What’s Vulnerable › Vulnerabilities

CVE-2019-11455

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-04-22 · updated 2026-06-17
• Weakness: CWE-125

Description

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).

Affected products

• Canonical Ubuntu Linux: 18.10, 19.04
• Debian Linux: 8.0
• Fedoraproject Fedora: 31, 32
• Tildeslash Monit: before 5.25.3 — fixed in 5.25.3

How to fix

Upgrade to a fixed version: Tildeslash Monit 5.25.3. Check the vendor advisory for mitigations.

References

• https://bitbucket.org/tildeslash/monit/commits/f12d0cdb42d4e74dffe1525d4062c815c48ac57a
• https://github.com/dzflack/exploits/blob/master/macos/monit_dos.py
• https://github.com/dzflack/exploits/blob/master/unix/monit_buffer_overread.py
• https://lists.debian.org/debian-lts-announce/2019/04/msg00028.html
• https://lists.debian.org/debian-lts-announce/2021/12/msg00018.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZQDHRSKTEX5MSYXNCGFTUSFGANBARHX/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L475QJMFFI2QV5QEHAKKPVX6QX6ECUL6/
• https://usn.ubuntu.com/3971-1/
• https://bitbucket.org/tildeslash/monit/commits/f12d0cdb42d4e74dffe1525d4062c815c48ac57a
• https://github.com/dzflack/exploits/blob/master/macos/monit_dos.py
• https://github.com/dzflack/exploits/blob/master/unix/monit_buffer_overread.py
• https://lists.debian.org/debian-lts-announce/2019/04/msg00028.html

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