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Fencer Vulns
critical 9.1

CVE-2024-34340 json

Authentication Bypass when using using older password hashes

published 2024-05-13 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-34732

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

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.

Patch / fix

  • Cacti cacti 1.2.27
  • cacti Debian 12 1.2.24+ds1-1+deb12u3
  • cacti Debian 14, Debian 13 1.2.27+ds1-1

debian advisories DEBIAN-CVE-2024-34340

  • cacti Ubuntu 20.04 LTS 1.2.10+ds1-1ubuntu1.1
  • cacti Ubuntu 22.04 LTS 1.2.19+ds1-2ubuntu1.1
  • cacti Ubuntu 24.04 LTS 1.2.26+ds1-1ubuntu0.1
  • cacti Ubuntu Pro 18.04 LTS 1.1.38+ds1-1ubuntu0.1~esm3

ubuntu advisories UBUNTU-CVE-2024-34340

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • cacti-spine Package Hub 15 SP6, openSUSE Leap 15.6 1.2.27-bp156.2.3.1
  • cacti Package Hub 15 SP6, openSUSE Leap 15.6 1.2.27-bp156.2.3.1
  • cacti-spine Package Hub 15 SP5, Package Hub 12, openSUSE Leap 15.5 1.2.27-bp155.2.9.1
  • cacti Package Hub 15 SP5, Package Hub 12, openSUSE Leap 15.5 1.2.27-bp155.2.9.1
  • cacti openSUSE Tumbleweed 1.2.27-1.1

opensuse advisories openSUSE-SU-2024:0276-1openSUSE-SU-2024:0274-1openSUSE-SU-2024:13962-1

  • cacti Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 1.2.27-r0

alpine advisories ALPINE-CVE-2024-34340

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-34340 updated cvss 9.1

cacti: authentication bypass when using older password hashes

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.12% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/Cacti/cacti/security/advisories/GHSA-37x7-mfjv-mm7m referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

  • Cacti cacti

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.