runc: Malicious image with /dev symlink can trigger limited host filesystem integrity violations
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| opencontainers | runc | affected |
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Configuration 1 [-]
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No data.
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| Opencontainers | Runc |
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| Source | ID | Title |
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Github GHSA |
GHSA-xjvp-4fhw-gc47 | runc: Malicious image with /dev symlink can trigger limited host filesystem integrity violations |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.186% probability within 30 days)
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| Metrics |
ssvc
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| First Time appeared |
Opencontainers
Opencontainers runc |
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| Vendors & Products |
Opencontainers
Opencontainers runc |
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| Description | runc is a CLI tool for spawning and running containers according to the OCI specification. In versions prior to 1.3.6, 1.4.0-rc.1, 1.4.0-rc.12, 1.5.0-rc.1, and 1.5.0-rc.1, when setting up the container rootfs, setupPtmx and setupDevSymlinks call os.Remove and os.Symlink with a filepath.Join string which allow an image with /dev as a symlink to trick runc into deleting files called ptmx on the host or creating a hardcoded set of symlinks with specific names and targets in an arbitrary pre-existing host directory. This issue is not exploitable under Docker, because Docker creates a top-level read-only layer that masks any malicious /dev symlink present in the container image — unlike some other Linux container tooling, whose higher-level runtimes built on runc remain exposed to exploitation via a malicious image. This issue has been fixed in versions 1.3.6, 1.4.3 and 1.5.0. | |
| Title | runc: Malicious image with /dev symlink can trigger limited host filesystem integrity violations | |
| Weaknesses | CWE-61 | |
| References |
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| Metrics |
cvssV3_1
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