CVE-2024-21626 (GCVE-0-2024-21626)
Vulnerability from cvelistv5 – Published: 2024-01-31 21:31 – Updated: 2026-06-25 22:32
VLAI
Title
runc container breakout through process.cwd trickery and leaked fds
Summary
runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem ("attack 2"). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run ("attack 1"). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes ("attack 3a" and "attack 3b"). runc 1.1.12 includes patches for this issue.
Severity
8.6 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
40 references
Impacted products
31 products
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{\"url\": \"https://access.redhat.com/errata/RHSA-2024:10149\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2025:0650\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:10520\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2025:0115\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0758\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0760\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0757\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0764\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0759\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0748\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0752\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0756\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0755\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:0670\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Red Hat Enterprise Linux (RHEL) and OpenShift ships with SELinux in targeted enforcing mode, which prevents the container processes from accessing host content and mitigates this attack. Dockerfiles can be inspected on the \u0027RUN\u0027\\u00a0and \u0027WORKDIR\u0027 directives to ensure that there are no escapes or malicious paths, which are an indication of compromise. Limiting access and only using trusted container images can help prevent unauthorized access and malicious attacks.\"}], \"x_generator\": {\"engine\": \"sadp-cli 0.1.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A file descriptor leak issue was found in the runc package. While a user performs `O_CLOEXEC` all file descriptors before executing the container code, the file descriptor is open when performing `setcwd(2)`, which means that the reference can be kept alive in the container by configuring the working directory to be a path resolved through the file descriptor. The non-dumpable bit is unset after `execve`, meaning there are multiple ways to attack this other than bad configurations. The only way to defend against it entirely is to close all unneeded file descriptors.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-200\", \"description\": \"Exposure of Sensitive Information to an Unauthorized Actor\"}]}], \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-06-25T22:32:38.382Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-21626\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-04-19T04:01:01.696064Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-05-15T16:02:23.460Z\"}}], \"cna\": {\"title\": \"runc container breakout through process.cwd trickery and leaked fds\", \"source\": {\"advisory\": \"GHSA-xr7r-f8xq-vfvv\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 8.6, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"opencontainers\", \"product\": \"runc\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e=v1.0.0-rc93, \u003c 1.1.12\"}]}], \"references\": [{\"url\": \"https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv\", \"name\": \"https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7ce8ecf\", \"name\": \"https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7ce8ecf\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/opencontainers/runc/releases/tag/v1.1.12\", \"name\": \"https://github.com/opencontainers/runc/releases/tag/v1.1.12\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/02/01/1\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/02/02/3\"}, {\"url\": \"http://packetstormsecurity.com/files/176993/runc-1.1.11-File-Descriptor-Leak-Privilege-Escalation.html\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SYMO3BANINS6RGFQFKPRG4FIOJ7GWYTL/\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2NLXNE23Q5ESQUAI22Z7A63JX2WMPJ2J/\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/02/msg00005.html\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem (\\\"attack 2\\\"). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run (\\\"attack 1\\\"). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes (\\\"attack 3a\\\" and \\\"attack 3b\\\"). runc 1.1.12 includes patches for this issue.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-403\", \"description\": \"CWE-403: Exposure of File Descriptor to Unintended Control Sphere (\u0027File Descriptor Leak\u0027)\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-668\", \"description\": \"CWE-668: Exposure of Resource to Wrong Sphere\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2024-02-19T03:06:14.739Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2024-21626\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-25T22:32:38.382Z\", \"dateReserved\": \"2023-12-29T03:00:44.953Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2024-01-31T21:31:14.391Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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