GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration
Common Weakness Enumeration

CWE-281

Allowed

Improper Preservation of Permissions

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended.

439 vulnerabilities reference this CWE, most recent first.

GHSA-CPFP-M5QW-C4R3

Vulnerability from github – Published: 2024-08-15 18:31 – Updated: 2025-05-22 20:00
VLAI
Summary
Improper Preservation of Permissions in xxl-job
Details

Insecure Permissions vulnerability in xxl-job v.2.4.1 allows a remote attacker to execute arbitrary code via the Sub-Task ID component.

Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.4.1"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "com.xuxueli:xxl-job-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-42681"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-276",
      "CWE-277",
      "CWE-281"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-08-15T22:19:00Z",
    "nvd_published_at": "2024-08-15T17:15:18Z",
    "severity": "HIGH"
  },
  "details": "Insecure Permissions vulnerability in xxl-job v.2.4.1 allows a remote attacker to execute arbitrary code via the Sub-Task ID component.",
  "id": "GHSA-cpfp-m5qw-c4r3",
  "modified": "2025-05-22T20:00:48Z",
  "published": "2024-08-15T18:31:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42681"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xuxueli/xxl-job/issues/3516"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xuxueli/xxl-job/commit/a2dc9011310628f3e18c3a5095e7e6a946d017bd"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/xuxueli/xxl-job"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Improper Preservation of Permissions in xxl-job"
}

GHSA-CR5X-X94V-GF96

Vulnerability from github – Published: 2025-04-01 00:30 – Updated: 2025-11-04 00:32
VLAI
Details

A parsing issue in the handling of directory paths was addressed with improved path validation. This issue is fixed in macOS Ventura 13.7.5, iOS 18.4 and iPadOS 18.4, macOS Sequoia 15.4, macOS Sonoma 14.7.5. An app may be able to gain root privileges.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2025-30456"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-281"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-03-31T23:15:27Z",
    "severity": "HIGH"
  },
  "details": "A parsing issue in the handling of directory paths was addressed with improved path validation. This issue is fixed in macOS Ventura 13.7.5, iOS 18.4 and iPadOS 18.4, macOS Sequoia 15.4, macOS Sonoma 14.7.5. An app may be able to gain root privileges.",
  "id": "GHSA-cr5x-x94v-gf96",
  "modified": "2025-11-04T00:32:24Z",
  "published": "2025-04-01T00:30:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-30456"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/122371"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/122373"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/122374"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/122375"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2025/Apr/10"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2025/Apr/4"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2025/Apr/8"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2025/Apr/9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-CR82-M62C-8J4W

Vulnerability from github – Published: 2022-05-24 17:34 – Updated: 2022-05-24 17:34
VLAI
Details

Improper preservation of permissions in Nagios XI 5.7.4 allows a local, low-privileged, authenticated user to weaken the permissions of files, resulting in low-privileged users being able to write to and execute arbitrary PHP code with root privileges.

Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2020-5796"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-281"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-11-13T20:15:00Z",
    "severity": "HIGH"
  },
  "details": "Improper preservation of permissions in Nagios XI 5.7.4 allows a local, low-privileged, authenticated user to weaken the permissions of files, resulting in low-privileged users being able to write to and execute arbitrary PHP code with root privileges.",
  "id": "GHSA-cr82-m62c-8j4w",
  "modified": "2022-05-24T17:34:06Z",
  "published": "2022-05-24T17:34:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-5796"
    },
    {
      "type": "WEB",
      "url": "https://www.tenable.com/security/research/tra-2020-61"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-CRM9-RR9P-QWR6

Vulnerability from github – Published: 2025-01-28 00:32 – Updated: 2025-01-30 18:32
VLAI
Details

A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sonoma 14.7.2, macOS Sequoia 15.2. An app may be able to approve a launch daemon without user consent.

Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-54516"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-281"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-27T22:15:13Z",
    "severity": "LOW"
  },
  "details": "A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sonoma 14.7.2, macOS Sequoia 15.2. An app may be able to approve a launch daemon without user consent.",
  "id": "GHSA-crm9-rr9p-qwr6",
  "modified": "2025-01-30T18:32:05Z",
  "published": "2025-01-28T00:32:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-54516"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/121839"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/121840"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-CXMV-3HC7-9RH3

Vulnerability from github – Published: 2025-10-31 00:30 – Updated: 2025-11-06 18:32
VLAI
Details

Nagios Log Server versions prior to 2024R1.3.2 contain a privilege escalation vulnerability in the account email-change workflow. A user could set their own email to an invalid value and, due to insufficient validation and authorization checks tied to email identity state, trigger inconsistent account state that granted elevated privileges or bypassed intended access controls.

Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2025-34298"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-281"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-30T22:15:49Z",
    "severity": "HIGH"
  },
  "details": "Nagios Log Server versions prior to 2024R1.3.2 contain a privilege escalation vulnerability in the account email-change workflow. A user could set their own email to an invalid value and, due to insufficient validation and authorization checks tied to email identity state, trigger inconsistent account state that granted elevated privileges or bypassed intended access controls.",
  "id": "GHSA-cxmv-3hc7-9rh3",
  "modified": "2025-11-06T18:32:49Z",
  "published": "2025-10-31T00:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-34298"
    },
    {
      "type": "WEB",
      "url": "https://www.nagios.com/changelog/nagios-log-server-2024r1"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/nagios-log-server-set-email-privilege-escalation"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-F5WC-C3C7-36MC

Vulnerability from github – Published: 2026-06-25 22:14 – Updated: 2026-08-11 15:31
VLAI
Summary
golang.org/x/crypto doesn't drop invoking agent constraints when forwarding keys
Details

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "golang.org/x/crypto"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.52.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-39832"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-281",
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-25T22:14:00Z",
    "nvd_published_at": "2026-05-22T04:16:22Z",
    "severity": "CRITICAL"
  },
  "details": "When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.",
  "id": "GHSA-f5wc-c3c7-36mc",
  "modified": "2026-08-11T15:31:42Z",
  "published": "2026-06-25T22:14:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39832"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:35833"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:41036"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:41066"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:42146"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:42796"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:43052"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:43692"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:49944"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:52857"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:52910"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-39832"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480685"
    },
    {
      "type": "PACKAGE",
      "url": "https://cs.opensource.google/go/x/crypto"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/778642"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/79435"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2026-5006"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39832.json"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:36199"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:36319"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:36625"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:36648"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:36651"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:36796"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:36797"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:37072"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:37123"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:37271"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:37387"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:37410"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:40118"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:40262"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:40945"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:40972"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:41019"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:41031"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "golang.org/x/crypto doesn\u0027t drop invoking agent constraints when forwarding keys"
}

GHSA-F626-W254-W424

Vulnerability from github – Published: 2025-04-10 21:31 – Updated: 2025-04-10 21:31
VLAI
Details

Improper Preservation of Permissions vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/editpage/IntroMessageBuilder.Php, includes/Permissions/PermissionManager.Php, includes/Permissions/RestrictionStore.Php.

This issue affects MediaWiki: before 1.42.6, 1.43.1.

Severity
0.0 (None)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/RE:M/U:Green
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2025-32697"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-281"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-10T19:16:01Z",
    "severity": "LOW"
  },
  "details": "Improper Preservation of Permissions vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/editpage/IntroMessageBuilder.Php, includes/Permissions/PermissionManager.Php, includes/Permissions/RestrictionStore.Php.\n\nThis issue affects MediaWiki: before 1.42.6, 1.43.1.",
  "id": "GHSA-f626-w254-w424",
  "modified": "2025-04-10T21:31:09Z",
  "published": "2025-04-10T21:31:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-32697"
    },
    {
      "type": "WEB",
      "url": "https://phabricator.wikimedia.org/T140010"
    },
    {
      "type": "WEB",
      "url": "https://phabricator.wikimedia.org/T24521"
    },
    {
      "type": "WEB",
      "url": "https://phabricator.wikimedia.org/T62109"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:M/U:Green",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-F8G7-2XJC-7MFH

Vulnerability from github – Published: 2026-09-10 22:51 – Updated: 2026-09-10 22:51
VLAI
Summary
rclone: Directory metadata (chmod/chown/chtimes) applied through a planted symlink in rclone local --links escapes the destination
Details

Summary

With -l/--links, rclone's local backend recreates a source .rclonelink object as a real symlink at the destination verbatim (preserved by design for faithful backups). Directory-metadata application, however, does not go through the os.Root sandbox and does not use NOFOLLOW syscalls. A local Directory always has translatedLink=false, so when the destination path already exists as a planted symlink, rclone applies chmod/chown/chtimes through that symlink to a target outside the destination tree. An attacker who controls the source contents (malicious/compromised remote, shared bucket) obtains attacker-valued chmod/chown/chtimes of an arbitrary path outside the backup destination.

