.04.1
ubuntu/linux-ibm-5.4<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-intel<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-intel-5.13<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-intel-iotg<5.15.0-1043.49
5.15.0-1043.49
ubuntu/linux-intel-iotg<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-intel-iotg-5.15<5.15.0-1043.49~20.04.1
5.15.0-1043.49~20.04.1
ubuntu/linux-intel-iotg-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-iot<5.4.0-1023.24
5.4.0-1023.24
ubuntu/linux-iot<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-kvm<5.4.0-1100.106
5.4.0-1100.106
ubuntu/linux-kvm<5.15.0-1044.49
5.15.0-1044.49
ubuntu/linux-kvm<6.2.0-1014.14
6.2.0-1014.14
ubuntu/linux-kvm<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-laptop<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-lowlatency<5.15.0-86.95
5.15.0-86.95
ubuntu/linux-lowlatency<6.2.0-1014.14
6.2.0-1014.14
ubuntu/linux-lowlatency<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-86.95~20.04.1
5.15.0-86.95~20.04.1
ubuntu/linux-lowlatency-hwe-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-lowlatency-hwe-5.19<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-lowlatency-hwe-6.2<6.2.0-1014.14~22.04.1
6.2.0-1014.14~22.04.1
ubuntu/linux-lowlatency-hwe-6.2<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-lowlatency-hwe-6.5<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-lts-xenial<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-nvidia<5.15.0-1037.37
5.15.0-1037.37
ubuntu/linux-nvidia<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-nvidia-6.2<6.2.0-1011.11
6.2.0-1011.11
ubuntu/linux-nvidia-6.5<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oem<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oem-5.10<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oem-5.14<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oem-5.17<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oem-5.6<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oem-6.0<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oem-6.1<6.1.0-1021.21
6.1.0-1021.21
ubuntu/linux-oem-6.1<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oem-6.5<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oem-6.8<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oem-osp1<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oracle<5.4.0-1110.119
5.4.0-1110.119
ubuntu/linux-oracle<5.15.0-1045.51
5.15.0-1045.51
ubuntu/linux-oracle<6.2.0-1013.13
6.2.0-1013.13
ubuntu/linux-oracle<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oracle-5.0<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oracle-5.13<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oracle-5.15<5.15.0-1045.51~20.04.1
5.15.0-1045.51~20.04.1
ubuntu/linux-oracle-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oracle-5.4<5.4.0-1110.119~18.04.1
5.4.0-1110.119~18.04.1
ubuntu/linux-oracle-5.4<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-oracle-6.5<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-raspi<5.4.0-1095.106
5.4.0-1095.106
ubuntu/linux-raspi<5.15.0-1040.43
5.15.0-1040.43
ubuntu/linux-raspi<6.2.0-1014.16
6.2.0-1014.16
ubuntu/linux-raspi<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-raspi-5.4<5.4.0-1095.106~18.04.1
5.4.0-1095.106~18.04.1
ubuntu/linux-raspi-5.4<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-raspi2<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-riscv<6.2.0-34.34.1
6.2.0-34.34.1
ubuntu/linux-riscv<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-riscv-5.15<5.15.0-1043.47~20.04.1
5.15.0-1043.47~20.04.1
ubuntu/linux-riscv-5.15<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-riscv-6.5<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-snapdragon<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-starfive<6.2.0-1006.7
6.2.0-1006.7
ubuntu/linux-starfive<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-starfive-5.19<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-starfive-6.5<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
ubuntu/linux-xilinx-zynqmp<5.4.0-1031.35
5.4.0-1031.35
ubuntu/linux-xilinx-zynqmp<5.15.0-1025.29
5.15.0-1025.29
ubuntu/linux-xilinx-zynqmp<6.5~<5.4.253<5.15.126
6.5~
5.4.253
5.15.126
debian/linux
5.10.218-1
5.10.221-1
6.1.94-1
6.1.99-1
6.9.8-1
6.9.9-1

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