Critical

Authentication Bypass when using using older password hashes

Type: advisorySources: OSV

Cacti provides an operational monitoring and fault management framework. Prior to version 1.2.27, Cacti calls `compat_password_hash` when users set their password. `compat_password_hash` use `password_hash` if there is it, else use `md5`. When verifying password, it calls `compat_password_verify`. In `compat_password_verify`, `password_verify` is called if there is it, else use `md5`. `password_verify` and `password_hash` are supported on PHP < 5.5.0, following PHP manual. The vulnerability is in `compat_password_verify`. Md5-hashed user input is compared with correct password in database by `$md5 == $hash`. It is a loose comparison, not `===`. It is a type juggling vulnerability. Version 1.2.27 contains a patch for the issue.

Products: Not specified
Affected versions: Not specified
Fixed versions: Not specified
CVEs: CVE-2024-34340
Confirmed fixed CVEs: Not specified
Updated in this feed: 8 Nov 2026, 02:08 UTC · Revision 1

Source evidence

Authentication Bypass when using using older password hashes

core-osv · Original source

Published 13 May 2024, 15:26 UTC

osv:CVE-2024-34340

Complete source record

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  "url": "https://osv.dev/vulnerability/CVE-2024-34340",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Authentication Bypass when using using older password hashes",
    "summary": "Cacti provides an operational monitoring and fault management framework. Prior to version 1.2.27, Cacti calls `compat_password_hash` when users set their password. `compat_password_hash` use `password_hash` if there is it, else use `md5`. When verifying password, it calls `compat_password_verify`. In `compat_password_verify`, `password_verify` is called if there is it, else use `md5`. `password_verify` and `password_hash` are supported on PHP < 5.5.0, following PHP manual. The vulnerability is in `compat_password_verify`. Md5-hashed user input is compared with correct password in database by `$md5 == $hash`. It is a loose comparison, not `===`. It is a type juggling vulnerability. Version 1.2.27 contains a patch for the issue.",
    "evidence": "osv:CVE-2024-34340",
    "products": [],
    "severity": "critical",
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      "metrics": [
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          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
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      "modified": "2026-10-28T02:30:53.109961810Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2024/09/msg00027.html",
        "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RBEOAFKRARQHTDIYSL723XAFJ2Q6624X/",
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  "source_id": "core-osv",
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  "published_at": "2024-05-13T15:26:32.364+00:00"
}