Описание
runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7, 1.3.2 and 1.4.0-rc.2, an attacker can trick runc into misdirecting writes to /proc to other procfs files through the use of a racing container with shared mounts (we have also verified this attack is possible to exploit using a standard Dockerfile with docker buildx build as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a tmpfs or theoretically other methods such as regular bind-mounts. While similar, the mitigation applied for the related CVE, CVE-2019-19921, was fairly limited and effectively only caused runc to verify that when LSM labels are written they are actually procfs files. This issue is fixed in versions 1.2.8, 1.3.3, and 1.4.0-rc.3.
| Релиз | Статус | Примечание |
|---|---|---|
| devel | needs-triage | |
| esm-apps/bionic | ignored | backport too intrusive |
| esm-apps/noble | ignored | backport too intrusive |
| esm-apps/xenial | ignored | backport too intrusive |
| esm-infra/focal | ignored | backport too intrusive |
| jammy | ignored | backport too intrusive |
| noble | ignored | backport too intrusive |
| plucky | ignored | backport too intrusive |
| questing | ignored | backport too intrusive |
| upstream | released | 1.2.8,1.3.3,1.4.1 |
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| Релиз | Статус | Примечание |
|---|---|---|
| devel | needs-triage | |
| esm-apps/focal | ignored | backport too intrusive |
| esm-apps/jammy | released | 1.3.3-0ubuntu1~22.04.2 |
| jammy | released | 1.3.3-0ubuntu1~22.04.2 |
| noble | released | 1.3.3-0ubuntu1~24.04.2 |
| plucky | released | 1.3.3-0ubuntu1~25.04.2 |
| questing | released | 1.3.3-0ubuntu1~25.10.2 |
| upstream | released | 1.2.8,1.3.3,1.4.1 |
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| Релиз | Статус | Примечание |
|---|---|---|
| bionic | DNE | |
| devel | needs-triage | |
| focal | DNE | |
| jammy | DNE | |
| noble | DNE | |
| questing | released | 1.3.3-0ubuntu1~25.10.2 |
| trusty | DNE | |
| upstream | released | 1.2.8,1.3.3,1.4.1 |
| xenial | DNE |
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EPSS
Связанные уязвимости
runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7, 1.3.2 and 1.4.0-rc.2, an attacker can trick runc into misdirecting writes to /proc to other procfs files through the use of a racing container with shared mounts (we have also verified this attack is possible to exploit using a standard Dockerfile with docker buildx build as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a tmpfs or theoretically other methods such as regular bind-mounts. While similar, the mitigation applied for the related CVE, CVE-2019-19921, was fairly limited and effectively only caused runc to verify that when LSM labels are written they are actually procfs files. This issue is fixed in versions 1.2.8, 1.3.3, and 1.4.0-rc.3.
runc: LSM labels can be bypassed with malicious config using dummy procfs files
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Уязвимость инструмента для запуска изолированных контейнеров runc, связанная с состоянием гонки, разрешающим отслеживание ссылок, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации
EPSS