Root Cause

  • MkdirMetadata (backend/local/local.go:895) calls f.lstat (=os.Lstat, local.go:465) on the destination path. On a pre-planted symlink, os.Lstat succeeds, so the errors.Is(err, os.ErrNotExist) branch (local.go:896) that would create a real directory via the os.Root-guarded f.Mkdir is not taken. Instead a Directory is built directly on the symlink path.
  • writeMetadataToFile runs raw os.Chown (backend/local/metadata.go:131) and os.Chmod (metadata.go:158); setTimes runs raw os.Chtimes (backend/local/local.go:1318).
  • The CVE-2024-52522 NOFOLLOW fix (os.Lchown/lChmod/lChtimes) is gated on if o.translatedLink (metadata.go:128/150, local.go:1315). A Directory (newDirectory→newObject with no .rclonelink suffix) is never translatedLink, so it always takes the raw following branch. The CVE-2026-54572 os.Root fix covers only content writes, not metadata syscalls.

Impact

Attacker-controlled chmod/chown/chtimes (values taken from the source directory's mode/uid/gid/mtime) applied to any file or directory outside the destination. chtimes (mtime) escape works with just --links and default flags; chmod/chown escape additionally needs --metadata. When rclone runs as root with --metadata and a source uid=0, the chown primitive reaches the CVE-2024-52522 privilege-escalation ceiling (take ownership of an out-of-tree path).

Proof of Concept

mkdir -p /src /dest
# run 1: source object pwn.rclonelink whose body = /home/victim/secret.d
printf '/home/victim/secret.d' > /src/pwn.rclonelink
rclone sync --links /src /dest              # plants /dest/pwn -> /home/victim/secret.d
# attacker swaps source pwn to a real directory with chosen metadata:
rm /src/pwn.rclonelink ; mkdir -p /src/pwn/keep ; chmod 777 /src/pwn
rclone sync --links --metadata /src /dest   # MkdirMetadata sees /dest/pwn exists (symlink) ->
                                            # chmod 0777 applied THROUGH it to /home/victim/secret.d
ls -ld /home/victim/secret.d                # => drwxrwxrwx  (outside dir, attacker-chosen mode)

A single-run PoC is achievable against directory-based object sources (drive/onedrive-class) that satisfy both ReadDirMetadata and CanHaveEmptyDirectories and can present pwn.rclonelink and pwn/ simultaneously. Local→local uses the two-run backup model (same repeated-backup model as CVE-2024-52522 and CVE-2026-54572). Verified end-to-end against the real fs/sync.Sync engine on HEAD: the two-run backup backdated the outside target's mtime and chmod'd it 0777 while os.Root correctly blocked the content-copy of pwn/keep — isolating the metadata gap.

Attack Chain

  1. Entry. Victim runs rclone copy/sync --links [--metadata] <untrusted-remote>: /dest. Attacker controls source contents.
  2. Guard: none — --links copying an untrusted remote is a documented, supported operation.
  3. Plant symlink. Source serves pwn.rclonelink with body = absolute outside path; rclone recreates dst/pwn → outside.
  4. Guard: Fs.symlink routes creation through os.Root.Symlink (local.go:~1552).
  5. Bypass proof: os.Root creates the link verbatim by design (commit 1154afe); the upstream os.Root fix's test TestSymlinkEscapeWriteThroughBlocked confirms only write-through is refused, the link is planted.
  6. Deferred dir-metadata fires after transfers. Source presents non-empty dir pwn; setDelayedDirModTimes (sync.go:1002) runs strictly after stopTransfers() (sync.go:988) — after the symlink is planted.
  7. Guard: MkdirMetadata would create a real dir via os.Root-guarded f.Mkdir (local.go:897) inside its errors.Is(err, os.ErrNotExist) branch.
  8. Bypass proof: os.Lstat (local.go:465) on the existing symlink returns success, so the ErrNotExist branch (local.go:896) is NOT taken; f.Mkdir/os.Root never runs. Empirically os.IsNotExist(err)=false for the planted symlink.
  9. Sink follows the symlink. CopyDirMetadata→MkdirMetadata→writeMetadataToFile runs os.Chown/os.Chmod (metadata.go:131/158); DirSetModTime→setTimes runs os.Chtimes (local.go:1318) — all on o.path="dst/pwn" with translatedLink=false.
  10. Guard: CVE-2024-52522 NOFOLLOW branch (os.Lchown/lChmod/lChtimes).
  11. Bypass proof: that branch is gated on if o.translatedLink (metadata.go:128/150, local.go:1315); a Directory always has translatedLink=false, so the raw following branch runs. POSIX-confirmed: chmod 777/touch on a symlink path change the target's mode/mtime.
  12. Impact. chmod/chown/chtimes on an attacker-chosen path outside the destination, with attacker-controlled values.

