Vulnerability · Published Aug 7, 2023 · Assigned by redhat
CVE-2023-4194Kernel: tap: tap_open(): correctly initialize socket uid next fix of i_uid to current_fsuid
Medium 5.5
In plain English
A medium-severity type confusion in Red Hat Enterprise Linux 6 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.3%top 81.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to bypass network filters and gain unauthorized access to some resources. The original patches fixing CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits - a096ccca6e50 ("tun: tun_chr_open(): correctly initialize socket uid"), - 66b2c338adce ("tap: tap_open(): correctly initialize socket uid"), pass "inode->i_uid" to sock_init_data_uid() as the last parameter and that turns out to not be accurate.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 6.1.52-1 | DSA-5492-1 |
| Debian:12 | linux | 6.1.52-1 | DEBIAN-CVE-2023-4194 |
| Debian:13 | linux | 6.4.11-1 | DEBIAN-CVE-2023-4194 |
| Debian:14 | linux | 6.4.11-1 | DEBIAN-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux | 5.15.0-86.96 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux | 5.15.0-86.96 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1047.52 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1047.52 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | 6.2.0-1013.13~22.04.1 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | 6.2.0-1013.13~22.04.1 | USN-6412-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1049.56 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1049.56 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | 6.2.0-1014.14~22.04.1 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | 6.2.0-1014.14~22.04.1 | USN-6412-1 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1049.56.1 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1049.56.1 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | 6.2.0-1014.14~22.04.1.1 | USN-6412-1 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | 6.2.0-1014.14~22.04.1.1 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1044.52 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1044.52 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | 6.2.0-1016.18~22.04.1 | USN-6412-1 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | 6.2.0-1016.18~22.04.1 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1044.49 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1044.49 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1030.35 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1030.35 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | 6.2.0-34.34~22.04.1 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | 6.2.0-34.34~22.04.1 | USN-6412-1 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1040.43 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1040.43 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1043.49 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1043.49 | USN-6445-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1044.49 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1044.49 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-86.95 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-86.95 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | 6.2.0-1014.14~22.04.1 | USN-6412-1 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | 6.2.0-1014.14~22.04.1 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1037.37 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1037.37 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | 6.2.0-1011.11 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | 6.2.0-1011.11 | USN-6466-1 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1021.21 | USN-6385-1 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | 6.1.0-1021.21 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | 6.1.0-1021.21 | USN-6343-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1045.51 | USN-6416-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1045.51 | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1040.43 | USN-6416-3 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1040.43 | UBUNTU-CVE-2023-4194 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2023-4194 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 5.15.0-1025.29 | UBUNTU-CVE-2023-4194 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Virtualization 4 | see references |
Weakness: CWE-843 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
References
- RHSA-2023:6583 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2023-4194 vdb-entry, x_refsource_REDHAT
- RHBZ#2229498 issue-tracking, x_refsource_REDHAT
- https://lore.kernel.org/all/20230731164237.48365-1-lersek@redhat.com/
- https://lore.kernel.org/all/20230731164237.48365-2-lersek@redhat.com/
- https://lore.kernel.org/all/20230731164237.48365-3-lersek@redhat.com/
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html x_transferred
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/344H6HO6SSC4KT7PDFXSDIXKMKHISSGF/ x_transferred
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3TYLSJ2SAI7RF56ZLQ5CQWCJLVJSD73Q/ x_transferred
- https://security.netapp.com/advisory/ntap-20231027-0002/ x_transferred
- https://www.debian.org/security/2023/dsa-5480 x_transferred
- https://www.debian.org/security/2023/dsa-5492 x_transferred