CVE-2019-11455
Buffer overflow
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).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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).
- Record
CVE-2019-11455- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - CVSS 2.0
- 5.5 Medium
AV:N/AC:L/Au:S/C:P/I:N/A:P - Weakness
- CWE-125
- Updated
- 2026-11-02
CVE List No score
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).
- Record
CVE-2019-11455- Updated
- 2026-11-02
EUVDEUVD-2019-3130 No score
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).
- Record
EUVD-2019-3130- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7vr9-r7gj-5r8q
Buffer overflow
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).
- Record
GHSA-7vr9-r7gj-5r8q- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
OSVALPINE-CVE-2019-11455
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).
- Record
ALPINE-CVE-2019-11455- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - Updated
- 2026-11-02
OSV
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).
- Record
CVE-2019-11455- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - Updated
- 2026-11-02
Show 4 moreShow less
OSVDEBIAN-CVE-2019-11455
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).
- Record
DEBIAN-CVE-2019-11455- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2019-11455
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).
- Record
UBUNTU-CVE-2019-11455- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - Updated
- 2026-11-02
OSVMGASA-2019-0246 No score
Updated monit packages fix security vulnerabilities
Updated monit package fixes security vulnerabilities:
Zack Flack discovered that Monit incorrectly handled certain input. A remote authenticated user could exploit this to conduct cross-site scripting (XSS) attacks (CVE-2019-11454).
Zack Flack discovered a buffer overread when Monit decoded certain crafted URLs. An attacker could exploit this to leak potentially sensitive information (CVE-2019-11455).
- Record
MGASA-2019-0246- Updated
- 2026-11-02
OSVUSN-4860-1 No score
monit vulnerabilities
Zack Flack discovered that Monit incorrectly handled certain input. A remote authenticated user could exploit this to conduct cross-site scripting (XSS) attacks. (CVE-2019-11454)
Zack Flack discovered a buffer overread when Monit decoded certain crafted URLs. An attacker could exploit this to potentially leak sensitive information. (CVE-2019-11455)
- Record
USN-4860-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
monitAlpine:v3.7 |
before 5.24.0-r2 | 5.24.0-r2 |
monitAlpine:v3.8 |
before 5.25.2-r0 | 5.25.2-r0 |
monitAlpine:v3.9 |
before 5.25.2-r1 | 5.25.2-r1 |
monitDebian:12 |
before 1:5.25.3-1 | 1:5.25.3-1 |
monitDebian:13 |
before 1:5.25.3-1 | 1:5.25.3-1 |
monitDebian:14 |
before 1:5.25.3-1 | 1:5.25.3-1 |
monitDebian:8 From an advisory covering 2 CVEs |
before 1:5.9-1+deb8u2, plus listed versions 1:5.9-11:5.9-1+deb8u1 |
1:5.9-1+deb8u2 |
monitDebian:9 From an advisory covering 2 CVEs |
before 1:5.20.0-6+deb9u2, plus listed versions 1:5.20.0-61:5.20.0-6+deb9u1 |
1:5.20.0-6+deb9u2 |
monitMageia:6 From an advisory covering 2 CVEs |
before 5.25.3-1.1.mga6 | 5.25.3-1.1.mga6 |
monitUbuntu:Pro:14.04:LTS |
before 1:5.6-2ubuntu0.1+esm2, plus listed versions 1:5.5.1-11:5.6-11:5.6-21:5.6-2ubuntu0.1 |
1:5.6-2ubuntu0.1+esm2 |
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| Package | Affected | Fixed |
|---|---|---|
monitUbuntu:Pro:16.04:LTS |
before 1:5.16-2ubuntu0.2+esm1, plus listed versions 1:5.14-21:5.15-11:5.15-21:5.15-31:5.16-11:5.16-21:5.16-2ubuntu0.11:5.16-2ubuntu0.2 |
1:5.16-2ubuntu0.2+esm1 |
monitUbuntu:Pro:18.04:LTS |
before 1:5.25.1-1ubuntu0.1~esm1, plus listed versions 1:5.23.0-21:5.23.0-41:5.25.1-11:5.25.1-1build1 |
1:5.25.1-1ubuntu0.1~esm1 |
monitUbuntu:Pro:14.04:LTS From an advisory covering 2 CVEs |
before 1:5.6-2ubuntu0.1+esm2, plus listed versions 1:5.5.1-11:5.6-11:5.6-21:5.6-2ubuntu0.1 |
1:5.6-2ubuntu0.1+esm2 |
monitUbuntu:Pro:16.04:LTS From an advisory covering 2 CVEs |
before 1:5.16-2ubuntu0.2+esm1, plus listed versions 1:5.14-21:5.15-11:5.15-21:5.15-31:5.16-11:5.16-21:5.16-2ubuntu0.11:5.16-2ubuntu0.2 |
1:5.16-2ubuntu0.2+esm1 |
monitUbuntu:Pro:18.04:LTS From an advisory covering 2 CVEs |
before 1:5.25.1-1ubuntu0.1~esm1, plus listed versions 1:5.23.0-21:5.23.0-41:5.25.1-11:5.25.1-1build1 |
1:5.25.1-1ubuntu0.1~esm1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-11455 is a high vulnerability (CVSS 8.1) in Tildeslash Monit, published April 22, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.88%, the 86th percentile. Fixed in monit 5.24.0-r2.
References
bitbucket.org/tildeslash/monit/commits/f12d0cdb42d4e74dffe1525d4062c815c48ac57a
github.com/dzflack/exploits/blob/master/unix/monit_buffer_overread.py
lists.debian.org/debian-lts-announce/2019/04/msg00028.html
usn.ubuntu.com/3971-1
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L475QJMFFI2QV5QEHAKKPVX6QX6ECUL6
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nvd.nist.gov/vuln/detail/CVE-2019-11455
security.alpinelinux.org/vuln/CVE-2019-11455
security-tracker.debian.org/tracker/CVE-2019-11455
advisories.mageia.org/MGASA-2019-0246.html
bugs.mageia.org/show_bug.cgi?id=25269
ubuntu.com/security/CVE-2019-11455
cve.org/CVERecord?id=CVE-2019-11455