Bypass Evidence

  • if o.translatedLink gates verified verbatim on v1.75.0 at metadata.go:128/150 and local.go:1315; os.Chown/os.Chmod/os.Chtimes on the else branch at metadata.go:131/158 and local.go:1318.
  • newDirectory→newObject (local.go:581/589/596) never sets the .rclonelink suffix → translatedLink=false for all directories.
  • MkdirMetadata skip branch: os.Lstat succeeds on planted symlink → errors.Is(err, os.ErrNotExist) false at local.go:896 → guarded f.Mkdir skipped.
  • Real fs/sync.Sync E2E on HEAD: TestDirMetadataThroughPlantedSymlink (outside dir → 0777), TestDirSetModTimeThroughPlantedSymlink (mtime set, default-on), TestE2E_TwoRunBackup (backdated outside target while content-copy blocked by os.Root). All PASS. Control TestControl_ContentWriteBlocked confirms harness fidelity.

Affected Versions

<= 1.75.0. Vulnerable code present on latest release tag v1.75.0 and HEAD (5629f26); git log v1.75.0..HEAD -- backend/local/metadata.go backend/local/local.go is empty (no post-release fix).

Suggested Fix

Route directory metadata through os.Root when TranslateSymlinks is set (use fchmodat(AT_SYMLINK_NOFOLLOW)/Lchown/UtimesNanoAt(AT_SYMLINK_NOFOLLOW) on the rel path within the root), and/or extend MkdirMetadata to detect that the pre-existing destination path is a symlink and refuse to apply following-metadata — mirroring the CVE-2024-52522 NOFOLLOW branch that currently exists only for translatedLink objects.

