ghsa-cm9x-c3rh-7rc4
Vulnerability from github
Published
2022-12-29 01:49
Modified
2022-12-29 01:49
Severity
Summary
CRI-O vulnerable to /etc/passwd tampering resulting in Privilege Escalation
Details
Impact
It is possible to craft an environment variable with newlines to add entries to a container's /etc/passwd. It is possible to circumvent admission validation of username/UID by adding such an entry.
Note: because the pod author is in control of the container's /etc/passwd, this is not considered a new risk factor. However, this advisory is being opened for transparency and as a way of tracking fixes.
Patches
1.26.0 will have the fix. More patches will be posted as they're available.
Workarounds
Additional security controls like SELinux should prevent any damage a container is able to do with root on the host. Using SELinux is recommended because this class of attack is already possible by manually editing the container's /etc/passwd
References
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/cri-o/cri-o"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.26.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-4318"
],
"database_specific": {
"cwe_ids": [
"CWE-538",
"CWE-913"
],
"github_reviewed": true,
"github_reviewed_at": "2022-12-29T01:49:47Z",
"nvd_published_at": "2023-09-25T20:15:10Z",
"severity": "MODERATE"
},
"details": "### Impact\nIt is possible to craft an environment variable with newlines to add entries to a container\u0027s /etc/passwd. It is possible to circumvent admission validation of username/UID by adding such an entry.\n\nNote: because the pod author is in control of the container\u0027s /etc/passwd, this is not considered a new risk factor. However, this advisory is being opened for transparency and as a way of tracking fixes.\n\n### Patches\n1.26.0 will have the fix. More patches will be posted as they\u0027re available.\n\n### Workarounds\nAdditional security controls like SELinux should prevent any damage a container is able to do with root on the host. Using SELinux is recommended because this class of attack is already possible by manually editing the container\u0027s /etc/passwd \n\n### References\n",
"id": "GHSA-cm9x-c3rh-7rc4",
"modified": "2022-12-29T01:49:47Z",
"published": "2022-12-29T01:49:47Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/cri-o/cri-o/security/advisories/GHSA-cm9x-c3rh-7rc4"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-4318"
},
{
"type": "WEB",
"url": "https://github.com/cri-o/cri-o/pull/6450"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:1033"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2023:1503"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2022-4318"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2152703"
},
{
"type": "PACKAGE",
"url": "https://github.com/cri-o/cri-o"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "CRI-O vulnerable to /etc/passwd tampering resulting in Privilege Escalation"
}
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