CVE-2020-23884
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a...
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
- Record
CVE-2020-23884- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-120
- Updated
- 2026-11-02
CVE List No score
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
- Record
CVE-2020-23884- Updated
- 2026-11-02
EUVDEUVD-2020-16621 No score
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
- Record
EUVD-2020-16621- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fgpx-9pxr-6wq9 No score
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a...
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
- Record
GHSA-fgpx-9pxr-6wq9- Weakness
- CWE-120
- Updated
- 2026-11-02
OSV
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
- Record
CVE-2020-23884- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-23884
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
- Record
DEBIAN-CVE-2020-23884- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-23884
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
- Record
UBUNTU-CVE-2020-23884- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
qtimageformats-opensource-srcDebian:12 |
All versions, plus listed versions 5.15.10-15.15.10-25.15.12-15.15.13-15.15.13-2 Show 11 moreShow less5.15.15-15.15.15-25.15.15-35.15.15-45.15.17-15.15.17-25.15.18-15.15.19-15.15.19-25.15.8-25.15.9-1 |
None known |
qtimageformats-opensource-srcDebian:13 |
before 5.15.15-3 | 5.15.15-3 |
qtimageformats-opensource-srcDebian:14 |
before 5.15.15-3 | 5.15.15-3 |
nomacsUbuntu:16.04:LTS |
All versions, plus listed versions 3.0.0+dfsg-1 |
None known |
nomacsUbuntu:18.04:LTS |
All versions, plus listed versions 3.4.1+dfsg-113.4.1+dfsg-11build13.6.1+dfsg-43.8.0+dfsg-13.8.0+dfsg-4 |
None known |
nomacsUbuntu:20.04:LTS |
All versions, plus listed versions 3.12.0+dfsg-23.12.0+dfsg-2build13.12.0+dfsg-3 |
None known |
nomacsUbuntu:22.04:LTS |
All versions, plus listed versions 3.12.0+dfsg-3build23.12.0+dfsg-3build3 |
None known |
nomacsUbuntu:24.04:LTS |
All versions, plus listed versions 3.17.2206+dfsg-2build23.17.2282+dfsg-23.17.2282+dfsg-2build13.17.2282+dfsg-2build2 |
None known |
nomacsUbuntu:25.10 |
All versions, plus listed versions 3.19.1+dfsg-1build13.21.0+dfsg-2 |
None known |
nomacsUbuntu:26.10 |
All versions, plus listed versions 3.21.1+dfsg-13.21.1+dfsg-1build1 |
None known |
nomacsUbuntu:26.04:LTS |
All versions, plus listed versions 3.21.0+dfsg-23.21.1+dfsg-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| 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-2020-23884 is a medium vulnerability (CVSS 5.5) in Nomacs, published November 10, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.98%, the 62nd percentile. Fixed in qtimageformats-opensource-src 5.15.15-3.
References
nomacs.org
github.com/nomacs/nomacs/issues/516
nvd.nist.gov/vuln/detail/CVE-2020-23884
security-tracker.debian.org/tracker/CVE-2020-23884
ubuntu.com/security/CVE-2020-23884
cve.org/CVERecord?id=CVE-2020-23884