Reported by zx (Jace) — GitHub: @manus-use

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:L
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.75.0"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/rclone/rclone"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.75.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-88016"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59",
      "CWE-281"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-10T22:51:34Z",
    "nvd_published_at": "2026-09-10T16:18:08Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\nWith `-l/--links`, rclone\u0027s local backend recreates a source `.rclonelink` object as a real symlink at the destination **verbatim** (preserved by design for faithful backups). Directory-metadata application, however, does **not** go through the `os.Root` sandbox and does **not** use NOFOLLOW syscalls. A local `Directory` always has `translatedLink=false`, so when the destination path already exists as a planted symlink, rclone applies `chmod`/`chown`/`chtimes` **through** that symlink to a target **outside** the destination tree. An attacker who controls the source contents (malicious/compromised remote, shared bucket) obtains attacker-valued `chmod`/`chown`/`chtimes` of an arbitrary path outside the backup destination.\n\n## Root Cause\n- `MkdirMetadata` (`backend/local/local.go:895`) calls `f.lstat` (=`os.Lstat`, local.go:465) on the destination path. On a pre-planted symlink, `os.Lstat` succeeds, so the `errors.Is(err, os.ErrNotExist)` branch (local.go:896) that would create a real directory via the `os.Root`-guarded `f.Mkdir` is **not** taken. Instead a `Directory` is built directly on the symlink path.\n- `writeMetadataToFile` runs raw `os.Chown` (`backend/local/metadata.go:131`) and `os.Chmod` (`metadata.go:158`); `setTimes` runs raw `os.Chtimes` (`backend/local/local.go:1318`).\n- The CVE-2024-52522 NOFOLLOW fix (`os.Lchown`/`lChmod`/`lChtimes`) is gated on `if o.translatedLink` (metadata.go:128/150, local.go:1315). A `Directory` (`newDirectory`\u2192`newObject` with no `.rclonelink` suffix) is never `translatedLink`, so it always takes the raw *following* branch. The CVE-2026-54572 `os.Root` fix covers only content **writes**, not metadata syscalls.\n\n## Impact\nAttacker-controlled `chmod`/`chown`/`chtimes` (values taken from the source directory\u0027s mode/uid/gid/mtime) applied to any file or directory **outside** the destination. `chtimes` (mtime) escape works with just `--links` and default flags; `chmod`/`chown` escape additionally needs `--metadata`. When rclone runs as root with `--metadata` and a source `uid=0`, the `chown` primitive reaches the CVE-2024-52522 privilege-escalation ceiling (take ownership of an out-of-tree path).\n\n## Proof of Concept\n```\nmkdir -p /src /dest\n# run 1: source object pwn.rclonelink whose body = /home/victim/secret.d\nprintf \u0027/home/victim/secret.d\u0027 \u003e /src/pwn.rclonelink\nrclone sync --links /src /dest              # plants /dest/pwn -\u003e /home/victim/secret.d\n# attacker swaps source pwn to a real directory with chosen metadata:\nrm /src/pwn.rclonelink ; mkdir -p /src/pwn/keep ; chmod 777 /src/pwn\nrclone sync --links --metadata /src /dest   # MkdirMetadata sees /dest/pwn exists (symlink) -\u003e\n                                            # chmod 0777 applied THROUGH it to /home/victim/secret.d\nls -ld /home/victim/secret.d                # =\u003e drwxrwxrwx  (outside dir, attacker-chosen mode)\n```\nA single-run PoC is achievable against directory-based object sources (drive/onedrive-class) that satisfy both `ReadDirMetadata` and `CanHaveEmptyDirectories` and can present `pwn.rclonelink` and `pwn/` simultaneously. Local\u2192local uses the two-run backup model (same repeated-backup model as CVE-2024-52522 and CVE-2026-54572). Verified end-to-end against the real `fs/sync.Sync` engine on HEAD: the two-run backup backdated the outside target\u0027s mtime and chmod\u0027d it 0777 while os.Root correctly blocked the content-copy of `pwn/keep` \u2014 isolating the metadata gap.\n\n## Attack Chain\n1. **Entry.** Victim runs `rclone copy`/`sync --links [--metadata] \u003cuntrusted-remote\u003e: /dest`. Attacker controls source contents.\n   - Guard: none \u2014 `--links` copying an untrusted remote is a documented, supported operation.\n2. **Plant symlink.** Source serves `pwn.rclonelink` with body = absolute outside path; rclone recreates `dst/pwn` \u2192 outside.\n   - Guard: `Fs.symlink` routes creation through `os.Root.Symlink` (local.go:~1552).\n   - Bypass proof: `os.Root` creates the link **verbatim by design** (commit 1154afe); the upstream `os.Root` fix\u0027s test `TestSymlinkEscapeWriteThroughBlocked` confirms only write-*through* is refused, the link is planted.\n3. **Deferred dir-metadata fires after transfers.** Source presents non-empty dir `pwn`; `setDelayedDirModTimes` (sync.go:1002) runs strictly after `stopTransfers()` (sync.go:988) \u2014 after the symlink is planted.\n   - Guard: `MkdirMetadata` would create a real dir via os.Root-guarded `f.Mkdir` (local.go:897) inside its `errors.Is(err, os.ErrNotExist)` branch.\n   - Bypass proof: `os.Lstat` (local.go:465) on the existing symlink returns success, so the `ErrNotExist` branch (local.go:896) is NOT taken; `f.Mkdir`/os.Root never runs. Empirically `os.IsNotExist(err)=false` for the planted symlink.\n4. **Sink follows the symlink.** `CopyDirMetadata`\u2192`MkdirMetadata`\u2192`writeMetadataToFile` runs `os.Chown`/`os.Chmod` (metadata.go:131/158); `DirSetModTime`\u2192`setTimes` runs `os.Chtimes` (local.go:1318) \u2014 all on `o.path=\"dst/pwn\"` with `translatedLink=false`.\n   - Guard: CVE-2024-52522 NOFOLLOW branch (`os.Lchown`/`lChmod`/`lChtimes`).\n   - Bypass proof: that branch is gated on `if o.translatedLink` (metadata.go:128/150, local.go:1315); a `Directory` always has `translatedLink=false`, so the raw following branch runs. POSIX-confirmed: `chmod 777`/`touch` on a symlink path change the *target\u0027s* mode/mtime.\n5. **Impact.** `chmod`/`chown`/`chtimes` on an attacker-chosen path outside the destination, with attacker-controlled values.\n\n## Bypass Evidence\n- `if o.translatedLink` gates verified verbatim on v1.75.0 at metadata.go:128/150 and local.go:1315; `os.Chown`/`os.Chmod`/`os.Chtimes` on the else branch at metadata.go:131/158 and local.go:1318.\n- `newDirectory`\u2192`newObject` (local.go:581/589/596) never sets the `.rclonelink` suffix \u2192 `translatedLink=false` for all directories.\n- `MkdirMetadata` skip branch: `os.Lstat` succeeds on planted symlink \u2192 `errors.Is(err, os.ErrNotExist)` false at local.go:896 \u2192 guarded `f.Mkdir` skipped.\n- Real `fs/sync.Sync` E2E on HEAD: `TestDirMetadataThroughPlantedSymlink` (outside dir \u2192 0777), `TestDirSetModTimeThroughPlantedSymlink` (mtime set, default-on), `TestE2E_TwoRunBackup` (backdated outside target while content-copy blocked by os.Root). All PASS. Control `TestControl_ContentWriteBlocked` confirms harness fidelity.\n\n## Affected Versions\n`\u003c= 1.75.0`. Vulnerable code present on latest release tag v1.75.0 and HEAD (5629f26); `git log v1.75.0..HEAD -- backend/local/metadata.go backend/local/local.go` is empty (no post-release fix).\n\n## Suggested Fix\nRoute directory metadata through `os.Root` when `TranslateSymlinks` is set (use `fchmodat(AT_SYMLINK_NOFOLLOW)`/`Lchown`/`UtimesNanoAt(AT_SYMLINK_NOFOLLOW)` on the `rel` path within the root), and/or extend `MkdirMetadata` to detect that the pre-existing destination path is a symlink and refuse to apply following-metadata \u2014 mirroring the CVE-2024-52522 NOFOLLOW branch that currently exists only for `translatedLink` objects.\n\n---\nReported by **zx (Jace)** \u2014 GitHub: @manus-use",
  "id": "GHSA-f8g7-2xjc-7mfh",
  "modified": "2026-09-10T22:51:34Z",
  "published": "2026-09-10T22:51:34Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rclone/rclone/security/advisories/GHSA-f8g7-2xjc-7mfh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88016"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rclone/rclone/commit/17b0c03338a857bcb0a68d2d4c82ddbdec3f7893"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rclone/rclone/commit/a7ab39d3d1958afa1446982c1dc4e4a73a887e3e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rclone/rclone"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rclone/rclone/releases/tag/v1.75.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rclone: Directory metadata (chmod/chown/chtimes) applied through a planted symlink in rclone local --links escapes the destination"
}

