A denial of service vulnerability was found in n_tty_receive_char_special in drivers/tty/n_tty.c of the Linux kernel. In this flaw a local attacker with a normal user privilege could delay the loop (due to a changing ldata->read_head, and a missing sanity check) and cause a threat to the system availability.
Weakness
The product compares two entities in a security-relevant context, but the comparison is incorrect.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | * | 4.18 (excluding) |
| Linux | Ubuntu | trusty | * |
| Linux-aws | Ubuntu | esm-infra-legacy/trusty | * |
| Linux-aws | Ubuntu | trusty | * |
| Linux-aws | Ubuntu | trusty/esm | * |
| Linux-aws-5.0 | Ubuntu | bionic | * |
| Linux-aws-5.0 | Ubuntu | esm-infra/bionic | * |
| Linux-aws-5.3 | Ubuntu | bionic | * |
| Linux-aws-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-azure | Ubuntu | bionic | * |
| Linux-azure | Ubuntu | esm-infra-legacy/trusty | * |
| Linux-azure | Ubuntu | esm-infra/bionic | * |
| Linux-azure | Ubuntu | trusty | * |
| Linux-azure | Ubuntu | trusty/esm | * |
| Linux-azure-5.3 | Ubuntu | bionic | * |
| Linux-azure-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-azure-edge | Ubuntu | bionic | * |
| Linux-azure-edge | Ubuntu | esm-infra/bionic | * |
| Linux-gcp | Ubuntu | bionic | * |
| Linux-gcp | Ubuntu | esm-infra/bionic | * |
| Linux-gcp-5.3 | Ubuntu | bionic | * |
| Linux-gcp-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-gcp-edge | Ubuntu | bionic | * |
| Linux-gcp-edge | Ubuntu | esm-infra/bionic | * |
| Linux-gke-4.15 | Ubuntu | bionic | * |
| Linux-gke-4.15 | Ubuntu | esm-infra/bionic | * |
| Linux-gke-5.0 | Ubuntu | bionic | * |
| Linux-hwe | Ubuntu | bionic | * |
| Linux-hwe | Ubuntu | esm-infra/bionic | * |
| Linux-hwe-edge | Ubuntu | bionic | * |
| Linux-hwe-edge | Ubuntu | esm-infra/bionic | * |
| Linux-hwe-edge | Ubuntu | esm-infra/xenial | * |
| Linux-hwe-edge | Ubuntu | xenial | * |
| Linux-lts-trusty | Ubuntu | precise/esm | * |
| Linux-lts-xenial | Ubuntu | esm-infra-legacy/trusty | * |
| Linux-lts-xenial | Ubuntu | trusty | * |
| Linux-lts-xenial | Ubuntu | trusty/esm | * |
| Linux-oem | Ubuntu | bionic | * |
| Linux-oem | Ubuntu | esm-infra/bionic | * |
| Linux-oem | Ubuntu | xenial | * |
| Linux-oem-osp1 | Ubuntu | bionic | * |
| Linux-oracle-5.0 | Ubuntu | bionic | * |
| Linux-oracle-5.0 | Ubuntu | esm-infra/bionic | * |
| Linux-oracle-5.3 | Ubuntu | bionic | * |
| Linux-oracle-5.3 | Ubuntu | esm-infra/bionic | * |
| Linux-raspi2 | Ubuntu | esm-infra/focal | * |
| Linux-raspi2 | Ubuntu | focal | * |
| Linux-riscv | Ubuntu | esm-infra/focal | * |
| Linux-riscv | Ubuntu | focal | * |
Extended Description
This Pillar covers several possibilities:
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/10.html
- https://cwe.mitre.org/data/definitions/120.html
- https://cwe.mitre.org/data/definitions/14.html
- https://cwe.mitre.org/data/definitions/15.html
- https://cwe.mitre.org/data/definitions/182.html
- https://cwe.mitre.org/data/definitions/24.html
- https://cwe.mitre.org/data/definitions/267.html
- https://cwe.mitre.org/data/definitions/3.html
- https://cwe.mitre.org/data/definitions/41.html
- https://cwe.mitre.org/data/definitions/43.html
- https://cwe.mitre.org/data/definitions/44.html
- https://cwe.mitre.org/data/definitions/45.html
- https://cwe.mitre.org/data/definitions/46.html
- https://cwe.mitre.org/data/definitions/47.html
- https://cwe.mitre.org/data/definitions/52.html
- https://cwe.mitre.org/data/definitions/53.html
- https://cwe.mitre.org/data/definitions/6.html
- https://cwe.mitre.org/data/definitions/64.html
- https://cwe.mitre.org/data/definitions/67.html
- https://cwe.mitre.org/data/definitions/7.html
- https://cwe.mitre.org/data/definitions/71.html
- https://cwe.mitre.org/data/definitions/73.html
- https://cwe.mitre.org/data/definitions/78.html
- https://cwe.mitre.org/data/definitions/79.html
- https://cwe.mitre.org/data/definitions/8.html
- https://cwe.mitre.org/data/definitions/80.html
- https://cwe.mitre.org/data/definitions/88.html
- https://cwe.mitre.org/data/definitions/9.html
- https://cwe.mitre.org/data/definitions/92.html