CVE-2023-28999

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Source
https://cve.org/CVERecord?id=CVE-2023-28999
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-28999.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-28999
Aliases
  • GHSA-8875-wxww-3rr8
Downstream
Published
2023-04-04T12:51:08.241Z
Modified
2026-04-12T01:01:20.213919Z
Severity
  • 6.9 (Medium) CVSS_V3 - CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L CVSS Calculator
Summary
Nextcloud: Lack of authenticity of metadata keys allows a malicious server to gain access to E2EE folders
Details

Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure and add new files.​ This issue is fixed in Nextcloud Desktop 3.8.0, Nextcloud Android 3.25.0, and Nextcloud iOS 4.8.0. No known workarounds are available.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28999.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-325"
    ]
}
References

Affected packages

Git
github.com/nextcloud/android

Affected ranges

Type
GIT
Repo
https://github.com/nextcloud/android
Events
Introduced
e7b260f74daa548efada6f8127c8fbecda38c5f9
Fixed
729ff137b27c49ebe1e9fcb74f420cc625d1084c
Database specific 
{
    "versions": [
        {
            "introduced": "3.13.0"
        },
        {
            "fixed": "3.25.0"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-28999.json"
github.com/nextcloud/desktop

Affected ranges

Type
GIT
Repo
https://github.com/nextcloud/desktop
Events
Introduced
ff175088a391007b66bfca89ef35cf29e37cf001
Fixed
b15f9376b2761b7dd9726aa3a110b1077ef57094

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-28999.json"
vanir_signatures_modified 
"2026-04-12T01:01:20Z"
vanir_signatures 
[
    {
        "target": {
            "file": "src/libsync/vfs/cfapi/hydrationjob.cpp",
            "function": "OCC::HydrationJob::slotCheckFolderEncryptedMetadata"
        },
        "id": "CVE-2023-28999-3f19e2b9",
        "source": "https://github.com/nextcloud/desktop/commit/b15f9376b2761b7dd9726aa3a110b1077ef57094",
        "signature_type": "Function",
        "deprecated": false,
        "digest": {
            "length": 1163.0,
            "function_hash": "101649583395170060309763545000262885430"
        },
        "signature_version": "v1"
    },
    {
        "target": {
            "file": "src/libsync/vfs/cfapi/vfs_cfapi.cpp"
        },
        "id": "CVE-2023-28999-9075e7af",
        "source": "https://github.com/nextcloud/desktop/commit/b15f9376b2761b7dd9726aa3a110b1077ef57094",
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "226972522689971151640741611966896760315",
                "6761838625930364135452577204500142493",
                "323669476810890076709762257632198786258",
                "95887726979464850580531724852363227229"
            ]
        },
        "signature_version": "v1"
    },
    {
        "target": {
            "file": "src/libsync/clientsideencryption.cpp"
        },
        "id": "CVE-2023-28999-9fddbf04",
        "source": "https://github.com/nextcloud/desktop/commit/b15f9376b2761b7dd9726aa3a110b1077ef57094",
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "184768993908712843135059723499629664191",
                "263677768931353285972848147053892066026",
                "17820304022799912052226267570635727754",
                "247028315761105296216753869082916283057",
                "319535011696866341067214169084501544005",
                "292697869727850455733347997137348214683",
                "8399253846568777635206679802043293474",
                "142788300903851892392876694930015003353",
                "167288391152401584260673006011530660946",
                "276384299447226568337644657957432986217"
            ]
        },
        "signature_version": "v1"
    },
    {
        "target": {
            "file": "src/libsync/vfs/cfapi/hydrationjob.cpp"
        },
        "id": "CVE-2023-28999-bedc4517",
        "source": "https://github.com/nextcloud/desktop/commit/b15f9376b2761b7dd9726aa3a110b1077ef57094",
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "157470299154970211748345832830191459969",
                "189283325233178648012609185252195439590",
                "40148955164420873735148142005907145131",
                "227522160379164553196595713112759768916"
            ]
        },
        "signature_version": "v1"
    },
    {
        "target": {
            "file": "src/libsync/vfs/cfapi/vfs_cfapi.cpp",
            "function": "VfsCfApi::scheduleHydrationJob"
        },
        "id": "CVE-2023-28999-dcf1eb19",
        "source": "https://github.com/nextcloud/desktop/commit/b15f9376b2761b7dd9726aa3a110b1077ef57094",
        "signature_type": "Function",
        "deprecated": false,
        "digest": {
            "length": 1135.0,
            "function_hash": "174592396439734652915231344929463948220"
        },
        "signature_version": "v1"
    }
]
github.com/nextcloud/ios

Affected ranges

Type
GIT
Repo
https://github.com/nextcloud/ios
Events
Introduced
3f03074d8f5060733256281d063db9e2cbc43552
Fixed
206f5d46966c0504e199307477d8ee759faa6607
Database specific 
{
    "versions": [
        {
            "introduced": "3.0.5"
        },
        {
            "fixed": "4.8.0"
        }
    ]
}

Affected versions

3.*
3.0.10
3.0.11
3.0.12
3.0.14
3.0.15
3.1.0
3.2.0
3.3.0
3.4.0
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
4.*
4.0.0
4.0.1
4.0.2
4.0.3
4.0.4
4.0.5
4.0.6
4.1.0
4.2.0
4.2.1
4.2.2
4.3.0
4.3.1
4.4.0
4.4.1
4.4.2
4.4.3
4.4.4
4.5.0
4.5.1
4.5.2
4.5.3
4.5.4
4.5.5
4.5.6
4.5.7
4.6.0
4.7.0
v3.*
v3.0.5
v3.0.6
v3.0.7
v3.0.8

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-28999.json"