realvnc: Null pointer dereference flaw in ClientCutText message handling
Published Feb 5, 2020
7.5
HIGHCVSS 3.1
EPSS 3.12%
Description
A NULL pointer dereference flaw was found in the way LibVNCServer before 0.9.9 handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client.
Affected products
No data.
Configuration 1
- < 0.9.9
Configuration 2
- 19
- 20
- 21
No data.
Red Hat Enterprise Linux 5
vnc
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | vnc | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This flaw is in RealVNC shipped with Red Hat Enterprise Linux 5. A similar flaw was also found in LibVNCServer and was assigned CVE-2014-6053
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.12% (0.03115) | 87.35th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.04% (0.03038) | 85.75th | v5 (v2026.06.15) |
| Mar 30, 2025 | 3.38% (0.03383) | 86.25th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.27% (0.02270) | 74.38th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.38% (0.03383) | 86.55th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.21% (0.01205) | 85.85th | v3 (v2023.03.01) |
| Apr 17, 2024 | 1.21% (0.01205) | 85.03th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.21% (0.01205) | 83.02th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
References (11)
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/139654.html x_refsource_MISCMailing ListThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/139814.html x_refsource_MISCMailing ListThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140219.html x_refsource_MISCMailing ListThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2014-September/139445.html x_refsource_MISCMailing ListThird Party Advisory
- http://seclists.org/oss-sec/2014/q3/639 x_refsource_MISCMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2014/09/23/6 x_refsource_MISCMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2010-5304 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1804723 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2010-5304
- https://packetstormsecurity.com/files/89160/RealVNC-VNC-Server-Free-Edition-4.1.3-Denial-Of-Service.html
- https://www.cve.org/CVERecord?id=CVE-2010-5304
Change history (0)
No recorded changes yet.