gsd-2021-44142
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide "...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver." Samba versions prior to 4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd, typically root.
Aliases
Aliases
{
"GSD": {
"affected_component": " VFS module vfs_fruit",
"alias": "CVE-2021-44142",
"attack_vector": "network access",
"description": "To quote the Samba advisory: \n\n All versions of Samba prior to 4.13.17 are vulnerable to an out-of-bounds heap read write vulnerability that allows remote attackers to execute arbitrary code as root on affected Samba installations that use the VFS module vfs_fruit. \n\n The specific flaw exists within the parsing of EA metadata when opening files in smbd. Access as a user that has write access to a file\u0027s extended attributes is required to exploit this vulnerability. Note that this could be a guest or unauthenticated user if such users are allowed write access to file extended attributes. \n\n The problem in vfs_fruit exists in the default configuration of the fruit VFS module using fruit:metadata=netatalk or fruit:resource=file. If both options are set to different settings than the default values, the system is not affected by the security issue.",
"id": "GSD-2021-44142",
"impact": "code execution as root",
"notes": "",
"product_name": "Samba",
"product_version": "\u003c4.13.17",
"references": [
"https://www.samba.org/samba/security/CVE-2021-44142.html",
"https://access.redhat.com/security/cve/cve-2021-44142",
"https://ubuntu.com/security/CVE-2021-44142",
"https://ubuntu.com/security/notices/USN-5260-1",
"https://ubuntu.com/security/notices/USN-5260-2",
"https://www.synology.com/en-us/security/advisory/Synology_SA_22_02",
"https://support.f5.com/csp/article/K84695749",
"https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin",
"https://www.whitesourcesoftware.com/resources/blog/samba-vulnerability-cve-2021-44142/",
"https://www.theregister.com/2022/02/02/samba_vfs_fruit_vulnerability/",
"https://www.suse.com/security/cve/CVE-2021-44142.html",
"https://www.debian.org/security/2022/dsa-5071",
"https://access.redhat.com/errata/RHSA-2022:0664",
"https://access.redhat.com/errata/RHSA-2022:0663",
"https://access.redhat.com/errata/RHSA-2022:0458",
"https://access.redhat.com/errata/RHSA-2022:0457",
"https://access.redhat.com/errata/RHSA-2022:0332",
"https://access.redhat.com/errata/RHSA-2022:0331",
"https://access.redhat.com/errata/RHSA-2022:0330",
"https://access.redhat.com/errata/RHSA-2022:0329",
"https://access.redhat.com/errata/RHSA-2022:0328",
"https://advisories.mageia.org/CVE-2021-44142.html",
"https://security.archlinux.org/CVE-2021-44142",
"https://alas.aws.amazon.com/cve/html/CVE-2021-44142.html",
"https://linux.oracle.com/cve/CVE-2021-44142.html"
],
"reporter": "kurtseifried",
"reporter_id": 582211,
"vendor_name": "Samba",
"vulnerability_type": "out-of-bounds heap read write"
},
"OSV": {
"affected": [
{
"package": {
"ecosystem": "GSD",
"name": "Samba"
},
"versions": [
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]
}
],
"alias": "CVE-2021-44142",
"details": "To quote the Samba advisory: \n\n All versions of Samba prior to 4.13.17 are vulnerable to an out-of-bounds heap read write vulnerability that allows remote attackers to execute arbitrary code as root on affected Samba installations that use the VFS module vfs_fruit. \n\n The specific flaw exists within the parsing of EA metadata when opening files in smbd. Access as a user that has write access to a file\u0027s extended attributes is required to exploit this vulnerability. Note that this could be a guest or unauthenticated user if such users are allowed write access to file extended attributes. \n\n The problem in vfs_fruit exists in the default configuration of the fruit VFS module using fruit:metadata=netatalk or fruit:resource=file. If both options are set to different settings than the default values, the system is not affected by the security issue.",
"id": "GSD-2021-44142",
"modified": "2022-02-01T23:00:11.123456Z",
"published": "2022-02-01T23:00:11.123456Z",
"references": [
{
"type": "VENDOR",
"url": "https://www.samba.org/samba/security/CVE-2021-44142.html"
},
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"url": "https://access.redhat.com/security/cve/cve-2021-44142"
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},
{
"type": "VENDOR",
"url": "https://support.f5.com/csp/article/K84695749"
},
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"type": "WEB",
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},
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{
"type": "WEB",
"url": "https://www.theregister.com/2022/02/02/samba_vfs_fruit_vulnerability/"
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"summary": "Remote code execution as root in Samba prior to version 4.13.17"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
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"url": "https://bugzilla.samba.org/show_bug.cgi?id=14914"
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{
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"url": "https://security.gentoo.org/glsa/202309-06"
}
]
},
"source": {
"discovery": "UNKNOWN"
}
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"confidentialityImpact": "HIGH",
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"scope": "UNCHANGED",
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"lastModifiedDate": "2023-09-17T09:15Z",
"publishedDate": "2022-02-21T15:15Z"
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}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.