GHSA-FC8M-X59C-5F6R

Vulnerability from github – Published: 2024-07-30 00:34 – Updated: 2026-04-02 21:31
VLAI
Details

An input validation issue was addressed with improved input validation. This issue is fixed in macOS Sonoma 14.6, macOS Monterey 12.7.6, macOS Ventura 13.6.8. An app may be able to modify protected parts of the file system.

Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-40800"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-281"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-29T23:15:12Z",
    "severity": "HIGH"
  },
  "details": "An input validation issue was addressed with improved input validation. This issue is fixed in macOS Sonoma 14.6, macOS Monterey 12.7.6, macOS Ventura 13.6.8. An app may be able to modify protected parts of the file system.",
  "id": "GHSA-fc8m-x59c-5f6r",
  "modified": "2026-04-02T21:31:50Z",
  "published": "2024-07-30T00:34:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40800"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/120910"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/120911"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/120912"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/HT214118"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/HT214119"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/en-us/HT214120"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/kb/HT214118"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/kb/HT214119"
    },
    {
      "type": "WEB",
      "url": "https://support.apple.com/kb/HT214120"
    },
    {
      "type": "WEB",
      "url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2024-2010"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2024/Jul/18"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2024/Jul/19"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2024/Jul/20"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-FF7W-225P-JFC7

Vulnerability from github – Published: 2022-05-13 01:47 – Updated: 2022-05-13 01:47
VLAI
Details

Win32k in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an elevation of privilege vulnerability when it fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability". This CVE ID is unique from CVE-2017-8578, CVE-2017-8580, CVE-2017-8577, and CVE-2017-8467.

Severity
7.0 (High)
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2017-8581"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-281"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-07-11T21:29:00Z",
    "severity": "HIGH"
  },
  "details": "Win32k in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an elevation of privilege vulnerability when it fails to properly handle objects in memory, aka \"Win32k Elevation of Privilege Vulnerability\". This CVE ID is unique from CVE-2017-8578, CVE-2017-8580, CVE-2017-8577, and CVE-2017-8467.",
  "id": "GHSA-ff7w-225p-jfc7",
  "modified": "2022-05-13T01:47:38Z",
  "published": "2022-05-13T01:47:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-8581"
    },
    {
      "type": "WEB",
      "url": "https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8581"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/99423"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1038853"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

No mitigation information available for this CWE.

No CAPEC attack patterns related to this CWE.

← Back to the CWE list