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Fencer Vulns
high 8.1

CVE-2019-11455 json

A buffer over-read in Util_urlDecode in util.c in Tildeslash Monit before 5.25.3 allows a remote authenticated attacker to retrieve the con…

published 2019-04-22 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-3130

cvss
8.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

A buffer over-read in Util_urlDecode in util.c in Tildeslash Monit before 5.25.3 allows a remote authenticated attacker to retrieve the contents of adjacent memory via manipulation of GET or POST parameters. The attacker can also cause a denial of service (application outage).

Patch / fix

  • tildeslash monit 5.25.3
  • monit Debian 14, Debian 13, Debian 12 1:5.25.3-1

debian advisories DEBIAN-CVE-2019-11455

  • monit Ubuntu Pro 14.04 LTS 1:5.6-2ubuntu0.1+esm2
  • monit Ubuntu Pro 16.04 LTS 1:5.16-2ubuntu0.2+esm1
  • monit Ubuntu Pro 18.04 LTS 1:5.25.1-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2019-11455

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

  • monit Alpine 3.7 5.24.0-r2
  • monit Alpine 3.8 5.25.2-r0
  • monit Alpine 3.9 5.25.2-r1

alpine advisories ALPINE-CVE-2019-11455

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-2019-11455 updated cvss 5.1

monit: buffer over-read in function Util_urlDecode in util.c

  • 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

Exploit prediction

2.88% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/dzflack/exploits/blob/master/unix/monit_buffer_overread.py referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/dzflack/exploits/blob/master/macos/monit_dos.py referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD 2.0 5.5 AV:N/AC:L/Au:S/C:P/I:N/A:P

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.